MPPT charge controller calculator: Find the right
To select a charge controller, you''ll need to calculate the maximum amount of current (in Amps) that the MPPT should be able to
For example, if you have two solar panels creating up to 250 watts of power, you should get a charge controller capable of handling at least 20 amps. To help buy new solar equipment, check out the Recommended Solar Equipment section below. Learn more about setting up a solar panel system in my Simple Solar Panel System - Setup & Equipment Guide.
This max output current value is calculated by dividing the maximum system wattage (in Watts) by the minimum charging voltage of the battery bank (in Volts). In other words, we calculate how much current the solar charge controller needs to be able to put out by using this simple formula: MPPT amperage rating = (Max.
2 solar panels in each string. The power rating of our solar panels is 100W. The open-circuit voltage of our solar panels is 22.3V. The voltage of our battery bank is 12V. The lowest temperature is -3°F. For this system, the MPPT calculator suggests a Victron 100V-50A charge controller and an EPEVER 50 amp charge controller.
For example: A 100-watt panel can produce 100 watts per hour in direct sunlight. A 400-watt panel can generate 400 watts per hour under the same conditions. This doesn't mean they'll produce that amount all day, output varies with weather, shade, and panel orientation.
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