Multiple Batteries in Parallel
I have several regular 12v batteries that are different sizes. Can I safely hook them up in parallel without damaging any of them?
Forum Discussion
Boon Docker wrote:
BKF13
There was 182 ah left in the 250 and 65 ah left in the 100 after your test.
So in theory if you continued draining them there would be 117 ah left in the 250 and 0 ah left in the 100. Yes?
65/73 SOC = 8% diff in SOC (if it was that really) if maintained going down would be to 0% vs 8% I think. ??? Can't see that 117 left in the 250 which would be 47% SOC. Got me confused! :)
As the "experts" mentioned, the inverter low voltage shut down would occur long before things got that bad, so in my case the 100 would still be well up in SOC under the loaded voltage (which was about 11.9 when I stopped the 91 amp draw.)
On stopping the 91 amp draw, voltage bounces back to reflect the SOC in an hour or so after it settles. You can wait a whole day if you are fussy but it will be nearly the same.
Don't try to be too exact with my test numbers since it was a rough test, and an unknow margin of error from heat loss on recharge and my crazy wiring set-up.
