A Typical 13.5 kWh Battery in Connecticut
Backup, cost, and time-of-use bill savings
Installed Cost
$16,000
State Rebate
-$1,800
Net Cost
$14,200
Backup (essentials)
15 hrs
Avg Outages
8 hrs/yr
Bill Savings/yr
$798
Bill-Savings Payback
17.8 yrs
15-Year Savings
$647
Connecticut 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 $1,800
Connecticut State & Utility Programs
Connecticut's Energy Storage Solutions restructured on April 1, 2026: a smaller upfront enrollment incentive ($30–$130 per kWh) plus performance payments of $300–$550 per kW each year for 10 years. View full rebate detail →
Battery Backup & Savings by City in Connecticut
| City | Bill Savings/yr | Outage Hrs/yr | Population ↓ | Utility |
|---|---|---|---|---|
| Bridgeport | $918 | 9 hrs | 148,654 | Eversource CT |
| Stamford | $902 | 10 hrs | 135,470 | Eversource CT |
| New Haven | $878 | 9 hrs | 130,250 | United Illuminating |
| Hartford | $742 | 7 hrs | 121,054 | Eversource CT |
| Waterbury | $830 | 7 hrs | 113,706 | Eversource CT |
| Norwalk | $794 | 7 hrs | 91,184 | Eversource CT |
| Danbury | $842 | 10 hrs | 84,714 | Eversource CT |
| New Britain | $886 | 9 hrs | 72,939 | Eversource CT |
| West Hartford | $798 | 7 hrs | 63,268 | Eversource CT |
| Greenwich | $854 | 6 hrs | 62,396 | Eversource CT |
Home Battery Savings Calculator
Instant estimate — no email required
A typical home battery (e.g. a Tesla Powerwall) is ~13.5 kWh.
Quick Facts: Connecticut
- 🔌 Avg outages: 8 hrs/yr
- ⚡ Electricity: $0.235/kWh
- 📊 Peak/off-peak gap: $0.20/kWh
- 🏭 Top utility: Eversource CT