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Thursday, November 12, 2009
Sun Harvest Farm: Solar hot water and more
Sun Harvest Farm, owned by Jerry and Penny Kroener, Ridgeway, WI
Renewable Energy Projects
September 2009 Update
General:
In 2005 we embarked on major renovations and additions to our old farmhouse. This included working with Focus on Energy to have site assessments performed for Solar Photovoltaic, Solar Thermal and Wind Turbine Systems. We also investigated wood burning systems because we have substantial quantities of firewood on our property. Our decisions included the following:
1. Add additional insulation, all new windows and new doors.
2. Replace our old oil burning furnace with a high efficiency propane boiler (our little Munchkin).
3. Install a Solar Photovoltaic grid-connected system to produce electricity.
4. Install a Solar Thermal (hot water) system to preheat domestic hot water and provide some house heat.
5. Install a counter-flow masonry heater fireplace using our own limestone for the masonry cladding.
6. In 2008 we built and installed a hot air collector to provide some heat in our barn workshop.
7. In 2009 we installed our 2nd Photovoltaic grid-connected system.
8. In 2009 we also upgraded our solar hot water storage tank
Improving Efficiency
Our first goal was to improve the efficiency of the areas in the old part of the farmhouse, and to include very high efficiency within the new addition. We installed new Pella windows and doors throughout. Additional insulation was added where possible and a moisture/air barrier under new fiber cement siding, which was installed on the entire house. The new construction included R-21 insulation in the walls and blown-in R-50 in the ceiling. We removed the old oil-fired hot water heater and the oil burner from the warm air furnace. A high efficiency propane gas boiler (Munchkin T-50) was installed to be our back up for heating and the new domestic hot water tank. We also installed radiant under floor heating in the new great room area and plan to install additional radiant heating in certain of the old house areas. The existing warm air furnace was retained, with the addition of a water-to-air heat exchanger, which allowed us keep the central AC unit and also to provide warm air heating to the upstairs area. We have also installed compact fluorescent light bulbs throughout the entire house and in the barn workshop area.
Solar Thermal Hot Water System
Our system as designed to provide domestic hot water and a portion of the house heating and was put into operation in March 2006. It includes:
• Eight 4 ft x 10 ft Heliodyne Gobi 410 collectors, ground-mounted at a 60 degree tilt angle
• 1000 gallon concrete hot water storage tank, with EPDM rubber liner
• Approximately 600 ft of 1 inch copper tubing made into coils for heat exchangers
• Pump, valves, expansion tanks, controller, copper piping, propylene glycol, insulation, etc.
•
We performed a considerable amount of the work to install the system including:
• Installing the concrete tank and liner
• Bending the tubing into coils and installing them in the tank
• Installing 14 concrete pillars
• Digging trenches and installing piping from collectors into basement
• Erecting the framework and the collectors
We worked with Light Energy Systems of Madison (now Full Spectrum Solar) to design the system and to provide the parts and some of the labor. The total system cost was approximately $20,000, but we received a Focus on Energy grant of $3,000 and a Federal Tax Credit of $2,000 so our out-of-pocket costs were about $15,000.
During 2009 we decided to replace the concrete tank due to excessive moisture problems in the basement area. We demolished the tank piece by piece and carried it out of the basement. We replaced it with a tank made by STSS Co. Inc from Mechanicsburg PA. The new tank is collapsible so it can be moved through regular sized doorways. When in place it will be 80” round and 4’ high with all penetrations installed at the factory according to our heat exchanger specifications. It is sealed, insulated and with hold up to 822 gallons of water. We reused the copper heat exchangers that we had made for the old tank. We also installed a “heat dump” under the solar collectors, which was made of 24 ft of Slant Fin baseboard hydronic registers. The purpose of the heat dump is to dissipate excess heat produced during the summer when we only use the hot water for pre-heating the domestic hot water. The total costs for the new tank, including demolishing the old tank, were about $3,500.
Masonry Heater Fireplace
We investigated wood-burning systems and decided to build a masonry heater fireplace in order to take advantage of renewable resources on our property. We have an ample supply of trees on our property that we harvest by cutting dead trees. We constructed a woodshed that dries and stores about 10 cords of split firewood.
The fireplace is specially designed to be efficient and environmentally friendly because the combustion chamber burns at between 1500-2000 degrees F. The fire burns for 2-3 hours but the large amount of masonry mass stores and radiates the heat for 12-24 hours. Our fireplace is centrally located so it radiates heat over a large area of our kitchen and great room. Two stainless steel U-Tube heat exchangers are also built into the core to capture some heat, which is circulated to the solar storage tank in the basement.
The core of our heater was designed by Heat-Kit of Canada, but originated centuries ago from designs in Europe and Russia. Gimme Shelter Construction of Amherst, WI constructed the core.
We decided to use natural limestone and sandstone from our property for the masonry cladding. Some of the stones were recovered from the foundation of our old summer kitchen. We performed the masonry work ourselves, which saved us $20,000+ in labor costs. Our cost for the core, chimney materials and mortar for the limestone was approximately $12,000.
