A Typical 13.5 kWh Battery in Hawaii
Backup, cost, and time-of-use bill savings
Installed Cost
$16,000
State Rebate
-$850
Net Cost
$15,150
Backup (essentials)
15 hrs
Avg Outages
5 hrs/yr
Bill Savings/yr
$599
Bill-Savings Payback
25.3 yrs
15-Year Savings
-$4,015
Hawaii 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 $850
Hawaii State & Utility Programs
Hawaii's Battery Bonus pays ~$850/kW for adding storage plus grid-export revenue — and the nation's highest rates make arbitrage valuable. View full rebate detail →
Battery Backup & Savings by City in Hawaii
| City | Bill Savings/yr | Outage Hrs/yr | Population ↓ | Utility |
|---|---|---|---|---|
| Honolulu | $587 | 4 hrs | 347,397 | Hawaiian Electric |
| East Honolulu | $531 | 4 hrs | 49,914 | Hawaiian Electric |
| Pearl City | $599 | 6 hrs | 47,698 | Hawaiian Electric |
| Hilo | $679 | 6 hrs | 44,186 | Hawaii Electric Light |
| Kailua | $615 | 4 hrs | 38,635 | Hawaiian Electric |
| Waipahu | $651 | 6 hrs | 38,216 | Hawaiian Electric |
| Kaneohe | $611 | 4 hrs | 34,597 | Hawaiian Electric |
| Mililani | $515 | 4 hrs | 27,629 | Hawaiian Electric |
| Kahului | $523 | 5 hrs | 26,337 | Maui Electric |
| Ewa Beach | $519 | 4 hrs | 24,689 | Hawaiian Electric |
Home Battery Savings Calculator
Instant estimate — no email required
A typical home battery (e.g. a Tesla Powerwall) is ~13.5 kWh.
Quick Facts: Hawaii
- 🔌 Avg outages: 5 hrs/yr
- ⚡ Electricity: $0.280/kWh
- 📊 Peak/off-peak gap: $0.15/kWh
- 🏭 Top utility: Hawaiian Electric