Our solar panels have been a critical component of getting our home to a zero carbon footprint.
- David G.
- Single-Family Residence
- Dover, MA 02030
- 5,400 sq ft
- Zero net energy
- Solar PV
- December 2016
- Size of System:
- 15 kW
- Monitor performance:
- To generate electricity
- Gross Cost of System:
- Value of Rebates:
- Value of Tax Credits:
- Net Cost of System:
- Annual Savings:
- Annual Revenue:
- Own or Lease:
- Cash Purchase
- Additional Financial Notes:
- IRR (internal rate of return, fancy finance term for return on investment) is 9% after tax and with no volatility. Net present value (another fancy finance term that means how much money did you make) is about $23,000. the panels pay for themselves in about 8 years. It generates power at 8c per kWh, far lower than our utility which charges 22c per kWh. The second array generates power at 3c per kWh I have now installed a second array that pays for itself in about 6 years with a 17% IRR after tax.
Professionals & Suppliers
- New England Clean Energy
What You Need to Know
15 kW system. 46 x Sunpower 345W panels through two Solar edge inverters mounted flat on a flat roof
We feel good about the lower carbon footprint as we replaced our furnace with a heat pump that is now driven by our zero carbon solar panels
One panel was replaced under warranty and another one was re-wired under warranty. In the first year I shoveled snow off the panels but did not bother in the second year
Efficiency or Sustainability Improvements:
2 x Bosch 5 ton whole house heat pumps (ducted) State heat pump hot water tank Insulation on roof and ceiling of basement Loewen triple glazed windows and patio doors. u-factor is 0.2 - 0.25 or R-value of R4-R5 which is very good for windows All with FSC wood
To get to a zero carbon footprint and make money doing so. See the whole story here: www.greenzerocarbonhome.com
I bought the first array on my own after doing a ton of research. I bought the second array through the Energy Sage comparison tool. I found it very good as i got 4 bids and they were all compared on the same financial basis including calculating the cost per kilowatt hour, IRR, and payback period.
Experience with Installer:
NECE was very good. Expensive but they had good technical people and good administrative people which is actually vital as you need permits from everyone, and forms galore.
With the extra insulation, triple-glazed windows and heat pumps I have reduced the energy use of my house so much that I can generate all that energy form solar panels on my roof. This gets my house to a zero carbon footprint. I am making money on it too. I have written a book about the whole process so that I can spread the word. You can read about it here: www.greenzerocarbonhome.com
Open House Info:
you can email me at email@example.com
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