Local Examples of Residential Solar Projects

Below are project and financial information from four residential (roof-top) solar projects in Worcester. These properties participated in the Residential Rebate Pilot and installed solar systems on their homes within the last 1-2 years. As can be seen, there is a range of installed solar capacity, total project costs and incentives. (All solar installations are owned by the homeowners.)

  Project ID:    
Project Information: A B C D
Location within the City North Central North West Side
Lot Size 10,300 SF 12,600 SF 7,700 SF 5,000 SF
Home Footprint Size 1,400 SF 2,500 SF 1,600 SF 670 SF
Solar Output Capacity (kW-DC) 6.6 kW 7.14 kW 5.67 kW 4.8 kW
Total Solar Project Cost $27,000 $26,950 $26,565 $35,277***
Total Solar Project Cost per kW of solar capacity





Incentives*: State Tax Credit (Residential Renewable Energy) $1,000 $1,000 $1,000 $1,000
State Rebate (Commonwealth Solar, no longer offered) $3,250 $3,250 $3,250 $3,120
Federal Tax Credit (Residential Renewable Energy) (30%) $6,825 $6,810 $6,695 $9,347
Residential Rebate Pilot Rebate (one time offer, no longer offered) $1,174 $602 $1,979 $330
SREC Value** - income estimated over 10 Years $13,576 $14,687 $11,663 $9,874
Total Incentives $25,827 $26,348 $24,586 $23,670

Final Cost to the Owner





*Please note that for a full picture of an economic advantage of having a solar system, one would also have to consider savings from avoided electrical costs and potential income from net-metering credits (when/if electrical generation exceeds electrical consumption). You can request this information from a solar company when seeking estimates.

**SRECs income can come in over a 10-year period (which typically is more advantageous as it allows one to sell them at the peaks of the market) or can be paid out as a lump-sum. For this table, it was assumed that 1 kW of solar capacity (i.e. panels) would generate approximately 1,200 kWh of electricity per year. 1 SREC = 1,000 kWh.

***The comparatively higher cost of this project included significant roof repairs needed in order to prepare it for the installation.

One Worcester resident reported that as a result of his solar project, his home's electricity bill has decreased from an average monthly bill of $101 to just $4!  

Another Worcester resident who installed a solar system on her home said it was "one of the best decisions I have ever done economically in my life," adding that she no longer has to pay an electric bill, and is actually accruing credits through net metering.

A residential roof-top solar project in Worcester