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Solar Power Calculator
See how much energy your solar array will produce.
Daily output = panels × W × sun hours × efficiency / 1000. Yearly output is daily × 365.
How it works
Daily output = panels × W × sun hours × efficiency / 1000. Yearly output is daily × 365.
Worked example
10 panels × 400 W × 4.5 h × 0.8 = 14,400 Wh = 14.4 kWh/day ≈ 5,256 kWh/year.
Recommendations
- Real output depends on weather and shading
- Seasonal sun hours vary — check your region
- Account for inverter losses (5–10%)
Tips & advice
- Compare your output to your bill over a full year
- Monitor each panel with a solar app
- Trim nearby trees that shade the array
Fuel Consumption Calculator
Find your real fuel consumption from a full tank test.
Fuel Cost Calculator
Know the cost of your trip before you leave.
Weeks Between Dates Calculator
Find out exactly how many weeks separate two dates.
Months Between Dates Calculator
Know how many months separate any two dates.
Solar Power Calculator
See how much energy your solar array will produce.
Use the calculatorInvoice Generator FAQs
Yes, all 20 home calculators are 100% free, private and run entirely in your browser. No account needed.
They use standard industry formulas. Always round up for materials and confirm with a professional for structural work.
The calculators use metric units (meters, liters, m³). Convert imperial measurements beforehand if needed.
No. Calculations happen instantly in your browser and nothing is sent to any server.
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