Estimate your monthly electric bill after solar with usage, production, retail rates and fixed charges. Compare annual energy netting and remaining grid costs.
Quick answer
Bill = purchased energy cost + fixed charges - eligible export credits, subject to the selected bill floor.
Notes updated 2026-10-07
Author profile: Marcus Vance . Read the methodology and recheck local tariff, quote, and incentive details before deciding. Attribution is not a record of independent technical review.
Editable planning assumptions, not a verified utility tariff. Confirm export settlement and fixed charges on your account. This is an annual energy model, not an hourly bill forecast.
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Generated 10/25/2026 · Verify assumptions with your utility and installer.
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Fixed charges, minimum bills and non-bypassable fees can remain even with enough annual production. This calculator applies an annual energy balance and a fixed-charge floor; it does not reproduce every bill line.
No. Monthly generation, heating loads and settlement rules vary. Use this result for annual planning and verify seasonal and hourly charges against your utility schedule.
Usually yes if you stay grid-connected. Customer charges, non-bypassable items and energy bought when solar is unavailable can remain. A 100% annual energy offset does not mean every monthly bill is zero.
| Solar production | Current average bill | Average bill after solar |
|---|---|---|
| 6,000 kWh/year | $215.00 | $115.00 |
| 10,000 kWh/year | $215.00 | $48.33 |
| 12,000 kWh/year | $215.00 | $15.00 |
Illustrative assumptions: 12,000 kWh/year household usage, $0.20/kWh energy rate and $15/month fixed charge. Annual retail netting with the bill floored at the fixed charge. These monthly numbers are annual averages, not forecasts of seasonal bills or net-billing accounts.
Example and calculation notes updated . Method references are listed below; example rates are not verified utility tariffs.
Bill = purchased energy cost + fixed charges - eligible export credits, subject to the selected bill floor.
Using 10,000 kWh/year at $0.20 and a $15 monthly fixed charge, the model returns a $181.67 average monthly bill. Under annual netting, 8,000 solar kWh reduce it to $48.33. Actual monthly settlement and minimum bills may differ.
Reproducible example generated from the same calculator functions used by the tool. Inputs are illustrative, not measured customer results.
Monthly bills are annual averages; taxes, demand charges, minimum bills and hourly settlement need your utility schedule.
Use your bill or written equipment quote, run a conservative scenario, and compare the result with the same inputs in another model.
Calculation notes updated 2026-10-07. Reference links explain the method; they do not establish a current utility tariff or installer price.
Read the full methodology or save and compare your solar plan.
Treat the result as a planning range, not a promise. Re-run it with a lower and higher production estimate, your actual utility tariff, and the written installer quote.
Use the method references below to check the formula and its limitations. Input defaults and illustrative scenarios are not current tariffs, guaranteed output or live installer quotes.
Utility export rates, eligibility rules, and installer pricing can change. Confirm the applicable tariff, interconnection requirements, and tax treatment before making a purchase decision.
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Start with your actual usage, equipment or quote inputs, keep the displayed units, and change one assumption at a time. Monthly bills are annual averages; taxes, demand charges, minimum bills and hourly settlement need your utility schedule.
Bill = purchased energy cost + fixed charges - eligible export credits, subject to the selected bill floor.
Using 10,000 kWh/year at $0.20 and a $15 monthly fixed charge, the model returns a $181.67 average monthly bill. Under annual netting, 8,000 solar kWh reduce it to $48.33. Actual monthly settlement and minimum bills may differ.
Monthly bills are annual averages; taxes, demand charges, minimum bills and hourly settlement need your utility schedule.
Physical kW and kWh calculations use the same units internationally. Dollar results, regional defaults, emissions factors, incentives and utility guidance are US-oriented. Replace rate and production assumptions with local values; do not apply US tax or export rules abroad.
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