Solar Photovoltaic Electric System # 1
This system was designed to produce about half of our annual electricity needs and was put into operation in April 2006. We chose a grid-tied system that sends excess electricity to the Alliant Energy power grid. We have a net-metering agreement where we are compensated for the power we produce at the same rate as we pay for electricity. During the first full year of operation our PV system produced 4,700 kilowatt-hours, which was 43% of our total usage of 11,100 kWh.
The PV system includes the following components:
• 16 Kyocera 170 watt modules for a total output of 2.7 kW
• Wattsun dual axis tracker system (the system follows the sun morning until night)
• SMA Sunny Boy 2500 inverter/controller (converts DC voltage to AC for the grid)
• Concrete foundation (5 yds with rebar), steel post & framework
• Disconnect switches, wires, conduit, and other miscellaneous electrical items
Our system produces between 200-600 volts (DC current) when the sun shines. It is facing east when the sun rises and follows the sun all day so it is facing west when the sun goes down. The DC current comes into the basement, goes through a disconnect switch and into the Sunny Boy inverter/controller. This device changes the DC current into AC current and controls how the power goes out into the grid. The current goes outside through a disconnect switch, back through our main breaker panel, and then out through the meter to the grid. The best days are when we are not using much power and the meter is actually going backward!
We worked with Light Energy Systems of Madison (now Full Spectrum Solar) to design the system and to provide the parts and some of the labor.
The total cost of the system was about $25,000, but we received a Focus on Energy grant of $8,700 and a Federal Tax Credit of $2,000, so out out-of-pocket costs were about $14,000.
Solar Photovoltaic Electric System # 2
In 2009 we installed our second PV system. We took advantage of a special program from Alliant Energy where we have contracted for 10 years to sell all of the power produced by the system for 25 cents per kWh. It did require us to install a new meter pedestal, at a cost of $1,100 so that the electricity from the new system could be metered separately. We also have to pay about 41 cents/day for the new meter charge, as well as sign up for the Alliant Second Nature program (where we pay a small premium for our energy purchased, which will be from renewable sources). Our total cost for the system was $31,168, and we did some of the work ourselves (digging, concrete, trenching, wire, etc). We will get a 25% Focus on Energy grant of about $7,800 and a 30% Federal tax credit in 2010 of about $9,300. Therefore, our out of pocket costs will be about $14,000. This system has the potential to produce about an 11% annual rate of return.
We purchased the main part of the system from DH Solar. Their system uses a tracking system that they adapted from their experience with commercial satellite tracking systems. The system has 16 Suncast PV panels, each of which is rated at 210 watts, or a total of 3.36 kW. The inverter is a SMA Sunny Boy 3000US.
Barn Workshop Hot Air Collector System
In 2008 we designed, built and installed a hot air collector system on the south side of the old milkhouse. The collector was made from tempered glass, aluminum expandable tubes, painted black, and solid foil-faced insulation. The 6” outlet and inlet piping contains a bi-metallic sensor/control relay and a small in-duct fan to pipe the heat into the barn workshop. The total cost of this system was about $600. A woodstove in the milk house provides backup heat on cloudy days, which is piped with the same piping system into the barn. This is a trial and error system. It looks like we might have to reposition the system to more directly face south to maximize the heat output.
Renewable Energy Projects
September 2009 Update
General:
In 2005 we embarked on major renovations and additions to our old farmhouse. This included working with Focus on Energy to have site assessments performed for Solar Photovoltaic, Solar Thermal and Wind Turbine Systems. We also investigated wood burning systems because we have substantial quantities of firewood on our property. Our decisions included the following:
1. Add additional insulation, all new windows and new doors.
2. Replace our old oil burning furnace with a high efficiency propane boiler (our little Munchkin).
3. Install a Solar Photovoltaic grid-connected system to produce electricity.
4. Install a Solar Thermal (hot water) system to preheat domestic hot water and provide some house heat.
5. Install a counter-flow masonry heater fireplace using our own limestone for the masonry cladding.
6. In 2008 we built and installed a hot air collector to provide some heat in our barn workshop.
7. In 2009 we installed our 2nd Photovoltaic grid-connected system.
8. In 2009 we also upgraded our solar hot water storage tank
Improving Efficiency
Our first goal was to improve the efficiency of the areas in the old part of the farmhouse, and to include very high efficiency within the new addition. We installed new Pella windows and doors throughout. Additional insulation was added where possible and a moisture/air barrier under new fiber cement siding, which was installed on the entire house. The new construction included R-21 insulation in the walls and blown-in R-50 in the ceiling. We removed the old oil-fired hot water heater and the oil burner from the warm air furnace. A high efficiency propane gas boiler (Munchkin T-50) was installed to be our back up for heating and the new domestic hot water tank. We also installed radiant under floor heating in the new great room area and plan to install additional radiant heating in certain of the old house areas. The existing warm air furnace was retained, with the addition of a water-to-air heat exchanger, which allowed us keep the central AC unit and also to provide warm air heating to the upstairs area. We have also installed compact fluorescent light bulbs throughout the entire house and in the barn workshop area.
