Calculate Solar Array Size
Step 1: Look at your electricity bills and average out your usage to find “Your kWh/year”.
- kWh/year = Average Kilowatt Hours of electricity that you use in a typical year.
- Your bill may tell you your kWh/month. If your bill is ~$100/month, you might use ~1,000 kWh/month. If your bill is ~$200, maybe closer to 1,800 kWh/month.
Step 2: Look at the US Solar Map below to get the number of hours per day the Sun shines on your house.
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