California solar decisions
California solar bill and quote calculator
What does the quote actually change? Start with your bill, add the proposal’s numbers, and see the arithmetic before sharing any contact details.
Updated September 10, 2026 · California Rate Relief is a private solar referral service.
Check the numbers in your bill and quote
Start with your electricity bill. If you have a quote, add its system size, cash price and remaining utility bill. Leave unknown values blank. After changing values, calculate again to update the optional inquiry.
What this tool can answer
It annualizes your bill, separates solar price per watt from battery cost and checks a quoted remaining utility bill against what you currently pay. It does not select a system size or predict rooftop production. Use the installer’s monthly production model and an address-specific assessment for that.
Put the quotes on the same basis
A smaller monthly payment can hide a longer contract, less equipment or a larger remaining electric bill. Ask each bidder to fill the same gaps.
| Compare | Get it in writing |
|---|---|
| System and output | Same DC system size, module/inverter models and roof layout; monthly production with shading and losses shown. |
| Battery and backup | Usable kWh, continuous output, backed-up circuits, reserve setting and expected replacement costs. |
| Price and scope | Separate solar, battery, roof, panel upgrade, permits and interconnection. Compare cash prices before financing. |
| Utility bill | Same usage history and tariff; separate onsite use, grid imports, export credits and remaining fixed/delivery charges. |
| Contract and service | Who installs and who services it; written coverage by address, insurance, license record, exclusions and warranty claim process. |
| Payment and transfer | Cash, loan, lease or PPA; upfront costs, APR or escalator, total payments, home-sale and end-of-term terms. |
Want to discuss your solar options?
Send your project details to California Rate Relief. We collect the information for a solar referral; the provider confirms availability, design and price. The calculator and checklist are yours to use without submitting.