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don’t forget days of autonomy

Off grid systems are confusing to put together because you have to precisely calculate the size of the battery bank, its important the battery bank has enough capacity to power your loads especially during days of limited sun exposure. The term days of autonomy means the number of days a battery bank can provide the appliances you have connected to the system without a recharged by the solar panels.

The system’s location is important to determine how the number of “no sun days” which is an important variable to figure out the autonomy. The general rule for days of autonomy is 2 to 3 days for non-critical loads and 5 to 7 days for critical loads. The downsides of a off-grid solar electric system is when you have periods of limited sun and your days of autonomy is not evaluated properly you will have to ration the power stored in the battery bank until the weather gets better.

Author: Deep Patel

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  1. Hi kindly provide any document to show discharge procedure of Nicd batteries with dummy load in a 7 days autonomy solar system

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