Solar Thermal Hot Water System
Our system as designed to provide domestic hot water and a portion of the house heating and was put into operation in March 2006. It includes:
• Eight 4 ft x 10 ft Heliodyne Gobi 410 collectors, ground-mounted at a 60 degree tilt angle
• 1000 gallon concrete hot water storage tank, with EPDM rubber liner
• Approximately 600 ft of 1 inch copper tubing made into coils for heat exchangers
• Pump, valves, expansion tanks, controller, copper piping, propylene glycol, insulation, etc.
•
We performed a considerable amount of the work to install the system including:
• Installing the concrete tank and liner
• Bending the tubing into coils and installing them in the tank
• Installing 14 concrete pillars
• Digging trenches and installing piping from collectors into basement
• Erecting the framework and the collectors
We worked with Light Energy Systems of Madison (now Full Spectrum Solar) to design the system and to provide the parts and some of the labor. The total system cost was approximately $20,000, but we received a Focus on Energy grant of $3,000 and a Federal Tax Credit of $2,000 so our out-of-pocket costs were about $15,000.
During 2009 we decided to replace the concrete tank due to excessive moisture problems in the basement area. We demolished the tank piece by piece and carried it out of the basement. We replaced it with a tank made by STSS Co. Inc from Mechanicsburg PA. The new tank is collapsible so it can be moved through regular sized doorways. When in place it will be 80” round and 4’ high with all penetrations installed at the factory according to our heat exchanger specifications. It is sealed, insulated and with hold up to 822 gallons of water. We reused the copper heat exchangers that we had made for the old tank. We also installed a “heat dump” under the solar collectors, which was made of 24 ft of Slant Fin baseboard hydronic registers. The purpose of the heat dump is to dissipate excess heat produced during the summer when we only use the hot water for pre-heating the domestic hot water. The total costs for the new tank, including demolishing the old tank, were about $3,500.
Masonry Heater Fireplace
We investigated wood-burning systems and decided to build a masonry heater fireplace in order to take advantage of renewable resources on our property. We have an ample supply of trees on our property that we harvest by cutting dead trees. We constructed a woodshed that dries and stores about 10 cords of split firewood.
The fireplace is specially designed to be efficient and environmentally friendly because the combustion chamber burns at between 1500-2000 degrees F. The fire burns for 2-3 hours but the large amount of masonry mass stores and radiates the heat for 12-24 hours. Our fireplace is centrally located so it radiates heat over a large area of our kitchen and great room. Two stainless steel U-Tube heat exchangers are also built into the core to capture some heat, which is circulated to the solar storage tank in the basement.
The core of our heater was designed by Heat-Kit of Canada, but originated centuries ago from designs in Europe and Russia. Gimme Shelter Construction of Amherst, WI constructed the core.
We decided to use natural limestone and sandstone from our property for the masonry cladding. Some of the stones were recovered from the foundation of our old summer kitchen. We performed the masonry work ourselves, which saved us $20,000+ in labor costs. Our cost for the core, chimney materials and mortar for the limestone was approximately $12,000.
Solar Photovoltaic Electric System # 1
This system was designed to produce about half of our annual electricity needs and was put into operation in April 2006. We chose a grid-tied system that sends excess electricity to the Alliant Energy power grid. We have a net-metering agreement where we are compensated for the power we produce at the same rate as we pay for electricity. During the first full year of operation our PV system produced 4,700 kilowatt-hours, which was 43% of our total usage of 11,100 kWh.
The PV system includes the following components:
• 16 Kyocera 170 watt modules for a total output of 2.7 kW
• Wattsun dual axis tracker system (the system follows the sun morning until night)
• SMA Sunny Boy 2500 inverter/controller (converts DC voltage to AC for the grid)
• Concrete foundation (5 yds with rebar), steel post & framework
• Disconnect switches, wires, conduit, and other miscellaneous electrical items
Our system produces between 200-600 volts (DC current) when the sun shines. It is facing east when the sun rises and follows the sun all day so it is facing west when the sun goes down. The DC current comes into the basement, goes through a disconnect switch and into the Sunny Boy inverter/controller. This device changes the DC current into AC current and controls how the power goes out into the grid. The current goes outside through a disconnect switch, back through our main breaker panel, and then out through the meter to the grid. The best days are when we are not using much power and the meter is actually going backward!
We worked with Light Energy Systems of Madison (now Full Spectrum Solar) to design the system and to provide the parts and some of the labor.
The total cost of the system was about $25,000, but we received a Focus on Energy grant of $8,700 and a Federal Tax Credit of $2,000, so out out-of-pocket costs were about $14,000.
Solar Photovoltaic Electric System # 2
In 2009 we installed our second PV system. We took advantage of a special program from Alliant Energy where we have contracted for 10 years to sell all of the power produced by the system for 25 cents per kWh. It did require us to install a new meter pedestal, at a cost of $1,100 so that the electricity from the new system could be metered separately. We also have to pay about 41 cents/day for the new meter charge, as well as sign up for the Alliant Second Nature program (where we pay a small premium for our energy purchased, which will be from renewable sources). Our total cost for the system was $31,168, and we did some of the work ourselves (digging, concrete, trenching, wire, etc). We will get a 25% Focus on Energy grant of about $7,800 and a 30% Federal tax credit in 2010 of about $9,300. Therefore, our out of pocket costs will be about $14,000. This system has the potential to produce about an 11% annual rate of return.
