1. Calculate your kWh usage
Now if you don't have an electric bill you can always take a look at this home appliances chart to figure out the amount of power you are using manually.
2. Look Up Your Peak Sun Hours
Average peak sun hours are influenced by your geographical location and climate conditions. To optimize solar power usage:
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Consult a sun hours chart to ascertain daily peak sunlight hours.
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Record the daily peak sun hour average of the nearest city to gauge your solar potential.
3. Calculate the Size of Your Solar System
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Divide your daily kWh energy requirement by average sun hours to find kW output.
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Divide kW output by panel efficiency for the estimated number of solar panels.
For example, with 33 kWh daily and 6 peak sunlight hours:
(33 kWh ÷ 6.1 sun hours) x 1.15 efficiency = 6.2 kW DC system size.
Multiply by 1000 to convert kW to watts:
6.2 kW x 1000 = 6200 watts of solar panels needed.
You can also use our calculator here: