Phyllis Theermann

There are many things you can do.

1. Complete a Sustainable Wellesley Checklist (Whether you live in Wellesley or not!)

2. Get a free home energy assessment ☀ Call 888-772-4242 in Wellesley. ☀ Visit (all towns).

3. Buy Green/Renewable Electricity ☀ Visit or call 781-235-7600 in Wellesley. ☀ Visit (NSTAR and National Grid customers).

Want to do More? Click on these links:

What Can My State Do?

What Can My Country Do?

Phyllis Theermann

Did you know?

  • Solar is less expensive than retail electricity before incentives in many cases today!

Average cost of system installed in MA over last year = $3.52/W[1] (utility, commercial and residential), which results in an approx. levelized cost of energy of 12.4 cents/kWh over the 25 year warranted life of the system.

  • The solar industry employs over 119,000 people – more than the coal industry, and is one of the fastest growing industries in the US.[2]
  • $22 of incentives go to the fossil fuel industries for every $1 of subsidies that go to renewable energy.[3]
  • Over 70% of the net additions to the world’s electric grids were renewables last year.[4]
  • The costs for solar panels have fallen by over 60% in the last year and a half.[5]
  • Residential systems in MA typically pay back in 6 years.

Environmental Benefits[6]

Typical 6kW system saves 5 tons of CO2 annually – this is about 18% of the carbon footprint of a typical family in Wellesley (assumes 4 family members, nat. gas heating, 2 cars with 240 miles/mo. and 20.4 mpg, recycles most waste)

Equivalent to:

  • Removing 1 car from the road
  • Planting 1 acre of pine or fir forest
  • Recycling 1.8 tons of waste instead of sending it to a landfill

Cost of Solar

Avg. residential system size in MA:  6kW (would supply about 2/3 of the average Wellesley home’s electric usage)

Cost for avg. residential system in MA last quarter: $4.41/W[7], or             $26,500

Commonwealth Solar II Rebate:                                                              ($2,000)
Federal 30% Investment Tax Credit:                                                        ($7,950)

MA Tax Credit:                                                                                      ($1,000)

Net System Cost:                                                                                   $15,500

Annual Electricity Savings @ 12.6₵/kWh:                                                  $850
($29,000 over 25 year life of system, assuming 3% annual electric rate growth)

Annual Solar Renewable Energy Certificate (SREC) Income:                       $1,900 – $3,700 ($19,000 – $30,000 over 10 years)

15% return on investment, about a 6 year payback

Financing Options

Power Purchase Agreement (PPA) – zero cost initial investment, plus buying electricity at lower cost from solar array owner

Solar Lease – zero to minimal cost initial investment, savings on electricity, plus lease payments to solar array owner

How to Start

  1. See if you have a roof face that faces mostly south
  2. Check for shading (if no or limited shading at noon in mid-winter you’re probably in good shape)
  3. Go to (Massachusetts Clean Energy Center) and search “Finding a Solar Installer” or contact me, Alex Keally –, 617-217-1502. 

References below

[1] “SRECs Minted and MWh reported to the PTS,” Updated January 15, 2013, filtered for systems with Commercial Operation Date in 2012 or 2013, Massachusetts Department of Energy Resources,

[2] “National Solar Jobs Census 2012,” The Solar Foundation,

[3] Bill Clinton, Keynote speech at Solar Power International, September 12, 2012, Orlando, FL

[4] REN21, 2012. “Renewables 2012 Global Status Report,” Table R1,

[5] GTM Research, “US Solar Market Insight – Q3 2012”

[6] Environmental Benefits from US Environmental Protection Agency, Greenhouse Gas Equivalency Calculator,

[7] Massachusetts Clean Energy Center, “Commonwealth Solar Summary Report,” Block 12 – Rebate Awarded

Phyllis Theermann

energy action

Pick your means to energy reduction

Get your Wellesley Energy Action Guide here

Simple actions can reduce your household’s green house gas emissions 50% over 5-10 years.