Battery Storage vs Generator in Massachusetts
Both provide backup power, but batteries offer Massachusetts-specific incentives (ConnectedSolutions, 30% ITC) that can cut net costs by 50%+. Here's the full comparison.
Side-by-side comparison
| Home Battery | Standby Generator | |
|---|---|---|
| Installed cost | $12,000–$18,000 | $8,000–$18,000 |
| Federal incentive | 30% ITC (25D) — ~$3,600–$5,400 | None |
| Utility incentive (MA) | ConnectedSolutions: $1,500–$3,500/yr | None |
| Net cost after 3 years | ~$2,000–$10,000 est. | $8,000–$18,000 |
| Backup duration | ~8–16 hrs (essential loads) | Unlimited (has fuel) |
| Backup power type | Essential circuits only (typical) | Whole home (typical) |
| Fuel required | No — charges from solar or grid | Natural gas or propane |
| Annual operating cost | ~$0 (no fuel) | $300–$800 (fuel + maintenance) |
| CO₂ emissions | Zero (grid/solar charged) | High (combustion) |
| Noise during outage | Silent | Loud (outdoor unit) |
| Response time | Milliseconds (instant) | 10–30 seconds |
| Permitting required | Yes — electrical | Yes — electrical + gas/propane |
The ConnectedSolutions incentive explained
ConnectedSolutions is a demand response program run by Eversource and National Grid in Massachusetts. Your battery is enrolled to discharge during grid stress events (typically summer afternoons, 3–8pm) in exchange for annual payments.
Payments vary by year and utility but have historically been $1,500–$3,500/year for a 10–13 kWh battery. Over 5 years, this can exceed the federal ITC value, dramatically improving the battery ROI.
During program events (typically 15–20 per summer, 2–4 hours each), the battery may discharge to support the grid. The program doesn't prevent you from using it for backup — you can opt out of any event. Your installer can configure reserve capacity for backup.
As of 2023, standalone batteries (not paired with solar) qualify for the 25D residential clean energy credit at 30%. This applies to the battery and installation cost. Consult a tax professional to confirm eligibility for your specific situation.
When to choose a generator instead
A standby generator makes more sense if you need multi-day whole-home backup (e.g., well pump, sump pump, medical equipment, electric heat), you are in an area with frequent extended outages, or you already have a natural gas connection. Batteries are limited to 8–16 hours of essential loads. For extended outage coverage, a generator (or generator + battery hybrid) may be the right answer.
Use the solar payback calculator to estimate combined system ROI and federal ITC.