Planning with U.S. state data and USD. Translations do not change the market or currency.
No phone number. No signup. Estimate first.
Run a solar estimate before any quote request. SolarCalcNow shows system size, panel count, roof space, gross cost, savings, payback, and assumptions without making you talk to a sales team first.
No email required
Enter monthly kWh or electric bill. The calculator uses state-level assumptions and shows the math behind the result.
Your estimate
Example resultEstimated system size: 6.8 kW. This is an estimate, not an installer quote.
Confidence
Medium
Planning estimate only — not an installer quote, engineering design, or tax advice.
Payback uses gross system cost before verified incentives, financing fees, batteries, and roof work.
Annual usage: 10,800 kWh
Annual production target: 10,800 kWh
State rate: 33.61 cents/kWh
Export assumption: Partial export credit
Direct solar use: 5,940 kWh
Modeled exports: 4,860 kWh
Panel count view
15-19 panels
Estimate shape
Privacy note: the printable report link stores estimate inputs in the URL, including ZIP and usage or bill values. Keep it private if those details are sensitive.
Monthly shape comes from the PVWatts AC reference model, scaled to this annual estimate. Losses are already included. This is a seasonal planning illustration, not a roof or ZIP model. Monthly balances do not measure imports, exports or bill credits; those need interval matching and tariff rules.
Consumption repeats the entered monthly average. Enter 12 months above to see seasonal demand.
| Month | Usage | Production | Production − usage | |
|---|---|---|---|---|
| Jan | 900 | 575 | -325 | |
| Feb | 900 | 644 | -256 | |
| Mar | 900 | 910 | +10 | |
| Apr | 900 | 996 | +96 | |
| May | 900 | 1,111 | +211 | |
| Jun | 900 | 1,142 | +242 | |
| Jul | 900 | 1,187 | +287 | |
| Aug | 900 | 1,124 | +224 | |
| Sep | 900 | 1,031 | +131 | |
| Oct | 900 | 868 | -32 | |
| Nov | 900 | 667 | -233 | |
| Dec | 900 | 545 | -355 | |
| Annual usage | 10,800 | 10,800 | 0 |
Local scenarios
Compare a few assumptions without creating an account.
Saved scenarios stay in this browser only and may include ZIP, bill, and usage inputs. SolarCalcNow does not sync them or send those values to analytics.
No saved scenarios yet.
Confidence drivers
Expected production: 10,800 kWh
System loss: 14%
Export value: Partial export credit
Direct solar use: 5,940 kWh
Modeled exports: 4,860 kWh
State production default: 1,595 kWh/kW/year
EIA Electric Power Monthly, Table 5.6.A — July 2026 - 2026-09-30
NLR PVWatts V8 · author-selected reference point - 2026-09-04
EnergySage marketplace + SolarCalcNow cost scenario - 2026-09-04
Production evidence: California has a saved full PVWatts response; eight states have successful API yields recorded to two decimals. Colorado, Illinois and Pennsylvania retain explicit author assumptions. The download distinguishes these evidence levels.
$0.3361/kWh
33.61 ¢/kWh
EIA Table 5.6.A, July 2026 residential column; published September 24, 2026. Divide the published cents/kWh by 100. This preliminary statewide average is a fallback, not your utility tariff. Use your bill's energy-only rate; fixed charges remain payable.
1,595.2 kWh/kW/year
kWh/kW/year
PVWatts V8 typical-weather model at an author-selected reference point in the state: 4 kW DC, roof mount, 20° tilt, 180° azimuth, 14% system losses. Annual AC kWh ÷ 4 gives kWh/kW/year. Losses are already included and are not deducted again. Neither a statewide average nor a ZIP or roof survey. Shade and ±10% production bounds are separate author scenarios.
$1.98–$2.98/W
$2.48/W × 0.8…1.2
EnergySage's state marketplace average, table updated August 28, 2026. We calculate an author-selected range of average × 0.8 to average × 1.2, rounded to cents/W. This ±20% scenario is not an observed price distribution or confidence interval. Cash solar only, before incentives; compare like-for-like local quotes.
SolarCalcNow provides planning estimates only. Results are not installer quotes, engineering designs, tax advice, financing recommendations, or utility interconnection approval.
Optional next step
Your estimate stays visible. This form is optional and uses explicit consent.
Installer quote matching is not active yet. You can still calculate, save, and print your estimate before contacting installers directly.
The main result appears before any optional quote CTA. You can use the calculator for planning without submitting a lead.
The estimate shows rate, production, cost, export-value, and confidence assumptions instead of hiding the math.
Save a printable report, check incentives, compare an installer quote, or leave. The quote form is not required.
Contact stays optional
Some solar estimate flows are also installer-matching or quote-request services. In that context, a phone number can support follow-up, but it is not an input to the basic system-size calculation. Monthly kWh, location, shade, panel wattage, and an offset target are the planning inputs that affect this estimate.
SolarCalcNow shows the planning result before its optional quote request. Read the privacy terms before using any contact form, and submit only when you intentionally want follow-up. The calculator itself does not need an email or phone number to display the estimate.
Read the no-phone estimate guideAfter you have a no-phone estimate, save the report, review incentive status, and compare any installer quote against the same assumptions.
Public tools checked September 30, 2026
A free estimate without contacts is available from more than one provider. Compare the inputs, assumptions and next step. Public descriptions below do not establish the full signup or quote-request experience.
Planning before a quote
Contact-free estimate, editable export value and self-use, 12-month consumption, a California seasonal reference, printable results and quote checks. State assumptions are visible; no verified roof survey or current installer offer.
Location and production planning
The public calculator displayed a result without contacts in our check. Its page describes location, roof inputs and PVWatts production. Verify the assumptions for your address and tariff before treating an output as a quote.
Address-based planning and installer comparison
Its public page describes address, property type and bill inputs, followed by a quote marketplace. Read the data and contact terms when proceeding into installer matching; that later flow was not completed in this check.
Ownership and financing comparison
The public tool presents cash, loan, lease and PPA scenarios on common assumptions. Use actual contract terms and matching equipment scope when comparing total payments.
Gather 12 months of kWh, your utility rate plan and fixed charges, roof/shade notes, and any quote's DC system size and matching cash price. An address is useful for a site model; a phone number is not part of the system-size math.
Find the inputs on your utility bill