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dear sir/madam, my question is about the solar panels required to charge a battery, the battery paramaters are six batteries of 12V, 75 Amphour connected in series. kindly send me some info about hw we can find out the specifications of panel required for this, as soon as possible

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As a quick example let’s assume you will use 1 Kwh per day in New Delhi, and another for Dehradun using 12 volt battery Battery capacity is the same for both locations [1000 wh x 5] / 12 volts = 416 AH at 12 volts. Panel wattage needed in Delhi is based on winter Sun Hours of 5.6 hours so panel wattage = [1000 wh x 1.5] / 5.6 h = 267 watts. So using a 270 watt panel with a MPPT controller you max charge current is 270 w / 12 volts = 22.5 amps, or roughly a C/20 charge rate In Dehradun the winter insolation is 1.2 hours so panel wattage = [1000 wh x 1.5] / 1.2 h = 1250 watts. So with MPPT charge controller the max current is 1250 w / 12 v = 104 amps or roughly C/4 charge rate which would likely demand AGM batteries for that high of a charge rate. Courtesy: Edited from SolarPanel Forum.

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