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☀️ Solar Panel Estimator

How many solar panels does your home need?

Enter your monthly power bill (or your kWh) and see exactly how many panels it takes to cover your home — plus the system size and roof space you'll need. Built for SW Florida, San Diego, and Las Vegas.

1How much power do you use?

Don't know your kWh? Just use your bill — we convert it for your area.

2Your home & panels

Higher-wattage panels mean fewer panels and less roof space for the same power. Sunnier areas (Las Vegas, San Diego) also need fewer panels than SW Florida.
Solar panels you'll need
– panels
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System size
0 kW
Roof space neededat 18 sq ft per panel
0 sq ft
Est. annual production
0 kWh/yr
Your estimated usage
0 kWh/yr

Get your exact panel layout & price

We'll map your roof and design your system — free, no pressure.

✓ Thanks! A Higher Power Solar advisor will reach out with your custom panel design.
Estimates are for planning only and depend on your real usage, roof angle, shade, and weather. Prefer to talk now? Call (941) 830-4937.

How we estimate your solar panel count

Two things drive how many panels you need: how much energy your home uses in a year (kWh), and how much sun your roof gets. We take your monthly bill or kWh, convert it to a yearly total, then size a system to cover the share you picked. A real-world "derate" of 80% accounts for heat, wiring, inverter losses, and less-than-perfect roof angles — so the number you see is closer to what actually lands on your meter. Sunnier markets like Las Vegas (6.0 sun-hours) and San Diego (5.7) need fewer panels than SW Florida (5.0) for the same power.

Good news on incentives: Florida's solar property-tax and sales-tax exemptions plus net metering are still in place, and California (NEM 3.0 + SGIP battery rebates) and Nevada net metering are unchanged. Ask us which credits your specific home qualifies for today.

How many solar panels do I need for a 2,000 sq ft house?
There's no fixed panels-per-square-foot rule — your power usage matters far more than your home's size. That said, a typical 2,000 sq ft home uses about 10,000–11,000 kWh per year, which usually works out to roughly 16–21 standard 400-watt panels to fully offset the bill. A very efficient home with LED lighting and a newer AC needs fewer; a home with a pool pump, electric water heater, or an EV needs more. Enter your actual bill above for a number matched to your usage.
How many panels do I need to run my whole house?
To cover 100% of a home's power, most SW Florida homes land around 18–28 panels, depending on your bill. The math is simple: we take your yearly usage, divide it by what one panel produces in your area (after real-world losses), and round up. Pick "100%" or "110%" above to size for a full offset — 110% leaves headroom for a future EV or pool.
How much roof space do solar panels need?
Plan for about 18 square feet per panel once you include mounting and spacing. So a 20-panel system needs roughly 360 sq ft of usable, unshaded roof — about the size of a two-car garage. Higher-wattage 440-watt panels give you the same power in fewer panels and less space, which helps on smaller or cut-up roofs.
Does where I live change how many panels I need?
Yes. The same home needs fewer panels in a sunnier market. We use peak sun-hours of 6.0 for Las Vegas, 5.7 for San Diego, and 5.0 for SW Florida. More sun-hours means each panel makes more power per day, so a Las Vegas home can hit the same offset with noticeably fewer panels than an identical home in Florida. See our other solar tools →