Solar Savings Calculator

Solar Electric Systems Size, Coat & Savings Calculator

How much money can you save?

What size solar system do I need for my home? Though this is a complicated question, we have simplified it for you below. Follow the 5 steps to estimate what size solar system you might need. Then calculate how much it might cost to install the solar system!

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.

How many hours of sunlight do you get in an average day?

The map below shows the approximate average hours of sunlight for different areas of the US.



Zone 1 – 6 hours Zone 3 – 5 hours Zone 5 – 4.2 hours
Zone 2 – 5.5 hours Zone 4 – 4.5 hours Zone 6 – 3.5 hours

Step 3: Now estimate the cost of installing a solar PV system of that size with our Solar Cost Calculator.

Disclaimer: Material presented on this website is intended for information purposes only. It is not intended as professional advice and should not be construed as such. Any use of the information and calculators on this site for any purposes other than for a general overview or estimated results is not endorsed or encouraged.

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