BFL13 wrote:
CA Traveler wrote:
"Will the longer wire choke even 7 amps by more than the shorter to notice?"
Technical detail as wire loss reduces the voltage, amps are unchanged. Hence there is less power at the end of the wire to charge. Example: 5A at 14.8V is the maximum charge while 5A at 13.6V is less of a charge.
5 amps is what is charging the batt not power
It's absolutely about power - both amps and voltage. How much charging occurs at 12V and 5A?
Perhaps you are overlooking the OPs setup with the long wires on the controller output. With a voltage below 14.8V at the battery the charging is less. A crude analogy is the WFCO controllers with their lower voltage taking much longer to charge, the batteries are NOT getting the expected power for say a 20A rated unit.
