Home Skillet wrote:
Voltage is what charges a battery, not amps.
No need for the heavy guage wire.
RESISTANCE of the wire over DISTANCE REDUCES the available VOLTAGE at the OTHER END of said wire.
This in turn REDUCES the available AMPS that the devices on the other end of said wire gets.
When working with low voltages like 12V you MUST UPSIZE the wire as much as possible in order to REDUCE the resistance (IE voltage lost in that resistance).
With 12V wiring even .1V is a HUGE LOSS since the usable voltage of a 12V battery system ranges from low of 10.5V (fully flat battery) to 13.2 for a fully charged battery at rest. Basically a voltage range of 2.7V!
You simply can not use the rule of thumb for 120/240V devices which is 5% voltage loss allowable in a 12V system.
For 120V a loss of 5% is 6V so 120V would be 114V which is acceptable.
For 12V systems the battery voltage at rest is typically 13.2 so 5% loss is .66V giving you 12.54V or only 2.04V from a flat battery voltage...
When it comes to charging batteries quickly any unnecessary RESISTANCE in the wire is a bad thing and not wanted...
Mexico is on the right track...
