Solar 101
System Sizing Tool
Determine your monthly usage from your bill.This is measured in kWh per month.
Manual System Sizing Tool
Using the amount monthly kWhs from your utility bill, and the amount of sun hours your location receives, you can find the size of your system, in DC watts, needed to cover 100% of your usage.
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< 3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
6.0 |
6.5 |
50 kWh |
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100 kWh |
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150 kWh |
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200 kWh |
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250 kWh |
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300 kWh |
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350 kWh |
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400 kWh |
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450 kWh |
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500 kWh |
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550 kWh |
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600 kWh |
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650 kWh |
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700 kWh |
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750 kWh |
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800 kWh |
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850 kWh |
11.5kw |
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900 kWh |
12.2kw |
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950 kWh |
12.8kw |
11.0kw |
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1000 kWh |
13.5kw |
11.6kw |
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1050 kWh |
14.2kw |
12.2kw |
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1100 kWh |
14.9kw |
12.7kw |
11.1kw |
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1150 kWh |
15.5kw |
13.3kw |
11.6kw |
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1200 kWh |
16.2kw |
13.9kw |
12.2kw |
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1250 kWh |
16.9kw |
14.5kw |
12.7kw |
11.3kw |
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1300 kWh |
17.6kw |
15.0kw |
13.2kw |
11.7kw |
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1350 kWh |
18.2kw |
15.6kw |
13.7kw |
12.2kw |
10.9 kw |
10.9kw |
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1400 kWh |
18.9kw |
16.2kw |
14.2kw |
12.6kw |
11.3kw |
11.3kw |
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1450 kWh |
19.6kw |
16.8kw |
14. kw |
13.1kw |
11.7kw |
11.7kw |
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1500 kWh |
20.3kw |
17.4kw |
15.2kw |
13.5kw |
12.2kw |
12.2kw |
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1550 kWh |
20.9kw |
17.9kw |
15.7kw |
14.0kw |
12.6kw |
12.6kw |
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Get Started with Solar
Determine your usage from your bill.
Have one of our experts design a custom system or select a kit.
Select an approved installer from our nation-wide network.
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Know what you want? View pre-packaged grid tie kits.
Shop individual components. 
How To's & DIY Videos and Podcasts.
