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FLAT Rate Structure

Solar ROI for National Grid Massachusetts Customers

National Grid Massachusetts charges an average of $28.5¢/kWh. A 7 kW solar system produces a $27,509 NPV over 25 years.

$13,945
Net System Cost
$27,509
25-Year NPV
6 years
Payback Period
$0.170/kWh
Solar LCOE

National Grid Massachusetts Rate Structure

ParameterRate
Average residential rate$28.5¢/kWh
Rate structureFLAT
Export credit policy1:1 NEM with SMART incentive program

Solar System Economics

A 7 kW solar system for a National Grid Massachusetts customer costs $21,350 before incentives. The 30% federal ITC saves $6,405, and the Massachusetts state credit adds $1,000. The net out-of-pocket cost is $13,945.

At National Grid Massachusetts's $28.5¢/kWh average rate, the system saves $2,434 in year one, producing 8,540 kWh. The solar LCOE of $0.170/kWh is 40% below National Grid Massachusetts's current rate.

Battery Storage for National Grid Massachusetts Customers

$8,400
Battery Net Cost
$0
Daily Arbitrage
$0
Annual Arbitrage
-$11,382
25-Year Battery NPV

National Grid Massachusetts uses a flat rate structure without significant peak/off-peak spread. Battery value comes primarily from backup power and net metering optimization rather than TOU arbitrage.

FAQ: Solar for National Grid Massachusetts Customers

How much can National Grid Massachusetts customers save with solar?
A typical 7 kW solar system saves National Grid Massachusetts customers approximately $2,434/year in electricity costs. Over 25 years, the NPV of savings after system costs is $27,509.
What is National Grid Massachusetts's rate structure?
National Grid Massachusetts uses a flat rate structure at an average of $28.5¢/kWh. Without a large peak/off-peak spread, battery storage value comes primarily from backup power and net metering optimization.
Does National Grid Massachusetts offer net metering?
1:1 NEM with SMART incentive program
Should National Grid Massachusetts customers add battery storage?
Battery storage for National Grid Massachusetts customers has a 25-year NPV of -$11,382. The economics are marginal based on TOU savings alone, but backup power value and future grid services programs may change the equation.

Other Utilities in Massachusetts

Eversource Massachusetts
$27.8¢/kWh · FLAT
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