A Typical 13.5 kWh Battery in Maine
Backup, cost, and time-of-use bill savings
Installed Cost
$15,500
State Rebate
-$1,500
Net Cost
$14,000
Backup (essentials)
15 hrs
Avg Outages
12 hrs/yr
Bill Savings/yr
$399
Bill-Savings Payback
35.1 yrs
15-Year Savings
-$6,577
Maine Battery Rebates
✕
Federal 25D Credit (Expired Dec 31, 2025)
The 30% federal Residential Clean Energy Credit covered standalone home batteries through December 31, 2025. Batteries installed in 2026 no longer qualify.
Up to $1,500
Maine State & Utility Programs
Maine's Efficiency Maine offers battery incentives (~$1,500), and frequent storm outages make backup valuable. View full rebate detail →
Battery Backup & Savings by City in Maine
| City | Bill Savings/yr | Outage Hrs/yr | Population ↓ | Utility |
|---|---|---|---|---|
| Portland | $395 | 11 hrs | 68,408 | Central Maine Power |
| Lewiston | $383 | 14 hrs | 36,592 | Central Maine Power |
| Bangor | $415 | 13 hrs | 32,640 | Emera Maine |
| South Portland | $419 | 9 hrs | 25,404 | Central Maine Power |
| Auburn | $419 | 15 hrs | 23,055 | Central Maine Power |
| Biddeford | $399 | 15 hrs | 21,277 | Central Maine Power |
| Sanford | $403 | 10 hrs | 20,463 | Central Maine Power |
| Saco | $419 | 14 hrs | 19,919 | Central Maine Power |
| Westbrook | $443 | 13 hrs | 19,079 | Central Maine Power |
| Augusta | $379 | 10 hrs | 18,560 | Central Maine Power |
Home Battery Savings Calculator
Instant estimate — no email required
A typical home battery (e.g. a Tesla Powerwall) is ~13.5 kWh.
Quick Facts: Maine
- 🔌 Avg outages: 12 hrs/yr
- ⚡ Electricity: $0.198/kWh
- 📊 Peak/off-peak gap: $0.10/kWh
- 🏭 Top utility: Central Maine Power