Wire gauge recommendation
To get the most efficent charging to my batteries, with cost kept in mind, what wire gauge should I use between the batteries and charger? I have a pair of 6v gc batteries. They're about 12-15 fee...
Forum Discussion
grizzzman wrote:75 amps through #6 wire is 0.914 volts drop. Frame ground might be a bit better but you also have connections that add a bit. So with so 0.7 drop in the circuit the supply will be 14.6 and the load (battery) is 13.9 volts. 15 minutes later the Boondocker is at 13.6 volts.
If the converter is outputting 14.6 then with the voltage drop "correctly" delt with would not the voltage at the battery be at least close to 14.6?
#4 shows 0.575 drop so maybe 14.2 on the battery before that timer starts.
Now try 35 amp version....
0.427 drop with #6 and 0.268 drop with #4. This gives more time at a higher voltage and you end up at a higher state of charge before the voltage kicks down.
http://www.genuinedealz.com/voltage-drop-calculator
Member BFL13 ran these tests constantly and posted graphs all the time. I did similar testing to get my WFCO-55 into boost mode. I ended up with about 20' of #2 into four GC2 and it was still hit or miss to get the voltage low enough for long enough to trigger boost.
(credit to BFL13)