We purchased the main part of the system from DH Solar. Their system uses a tracking system that they adapted from their experience with commercial satellite tracking systems. The system has 16 Suncast PV panels, each of which is rated at 210 watts, or a total of 3.36 kW. The inverter is a SMA Sunny Boy 3000US.
Barn Workshop Hot Air Collector System
In 2008 we designed, built and installed a hot air collector system on the south side of the old milkhouse. The collector was made from tempered glass, aluminum expandable tubes, painted black, and solid foil-faced insulation. The 6” outlet and inlet piping contains a bi-metallic sensor/control relay and a small in-duct fan to pipe the heat into the barn workshop. The total cost of this system was about $600. A woodstove in the milk house provides backup heat on cloudy days, which is piped with the same piping system into the barn. This is a trial and error system. It looks like we might have to reposition the system to more directly face south to maximize the heat output.
Friday, October 30, 2009
PSC Approval of Bay Front Project Advances Wood Over Coal
IMMEDIATE RELEASE
October 30, 2009
MORE INFORMATION
Michael Vickerman
RENEW Wisconsin
608.255.4044
mvickerman@renewwisconsin.org
Madison, WI (October 30, 2009) RENEW Wisconsin today hailed the decision by the Public Service Commission to approve a utility’s plan to repower an aging northern Wisconsin coal-fired plant with locally available wood fuel.
The approval allows Northern States Power Company-Wisconsin (NSPW), a subsidiary of Xcel Energy, to install the state’s first biomass gasifier. The system will produce synthetic gas from a variety of wood sources to produce electricity at the company’s Bay Front Power Plant in Ashland, Wisconsin.
“This project will yield multiple dividends to the utility’s ratepayers and the local economy in and around Ashland,” said Michael Vickerman, executive director of RENEW Wisconsin, a statewide advocacy group for renewable energy.
“Capital projects are few and far between in northern Wisconsin. Rather than closing down an inefficient plant that relies on imported fossil fuel, NSPW is extending its life and improving its environmental performance with this switch to a sustainable energy source,” Vickerman said.
“This proposal is an excellent resource fit for this part of the state. The money spent to acquire wood fuel will remain in the local area, instead of being exported to western coal states,” Vickerman said.
END
RENEW Wisconsin (www.renewwisconsin.org) is an independent, nonprofit 501(c)(3) organization that acts as a catalyst to advance a sustainable energy future through public policy and private sector initiatives.
October 30, 2009
MORE INFORMATION
Michael Vickerman
RENEW Wisconsin
608.255.4044
mvickerman@renewwisconsin.org
Madison, WI (October 30, 2009) RENEW Wisconsin today hailed the decision by the Public Service Commission to approve a utility’s plan to repower an aging northern Wisconsin coal-fired plant with locally available wood fuel.
The approval allows Northern States Power Company-Wisconsin (NSPW), a subsidiary of Xcel Energy, to install the state’s first biomass gasifier. The system will produce synthetic gas from a variety of wood sources to produce electricity at the company’s Bay Front Power Plant in Ashland, Wisconsin.
“This project will yield multiple dividends to the utility’s ratepayers and the local economy in and around Ashland,” said Michael Vickerman, executive director of RENEW Wisconsin, a statewide advocacy group for renewable energy.
“Capital projects are few and far between in northern Wisconsin. Rather than closing down an inefficient plant that relies on imported fossil fuel, NSPW is extending its life and improving its environmental performance with this switch to a sustainable energy source,” Vickerman said.
“This proposal is an excellent resource fit for this part of the state. The money spent to acquire wood fuel will remain in the local area, instead of being exported to western coal states,” Vickerman said.
RENEW Wisconsin (www.renewwisconsin.org) is an independent, nonprofit 501(c)(3) organization that acts as a catalyst to advance a sustainable energy future through public policy and private sector initiatives.
News releases
2009
10.30.09 PSC Approval of Bay Front Project Advances Wood Over Coal
10.23.09 Solar Outlook Set to Dim in 2010
09.15.09 State Senate strongly backs new rules for wind projects
08.27.09 PSC opens door for more in-state renewable installations
07.09.09 Statement on PSC approval of Alliant's Bent Tree project
05.08.09 State snares federal dollars for renewable energy work
01.22.09 Manitowoc County Says “No Can Do” to Windpower Project
2008
12.03.08 RENEW, Farmers Union, and partners launch Homegrown Renewable Energy Campaign
11.17.08 RENEW, Clean Wisconsin endorse Manitowoc wind project
11.11.08 RENEW's reaction to PSC rejection of Cassville coal plant
01.16.08 Calumet County morass blocks wind projects again
2007
12.18.07 Trempealeau sharply limits wind service
10.30.09 PSC Approval of Bay Front Project Advances Wood Over Coal
10.23.09 Solar Outlook Set to Dim in 2010
09.15.09 State Senate strongly backs new rules for wind projects
08.27.09 PSC opens door for more in-state renewable installations
07.09.09 Statement on PSC approval of Alliant's Bent Tree project
05.08.09 State snares federal dollars for renewable energy work
01.22.09 Manitowoc County Says “No Can Do” to Windpower Project
2008
12.03.08 RENEW, Farmers Union, and partners launch Homegrown Renewable Energy Campaign
11.17.08 RENEW, Clean Wisconsin endorse Manitowoc wind project
11.11.08 RENEW's reaction to PSC rejection of Cassville coal plant
01.16.08 Calumet County morass blocks wind projects again
2007
12.18.07 Trempealeau sharply limits wind service
Friday, October 23, 2009
Solar outlook set to dim in 2010
IMMEDIATE RELEASE
October 23, 2009
MORE INFORMATION
Michael Vickerman
RENEW Wisconsin
608.255.4044
mvickerman@renewwisconsin.org
Utilities’ voluntary incentives hit limits
(Madison, WI – October 23, 2009) In contrast to the rapid growth experienced in the last three years, a leading state renewable energy advocacy group expects a sharp decline in installed solar electric capacity in 2010.
