Monthly Savings
$0
California Solar Tool
Solar Savings Calculator
Estimate monthly and annual bill savings from rooftop solar and optional battery storage using California utility rates.
Why Solar in California?
- High electricity rates - CA utility averages: Loading utility averages...
- Strong solar resource - assumptions use 5.5 peak sun hours/day statewide average
- Federal tax credit - 30% ITC is applied in payback estimate (through 2032)
- NEM 3.0 environment - export credit modeled at 75% of retail rate with battery boost
- Data update - utility dataset version: 2026-02-19
Your Solar System
Your Current Bill
Estimated Savings
Annual Savings
$0
Payback Period
- yrs
Bill Offset
0%
Monthly Production
0 kWh
Self-Consumed
0 kWh
Exported to Grid
0 kWh
Estimated new monthly bill:
$0
How solar savings are estimated
The solar model converts system size into expected production, then translates production into bill impact under California-style billing assumptions. Monthly PV output is estimated from system kW, average peak-sun-hours, and system loss factors. Savings are then split into self-consumed energy value plus exported energy credit (with lower export value assumptions under current net billing context). If battery capacity is added, the model increases self-consumption and reduces lower-value exports, which is why storage can improve savings even when total solar production is unchanged.
A practical reference case is a household with about a $250 monthly bill and a 6 kW rooftop system: bill reduction often becomes meaningful, while payback depends on utility rate level, battery size, and install cost after incentives. Choosing your utility matters because average retail rates differ significantly across territories, so address- and utility-aligned inputs produce better screening results than a statewide flat assumption. Use this calculator to compare scenarios quickly before requesting installer-specific proposals.