Forum Discussion
ktmrfs
Oct 22, 2013Explorer III
Artum Snowbird wrote:
6 volt golf batteries are designed to handle about 30-40 amps. You are trying to get 150 amps through both of them.
It's likely they will burn out inside or explode soon.
That's the biggest problem with 6 volt batteries, they are in series, so the current draw to handle a big load is passed through both batteries. With 12 volt batteries, each battery provides half the current draw because the batteries are in parallel instead of in series.
don't worry the 6V won't "explode" they will very easily supply 75A continous. They do that all the time in golf carts. In fact you can get 150A from a pair without damage, but with lots of internal voltage drop.
However, you are correct, trying to get 150A from a pair of GC without dropping the voltage to low, requres that they be around 75-100% charged, probably closer to 100% than 75%. To low a state of charge (lower voltage) internal resistance (more voltage drop) of a pair of Golf carts will likely trip the low voltage alarm on the inverter. For 150W you really need 4 golf carts or a pair of 12V.
Been there, done that, and 2GC for 1000W (90A) was problematic. Going to 4GC and home free.
Yes, 12V are much better for high current draw. That plus being in parallel helps as well.
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