In statements directed to the Public Service Commission (PSC), three utilities – Wisconsin Electric Power (WE), Wisconsin Power and Light (WPL), and Wisconsin Public Service (WPS) – acknowledged yesterday that their voluntary solar incentive programs will be discontinued for new customers. All three had offered, on a limited basis, a special buyback rate for the generated electricity, which effectively cut in half the payback period for the systems.
“These three incentive programs spurred homeowners and businesses to install nearly 2.5 megawatts of solar electric capacity,” said Michael Vickerman, executive director of RENEW Wisconsin. “But for those incentives, we wouldn’t not have reached the milestone that PSC Chair Eric Callisto recently celebrated at the installation of a system serving the Town of Menasha.”
“Though voluntary initiatives are certainly welcome, they cannot by themselves sustain a vibrant solar marketplace. By far the most effective way to maintain solar’s momentum is for the Legislature to require utilities to purchase a set amount of renewable energy from their own customers at a reasonable price,” said Vickerman.
Going into 2010, the only investor-owned utility that has a special buyback rate is Madison Gas and Electric (MG&E), which pays its customers 25 cents per kilowatt-hour for electricity generated from their solar systems. MG&E’s voluntary program still has room for another 600 kilowatts of customer-owned solar.
Until their voluntary initiatives had reached capacity, both WPS and WPL had been paying the same rate as MG&E, while WE had offered a 22.5 cents for each kilowatt-hour generated.
“If renewable energy is to drive job growth in Wisconsin, lawmakers must create favorable marketplace conditions to support new installations going forward. No policy will accomplish that goal more effectively than a state initiative to establish higher buyback rates,” Vickerman said.
END
October 23, 2009
MORE INFORMATION
Michael Vickerman
RENEW Wisconsin
608.255.4044
mvickerman@renewwisconsin.org
Utilities’ voluntary incentives hit limits
(Madison, WI – October 23, 2009) In contrast to the rapid growth experienced in the last three years, a leading state renewable energy advocacy group expects a sharp decline in installed solar electric capacity in 2010.
In statements directed to the Public Service Commission (PSC), three utilities – Wisconsin Electric Power (WE), Wisconsin Power and Light (WPL), and Wisconsin Public Service (WPS) – acknowledged yesterday that their voluntary solar incentive programs will be discontinued for new customers. All three had offered, on a limited basis, a special buyback rate for the generated electricity, which effectively cut in half the payback period for the systems.
“These three incentive programs spurred homeowners and businesses to install nearly 2.5 megawatts of solar electric capacity,” said Michael Vickerman, executive director of RENEW Wisconsin. “But for those incentives, we wouldn’t not have reached the milestone that PSC Chair Eric Callisto recently celebrated at the installation of a system serving the Town of Menasha.”
“Though voluntary initiatives are certainly welcome, they cannot by themselves sustain a vibrant solar marketplace. By far the most effective way to maintain solar’s momentum is for the Legislature to require utilities to purchase a set amount of renewable energy from their own customers at a reasonable price,” said Vickerman.
Going into 2010, the only investor-owned utility that has a special buyback rate is Madison Gas and Electric (MG&E), which pays its customers 25 cents per kilowatt-hour for electricity generated from their solar systems. MG&E’s voluntary program still has room for another 600 kilowatts of customer-owned solar.
Until their voluntary initiatives had reached capacity, both WPS and WPL had been paying the same rate as MG&E, while WE had offered a 22.5 cents for each kilowatt-hour generated.
“If renewable energy is to drive job growth in Wisconsin, lawmakers must create favorable marketplace conditions to support new installations going forward. No policy will accomplish that goal more effectively than a state initiative to establish higher buyback rates,” Vickerman said.
Thursday, October 22, 2009
Comments in opposition to PSC staff recommendation to raise rates in MGE's Energy for Tomorrow program
COMMENTS FILED ELECTRONICALLY IN
Application of Madison Gas and Electric Company for Authority to Change Electric and Natural Gas Rates 3270-UR-116
Commentor Information:
Name: Michael Vickerman
Address: 509 Elmside Blvd.
