Forum Discussion
BFL13
May 03, 2013Explorer II
So, as long as the "24v" panels make 220w they all do the same amps for charging batteries with MPPT. So panel "efficiency" as described in the OP of this thread is a complete red herring.
It sure matters with "12v" and PWM though. You can get "145w" panels (those DM things) that are no better than 130w panels for their "expected max amps" (ie Isc) You can't go by their wattage with 12v. You must look at the highest Isc per watt rating to get the highest charging amps when comparing equal watt size 12v panels.
It sure matters with "12v" and PWM though. You can get "145w" panels (those DM things) that are no better than 130w panels for their "expected max amps" (ie Isc) You can't go by their wattage with 12v. You must look at the highest Isc per watt rating to get the highest charging amps when comparing equal watt size 12v panels.
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