Solar panel production calculator
Enter how many panels you have and their wattage. See the output per panel and for the whole array, per day, month and year, using sunlight data for your exact location.
Your panels
Location
Sunlight data for any place in the world
Panel angle and losses
Options
14% covers typical losses from heat, dust, wiring and the inverter. Use 20–25% for partial shade or dusty roofs.
| Jan | 484 kWh |
|---|---|
| Feb | 521 kWh |
| Mar | 702 kWh |
| Apr | 801 kWh |
| May | 919 kWh |
| Jun | 922 kWh |
| Jul | 919 kWh |
| Aug | 827 kWh |
| Sep | 679 kWh |
| Oct | 576 kWh |
| Nov | 469 kWh |
| Dec | 451 kWh |
Estimated from latitude. Panel tilt 25° (best for this place).
Estimates only, not a quote. Real output depends on shading, weather, panel quality and installation. Savings count solar power you use yourself at today's price, rising 3% a year, with panels losing 0.5% a year.
Use the solar production calculator in 3 steps
- STEP 1
Enter your panels
Type the number of panels and their wattage from the label, for example 10 panels of 550 W.
- STEP 2
Set the location and angle
Search your city, then keep the best angle or set the real tilt and the direction your roof faces.
- STEP 3
See the production
Get kWh per panel and for all panels per day, month and year, plus a monthly chart.
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Typical prices are built in for 28 countries, including India, United States, United Kingdom, Canada, Australia, New Zealand, Germany, France, and sunlight data covers almost every city in the world.
Solar production calculator FAQ
By using this tool you agree to its Terms of Use and privacy notice.
A 550 W panel makes about 2 to 2.8 kWh a day in sunny places and 1.2 to 1.6 kWh in northern Europe. Enter your city to see the figure for your location.
Panel watts × peak sun hours × (1 − losses). For example 550 W × 5 hours × 0.86 ≈ 2.4 kWh a day. The calculator uses month-by-month sunlight data for your place.
Yes. Panels facing the equator (south in the northern hemisphere) produce the most. East or west roofs usually make 10–20% less. Pick your direction to compare.
14% is typical for a clean, unshaded system. Use 20–25% if there is partial shade, a lot of dust, or long cable runs.
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Questions about the solar production calculator?
Stuck, found a bug, or have an idea to make it better? Send a message and we'll reply within 1–2 working days.
- Email us at pketu916@gmail.com
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