City: Madison State:WI Zip:53704
E-mail: mvickerman@renewwisconsin.org
To the Commission:
I would like to comment on the recommendations from PSC staff (witnesses John Feit and Jerry Albrecht) to increase the premium charged to Green Power Tomorrow subscribers. I approach this issue from a multiple of perspectives: (1) as a professional renewable energy advocate; (2) as a 100% program subscriber (since 1999); and (3) as a proud owner of a 1.7 kW solar electric system that was installed after Madison Gas and Electric launched its Clean Power Partners program in 2008.
All of MGE's Clean Power Partners, (including me) sell the output from our solar systems to Green Power Tomorrow program subscribers through a 25 cents/kWh buyback rate. Among these customer-producers of clean energy are TDS Custom Construction, Goodman Community Center, City of Madison, Dane County Regional Airport, Madison No Fear Dentistry, and Isthmus Engineering.
The solar buyback rate is supported through voluntary purchases of renewable electricity. When the Clean Power Partners program was announced, MGE envisioned a 300 kilowatt ceiling on solar energy purchases through the special tariff. All Clean Power Partners must subscribe to Green Power Tomorrow. At the same time Clean Power Partners was launched, MGE reduced the subscription premium to a penny per kWh. The declining premium sparked a significant upsurge in subscribership, which enabled MGE to carve out a larger space for solar electric production supported by the program. The ceiling on the Clean Power Partners program is now one megawatt.
I mention Clean Power Partners to highlight the link between subscription volume and solar electric production. The larger the volume of electricity flowing through Green Power Tomorrow, the greater the amount of solar generation that the program can support. The reverse, however, is also true.
The participation rate of these programs is very sensitive to premium amounts. According to research compiled by the National Renewable Energy Laboratory, the median premium price of voluntary programs nationwide is about a penny per kWh. Programs with higher premiums have a significantly smaller participation rates than Green Power Tomorrow. Forcing MGE to increase its renewable energy premium would trigger a falloff in participation, which in turn would very likely result in higher rates to nonparticipating ratepayers. Moreover, a contraction in subscribership may very well force MGE to curtail its Clean Power Partners program due to insufficient program revenues.
Clearly, the special buyback rates offered by MGE, Wisconsin Power & Light and We Energies have delivered a positive jolt to Wisconsin's solar electric marketplace. Wisconsin is actually a regional leader in solar electric capacity. No other Midwestern state comes close to where Wisconsin is right now. Given the significant progress made in the last three years, how does it benefit the state to choke off the one enabling policy that makes solar generation a reasonable value proposition to responsible energy users?
Shifting gears somewhat, there is an implicit understanding among program subscribers that they are committing to energy resources whose costs are fixed through long-term contracts. Many of these subscribers are likely to react negatively to a higher premium, because they know that the renewable resources leveraged through Green Power Tomorrow are not going up in price. They are likely to interpret an increased premium as expressing a public policy preference for burning more fossil fuel to take advantage of temporary dips in coal and gas prices. Is that really the message the PSC wishes to convey?
Let's summarize the consequences of a higher premium:
1) Decline in program participation rate, due to a combination of economic impacts and negative reinforcement.
2) Decline in program revenues, forcing MGE to compensate through higher rates on all customers.
3) Premature seizing up of the solar electric marketplace in the Madison area.
It is highly ironic that the PSC would consider inflicting such a cascading sequence of perverse outcomes to a nationally recognized renewable energy program like Green Power Tomorrow. Just last month, MGE's renewable energy program received the U.S. Department of Energy's (DOE) Utility Green Power Program of the Year Award. The award was announced at the Green Power Leadership Awards banquet in Atlanta, Georgia. The honor bestowed to MGE was well-deserved, as evidenced by the letter I wrote in support of its program (see below).
Let's not wreck a good thing. Please refrain from forcing MGE to raise its premium on current and future renewable energy subscribers. Thank you.
Michael Vickerman
RENEW Wisconsin
222 S. Hamilton Street
Madison, WI 53703
Home address:
509 Elmside Blvd.
Madison, WI 53704
+++++++++++++++++
June 5, 2009
Mr. Courtney Welch
Green Power Leadership Awards
Navarro Research & Engineering for
U.S. DOE Golden Field Office
1617 Cole Blvd, MS 1501
Golden, CO 80401
Dear Mr. Welch:
It is with great pleasure that I submit this letter of support on behalf of Green Power Tomorrow, the highly popular renewable energy subscription program offered by Madison Gas & Electric. I offer this letter of support not only in my capacity as a professional renewable energy advocate, but also as a customer purchasing 100% of household electrical use through this program.
By any objective standard, MG&E's program is a hit with its customers. As reported in NREL's annual assessment of leading green power programs, Green Power Tomorrow has the second-highest customer participation rate (9.7%) among investor-owned utilities in the United States. The program ranks sixth among all utilities in sales as a percentage of total retail electricity sold (3.8%). Through a judicious blend of wind projects from the region, MG&E was able to lower its premium to one cent/kWh, which set the stage for the upsurge in customer participation in 2008. Many a Madison landmark, from the State Capitol to Monona Terrace Convention Center, is powered in part through Green Power Tomorrow.
