1200 kWh/month preset

Solar Calculator for 1200 kWh per Month

Start with 1200 kWh/month pre-filled for higher-usage home planning.

Use this preset for higher-usage homes where larger system size, roof space, and export assumptions can change the recommendation quickly.

Estimate firstNo email gateSources linked

Estimate preview

Panels, cost, savings

System size7.8 kW

Payback window5-7 yr

ConfidenceHigh

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Estimate solar for 1200 kWh/month

Enter monthly kWh or electric bill. The calculator uses state-level assumptions and shows the math behind the result.

Monthly usage, kWhMonthly bill, $

Planning for new electric loads?

Add a simple monthly usage placeholder before sizing solar. Replace it with your actual bill or device estimate when you have it.

Need more than a placeholder? Calculate EV charging from annual miles and efficiency, then compare current and future solar size. Plan EV and other future home loads

StateZIP codeRoof typeUsed for planning context only; roof type does not change sizing or cost math without a site-specific quote.

ShadePanel wattsOffset target

Export valueAdvanced planning input. Your utility may use different net metering, net billing, or export-credit rules.Direct solar use

55%

Share of annual solar production used in the home before export. Replace this planning assumption with interval data when available.

Your estimate

Example result

You likely need 25-29 panels

Estimated system size: 10.5 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.

Estimated system size: 10.5 kW; Sized for your target offset and system loss assumption.
Likely panel count: 25-29; Centered around 27 panels at 400W equivalent.
Roof space: 652 sq ft; Includes a spacing factor, not a final layout plan.
Annual production: 14,400 kWh; Modeled first-year output at the selected offset; not a production guarantee.
Gross cost: $24,593 - $31,919; Before verified incentives, financing, or battery costs.
Gross cost per watt: $2.35 - $3.05; Before incentives. Useful for comparing installer quotes.
Annual savings: $3,591; Based on state residential rate and self-consumption assumption.
Payback: 6.8 years - 8.9 years; Simple gross-cost payback estimate.

Annual usage: 14,400 kWh

Annual production target: 14,400 kWh

State rate: 35.25 cents/kWh

Export assumption: Partial export credit

Direct solar use: 7,920 kWh

Modeled exports: 6,480 kWh

Panel count view

25-29 panels

Estimate shape

Production, savings, and payback

Annual production target14,400 kWh

Annual savings$3,591

Payback6.8 years - 8.9 years

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Assumptions behind this estimate

California state-level electricity rate and solar production defaults are used.
100% bill offset target.
400W solar panels.
14% system loss assumption.
Roof area uses about 21 sq ft per panel plus spacing factor.
Gross cost range excludes verified incentives, financing, batteries, roof work, and panel upgrades.
55% of annual solar production is modeled as directly used before export.
Export value assumption: Partial export credit.
Savings are energy-only and exclude fixed charges, minimum bills, demand charges, and time-of-use detail.
You provided monthly kWh usage.
State production defaults are used for this estimate.

Confidence drivers

Overall confidence: Medium.
You provided monthly kWh usage.
State production defaults are used for this estimate.

Expected production: 14,400 kWh

System loss: 14%

Export value: Partial export credit

Direct solar use: 7,920 kWh

Modeled exports: 6,480 kWh

State production default: 1,600 kWh/kW/year

SolarCalcNow provides planning estimates only. Results are not installer quotes, engineering designs, tax advice, financing recommendations, or utility interconnection approval.

Optional next step

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Installer quote matching is not active yet. You can still calculate, save, and print your estimate before contacting installers directly.

SolarCalcNow provides planning estimates only. Results are not installer quotes, engineering designs, tax advice, financing recommendations, or utility interconnection approval.

Real baseline

What the calculator returns for 1200 kWh/month

Same inputs, different state data: 400 W panels, 1200 kWh/month, low shade, 100% offset target, partial export credit, and no ZIP-level PVWatts override. This makes the state-rate and production assumptions visible before a quote.

State	System	Panels	Gross cost	Payback
California	10.5 kW	25-29	$24,593-$31,919	6.8 years-8.9 years
Texas	11.2 kW	26-30	$26,233-$34,605	15.2 years-20.0 years
Massachusetts	13.4 kW	32-36	$36,837-$48,893	12.3 years-16.3 years

Methodology first

1200 kWh/month fits higher-usage homes

Read methodology

1200 kWh per month often fits larger homes, all-electric households, home offices, pools, or regions with heavier cooling load.

Higher usage usually increases system size and gross cost, but it can also improve the denominator for simple payback when export rules are favorable.