The average home in Massachusetts consumes about 8,000 kilowatt-hours per (kWh)
year. You can determine your annual electricity use by looking at your electricity
bill and totaling the kWh that you use each month for a year. Typically this information
is located on the lower left corner of your electricity bill.
Assuming an average Massachusetts residential consumption is 8,000 kWh/year and a default electricity
rate of $0.18 / kWh (including taxes and fees), the following electrical savings may be achieved with
a typical PV system under optimal conditions.
|
System
|
Size Estimated Optimal
Annual Generation (kWh)
|
Estimated Annual Savings
|
Estimated Savings over 25-year life of system
|
|
2 kw
|
2400
|
$432
|
$10,800
|
|
3 kw
|
3600
|
$648
|
$16,200
|
|
4 kw
|
4800
|
$864
|
$21,600
|
|
5 kw
|
6000
|
$1,080
|
$27,000
|
____*Does not account for increases in electric rates._________________________________