PV Solar installed Dec 2011. Another profile (same house): Energy audit completed June 2012 with $2,454 rebate from efficiency vermont, siding and re-insulation completed September 2012.
$1,036
100%
or more of electricity
$20,625
7.2%
Property
- Owner:
- Henry Bonges
- Type:
- Residential
- Address:
- 5 Jackson Ln, Milton, VT 05468
- Size:
- 1,950 sq ft
- Energy need met:
- 100% or more of electricity
- Designations:
- Deep energy retrofit
- Zero net energy
- Event Participation:
- NESEA Green Buildings Open House 2012 Host
- NESEA Green Buildings Open House 2013 Host
Technology
- Type:
- Solar PV
- Installed:
- January 2011
- Size of System:
- 7.5 kW
- Purposes:
- To generate electricity
Financial Details
- Gross Cost of System:
- $37,500
- Value of Rebates:
- $5,625
- Value of Tax Credits:
- $11,250
- Net Cost of System:
- $20,625
- Annual Savings:
- $1,036
- Annual Revenue:
- $444
- Own or Lease:
- Cash Purchase
Professionals & Suppliers
- Installers:
- Building Energy
- Financing:
- self
- Builders:
- Nicholas Ponzio, Building Energy, 802-365-1973
- Energy Auditors:
- Andrew Hathaway, Building Energy, 802-859-3384
What You Need to Know
Description:
7.5-Kilowatt Solar Electric Power System: (30) Solar PV Modules, SolarWorld 255-Watt ea. (2) Inverters SolarEdge SE3800US & SE5000US with Module MPPT and Data Monitoring (30) SolarEdge PowerBox DC Power Optimizers, SB250-AOB AC & DC Disconnect Switches
Other Benefits:
Realized savings are higher than expected, projecting closer to 9MWh vs the 7.4 spec'd. I realize PV solar will lose some efficiency over time, and I have not done any insolation modeling to see if this is "just a good year". I will at the end of the year. We also changed the oven and range from propane to electric. The induction stove is fantastic. I may expand the system it for an electric car if i can do it economically.
Maintenance Requirements:
In winter I sometimes snow rake the panels as the roof has a shallow pitch. The snow has naturally come off better than expected for that pitch.
Efficiency or Sustainability Improvements:
In another profile (same house): Energy audit and work completed June 2012 with $2,454 rebate from efficiency vermont. House (built in 1984) resided, which gave us the opportunity to seal the insulation bays and change insulation to StoneWool. Completed September 2012.
My Motivation:
Economics of saved energy dollars. Refinishing the house on a "permanent" basis, no major work will be needed for a loooong time, environmental concerns.
Experience with Installer:
Very good.
Links:
View Other Case Studies
Search for Other Case StudiesThe EnergySage Marketplace