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Solar Panel Calculator

Estimate panels needed, system cost, savings, and payback period.

Medium (4h) — C. Europe, N. US
Panels needed
50 panels
System size
20.0 kW
Est. install cost
$20,000–$30,000
Annual savings
$1,020/yr
Payback period
24.5 yrs
25-year savings
$500
CO₂ offset/year
1,920 kg

⚠️ These are estimates. Get a professional assessment for accurate figures.

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