joev
New Member
Posts: 1
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Post by joev on Apr 18, 2018 10:51:33 GMT -8
If I use a Renogy 40 Amp Commander MPPT Solar Charge Controller w/ MT-50 how many 100w panels can I install & how many 12v batteries will it charge?
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Post by tattoo on Apr 18, 2018 18:37:05 GMT -8
I had 8 panels and six 6V batteries with mine so that would be 3 12v batteries, I would say that is max and the most that's recommended...
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How many?
Apr 26, 2018 22:50:31 GMT -8
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Post by bmwtech on Apr 26, 2018 22:50:31 GMT -8
The solar control unit max amperage is the output amperage not panels. So battery charge voltage either 12 volts (voltage would be 14.?volts) * 520 Watts (40 amp Rover manual) or 24 volts (voltage would be 26-28 volts) * 1040 watts.
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Post by tattoo on Apr 27, 2018 4:03:50 GMT -8
The solar control unit max amperage is the output amperage not panels. So battery charge voltage either 12 volts (voltage would be 14.?volts) * 520 Watts (40 amp Rover manual) or 24 volts (voltage would be 26-28 volts) * 1040 watts. His question was how many 100w panels can he use with a 40a CC?
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How many?
Jul 1, 2018 4:05:49 GMT -8
via mobile
Post by Viron on Jul 1, 2018 4:05:49 GMT -8
If I use a Renogy 40 Amp Commander MPPT Solar Charge Controller w/ MT-50 how many 100w panels can I install & how many 12v batteries will it charge? Most lead acid batteries have a charge rate of about C .2 or 1/5th of their Ah capacity. Based on that a 40 charge controller would be suited for about 200Ah of batteries. A smaller slightly batter bank is ok provided you have a load to offset the excess amperage to the battery. Over current to the battery will shorten its life. So the final step is to convert Watts into battery charging voltage of 13.8v-14.3 depending the battery. PV Watts/Charging Voltage = Current available to battery.
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Post by tattoo on Jul 1, 2018 6:11:42 GMT -8
Most lead acid batteries have a charge rate of about C .2 or 1/5th of their Ah capacity. Based on that a 40 charge controller would be suited for about 200Ah of batteries. A smaller slightly batter bank is ok provided you have a load to offset the excess amperage to the battery. Over current to the battery will shorten its life. So the final step is to convert Watts into battery charging voltage of 13.8v-14.3 depending the battery. PV Watts/Charging Voltage = Current available to battery.
Not really, You can double the 200ah and he will be just fine.... I had the same 40a CC in the beginning and had 430ah of batteries and it worked GREAT......
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