Notwithstanding its modest premium, the program also supports customer-owned photovoltaic systems through a special buyback rate fixed at $0.25/kWh for 10 years. Called Clean Power Partners, this initiative has motivated dozens of customers to install PV on the residence or business. Last August, I became a Clean Power Partner, when the electricity from the newly installed 1.7 kW system on our house began flowing into the grid. With this installation we now produce nearly emission-free 2,000 kWh/year on top of the 4,000 kWh/yr of emission-free electricity we buy from MG&E. In the 18 months since Clean Power Partners was launched, customer participation has surpassed MG&E's initial expectations, prompting the utility to increase the ceiling on this initiative from 300 kW to one megawatt.
More than a renewable energy program, Green Power Tomorrow is a community-based sustainability initiative that supports about 50 MW of windpower that otherwise would not have been part of MGE’s resource portfolio. Instead of settling for small, incremental growth for its program, MGE elected to pursue a more ambitious path that would be appealing and affordable to a broad cross-section of its customer base, and the results are impressive. In my estimation, it is an outstanding candidate for this year's Utility Green Power Program of the Year.
Sincerely,
Michael Vickerman
RENEW Wisconsin
Application of Madison Gas and Electric Company for Authority to Change Electric and Natural Gas Rates 3270-UR-116
Commentor Information:
Name: Michael Vickerman
Address: 509 Elmside Blvd.
City: Madison State:WI Zip:53704
E-mail: mvickerman@renewwisconsin.org
To the Commission:
I would like to comment on the recommendations from PSC staff (witnesses John Feit and Jerry Albrecht) to increase the premium charged to Green Power Tomorrow subscribers. I approach this issue from a multiple of perspectives: (1) as a professional renewable energy advocate; (2) as a 100% program subscriber (since 1999); and (3) as a proud owner of a 1.7 kW solar electric system that was installed after Madison Gas and Electric launched its Clean Power Partners program in 2008.
All of MGE's Clean Power Partners, (including me) sell the output from our solar systems to Green Power Tomorrow program subscribers through a 25 cents/kWh buyback rate. Among these customer-producers of clean energy are TDS Custom Construction, Goodman Community Center, City of Madison, Dane County Regional Airport, Madison No Fear Dentistry, and Isthmus Engineering.
The solar buyback rate is supported through voluntary purchases of renewable electricity. When the Clean Power Partners program was announced, MGE envisioned a 300 kilowatt ceiling on solar energy purchases through the special tariff. All Clean Power Partners must subscribe to Green Power Tomorrow. At the same time Clean Power Partners was launched, MGE reduced the subscription premium to a penny per kWh. The declining premium sparked a significant upsurge in subscribership, which enabled MGE to carve out a larger space for solar electric production supported by the program. The ceiling on the Clean Power Partners program is now one megawatt.
I mention Clean Power Partners to highlight the link between subscription volume and solar electric production. The larger the volume of electricity flowing through Green Power Tomorrow, the greater the amount of solar generation that the program can support. The reverse, however, is also true.
The participation rate of these programs is very sensitive to premium amounts. According to research compiled by the National Renewable Energy Laboratory, the median premium price of voluntary programs nationwide is about a penny per kWh. Programs with higher premiums have a significantly smaller participation rates than Green Power Tomorrow. Forcing MGE to increase its renewable energy premium would trigger a falloff in participation, which in turn would very likely result in higher rates to nonparticipating ratepayers. Moreover, a contraction in subscribership may very well force MGE to curtail its Clean Power Partners program due to insufficient program revenues.
Clearly, the special buyback rates offered by MGE, Wisconsin Power & Light and We Energies have delivered a positive jolt to Wisconsin's solar electric marketplace. Wisconsin is actually a regional leader in solar electric capacity. No other Midwestern state comes close to where Wisconsin is right now. Given the significant progress made in the last three years, how does it benefit the state to choke off the one enabling policy that makes solar generation a reasonable value proposition to responsible energy users?
Shifting gears somewhat, there is an implicit understanding among program subscribers that they are committing to energy resources whose costs are fixed through long-term contracts. Many of these subscribers are likely to react negatively to a higher premium, because they know that the renewable resources leveraged through Green Power Tomorrow are not going up in price. They are likely to interpret an increased premium as expressing a public policy preference for burning more fossil fuel to take advantage of temporary dips in coal and gas prices. Is that really the message the PSC wishes to convey?
Let's summarize the consequences of a higher premium:
1) Decline in program participation rate, due to a combination of economic impacts and negative reinforcement.
2) Decline in program revenues, forcing MGE to compensate through higher rates on all customers.
3) Premature seizing up of the solar electric marketplace in the Madison area.
It is highly ironic that the PSC would consider inflicting such a cascading sequence of perverse outcomes to a nationally recognized renewable energy program like Green Power Tomorrow. Just last month, MGE's renewable energy program received the U.S. Department of Energy's (DOE) Utility Green Power Program of the Year Award. The award was announced at the Green Power Leadership Awards banquet in Atlanta, Georgia. The honor bestowed to MGE was well-deserved, as evidenced by the letter I wrote in support of its program (see below).
Let's not wreck a good thing. Please refrain from forcing MGE to raise its premium on current and future renewable energy subscribers. Thank you.
