Efficiency differences in down conversion.
The reason is that MPPT controllers are more efficient when they perform less down-conversion of voltage. If the distance between your panels and controller is great you will want to configure your panels in series to have a high string voltage, but that high string voltage will be easier to down convert to 24 volts than to 12 volts.
I have seen the above statement, more or less, a number of times on this site.
Can anyone tell me how much of a difference we are talking, for a controller to down convert to 24vdc as apposed to 12vdc? I mean, are we talking 1% to 3% loss due to inefficiency? Or, are we looking closer at 10% to 15%?
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