battery choice
Hi, I am in analysis paralysis. I will be purchasing AGM jars. Here are my two choices: AGM L-16 Surrette 400 amp-hour six volt with 0.145 plates cost $520 plus tax and shipping Four are n...
Forum Discussion
According to the "amp hour law" he could use a 50% charge rate. Testing on EV systems has shown this.
If you don't believe this, then consider what happens just as amps begin to taper. I'm using a 45a charger on a 430Ah bank... so way less than a 50% rate. But at less than 14.4Vabs, amps begin to taper at 89% soc (-45Ah's), ... which means, at the transition from bulk to abs, 1a is being delivered for every 1Ah depleted. This is, in no way, harmful to the battery. Likewise, at 50% soc (-215Ah's), a 50% charge rate of 215a would deliver 1a for every 1Ah depleted. At such a high (C/2) rate, amps would taper immediately... and the correct voltage should maintain current at a rate such that 1a is continually delivered for every 1Ah depleted, up until such time as the banks charging (in)efficiency no longer allows it to do so. In the case of my bank, that occurs somwhere's after 95% soc. So that 1:1 ratio can be maintained throughout the huge majority of the charge.
If you don't believe this, then consider what happens just as amps begin to taper. I'm using a 45a charger on a 430Ah bank... so way less than a 50% rate. But at less than 14.4Vabs, amps begin to taper at 89% soc (-45Ah's), ... which means, at the transition from bulk to abs, 1a is being delivered for every 1Ah depleted. This is, in no way, harmful to the battery. Likewise, at 50% soc (-215Ah's), a 50% charge rate of 215a would deliver 1a for every 1Ah depleted. At such a high (C/2) rate, amps would taper immediately... and the correct voltage should maintain current at a rate such that 1a is continually delivered for every 1Ah depleted, up until such time as the banks charging (in)efficiency no longer allows it to do so. In the case of my bank, that occurs somwhere's after 95% soc. So that 1:1 ratio can be maintained throughout the huge majority of the charge.