Michael Vickerman
RENEW Wisconsin
222 S. Hamilton Street
Madison, WI 53703
Home address:
509 Elmside Blvd.
Madison, WI 53704
+++++++++++++++++
June 5, 2009
Mr. Courtney Welch
Green Power Leadership Awards
Navarro Research & Engineering for
U.S. DOE Golden Field Office
1617 Cole Blvd, MS 1501
Golden, CO 80401
Dear Mr. Welch:
It is with great pleasure that I submit this letter of support on behalf of Green Power Tomorrow, the highly popular renewable energy subscription program offered by Madison Gas & Electric. I offer this letter of support not only in my capacity as a professional renewable energy advocate, but also as a customer purchasing 100% of household electrical use through this program.
By any objective standard, MG&E's program is a hit with its customers. As reported in NREL's annual assessment of leading green power programs, Green Power Tomorrow has the second-highest customer participation rate (9.7%) among investor-owned utilities in the United States. The program ranks sixth among all utilities in sales as a percentage of total retail electricity sold (3.8%). Through a judicious blend of wind projects from the region, MG&E was able to lower its premium to one cent/kWh, which set the stage for the upsurge in customer participation in 2008. Many a Madison landmark, from the State Capitol to Monona Terrace Convention Center, is powered in part through Green Power Tomorrow.
Notwithstanding its modest premium, the program also supports customer-owned photovoltaic systems through a special buyback rate fixed at $0.25/kWh for 10 years. Called Clean Power Partners, this initiative has motivated dozens of customers to install PV on the residence or business. Last August, I became a Clean Power Partner, when the electricity from the newly installed 1.7 kW system on our house began flowing into the grid. With this installation we now produce nearly emission-free 2,000 kWh/year on top of the 4,000 kWh/yr of emission-free electricity we buy from MG&E. In the 18 months since Clean Power Partners was launched, customer participation has surpassed MG&E's initial expectations, prompting the utility to increase the ceiling on this initiative from 300 kW to one megawatt.
More than a renewable energy program, Green Power Tomorrow is a community-based sustainability initiative that supports about 50 MW of windpower that otherwise would not have been part of MGE’s resource portfolio. Instead of settling for small, incremental growth for its program, MGE elected to pursue a more ambitious path that would be appealing and affordable to a broad cross-section of its customer base, and the results are impressive. In my estimation, it is an outstanding candidate for this year's Utility Green Power Program of the Year.
Sincerely,
Michael Vickerman
RENEW Wisconsin
Monday, October 19, 2009
Educating Schools on Solar Air Heating
by Michael Vickerman
RENEW Wisconsin
October 2009
After reviewing several proposals, Focus on Energy selected two locations for showcasing this particular solar energy application.
One of the Focus on Energy-funded demonstration sites is the Cooperative Educational Service Agency, located in Chippewa Falls.
Better known as CESA 10, this agency provides energy management services to 30 school districts in northwest Wisconsin. A low-rise building with plenty of unshaded roof space, the CESA 10 office presents an ideal setting to test a solar application that could very well be a good technology fi t for the schools served by this agency.
“We hope this installation will enable us to practice what we preach,” said Todd Wanous, an energy manager at CESA 10 and the driving force behind this demonstration. Placed in service in August 2009, CESA 10’s innovative installation features Wisconsin’s first example of a modular rooftop air heating system called SolarDuct®.
On the roof are three banks of corrugated collector panels, each connected to the building’s air handling system. The dark-colored panels are covered with ventilation holes that draw in outside air. Sunlight striking the panels warms the air passing through the holes. Through the ducts running behind the arrays, ventilation fans draw the preheated air into the building’s air handling system.
CESA 10’s SolarDuct® unit is designed to supplement, not replace, the natural gas furnaces that used to be the sole source of space heat.
However, this system does not necessitate additional fans or blowers to move the preheated air throughout the building. As a result, there is no parasitic energy loss to factor in.
Continued.
This article first appeared in Sustainable Times, October 2009
RENEW Wisconsin
October 2009
After reviewing several proposals, Focus on Energy selected two locations for showcasing this particular solar energy application.
One of the Focus on Energy-funded demonstration sites is the Cooperative Educational Service Agency, located in Chippewa Falls.
Better known as CESA 10, this agency provides energy management services to 30 school districts in northwest Wisconsin. A low-rise building with plenty of unshaded roof space, the CESA 10 office presents an ideal setting to test a solar application that could very well be a good technology fi t for the schools served by this agency.
“We hope this installation will enable us to practice what we preach,” said Todd Wanous, an energy manager at CESA 10 and the driving force behind this demonstration. Placed in service in August 2009, CESA 10’s innovative installation features Wisconsin’s first example of a modular rooftop air heating system called SolarDuct®.
On the roof are three banks of corrugated collector panels, each connected to the building’s air handling system. The dark-colored panels are covered with ventilation holes that draw in outside air. Sunlight striking the panels warms the air passing through the holes. Through the ducts running behind the arrays, ventilation fans draw the preheated air into the building’s air handling system.
CESA 10’s SolarDuct® unit is designed to supplement, not replace, the natural gas furnaces that used to be the sole source of space heat.
However, this system does not necessitate additional fans or blowers to move the preheated air throughout the building. As a result, there is no parasitic energy loss to factor in.
Continued.
This article first appeared in Sustainable Times, October 2009
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