This Calculator will help you get a ball park idea of the size system you will need to cover 100% of your energy needs. This calculator is customized for the north east climate. The north east of the united states is rated at 4.3 hours of sunlight per day in average. This rating is very conservative but a great starting point. Most of the systems i have installed outperform this rating.


Input the last 12 months of energy usage from your electricity bill. This information is usually on the second page of your bill towards the bottom under Electricity Used.

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