high rate charging on generator
Hi all, The batteries: 556 amp-hours of surplus acid AGM batteries 12 volt jars 105 lbs each. They are wired as two banks with balanced wiring. The depth of discharge: 12.1 volts under 425...
Forum Discussion
Hi Mr Wizard,
I bumped into a telecom engineer on facebook who manages several hundred battery banks.
He advised me that c/5 is the maximum charging rate for our surplus acid AGM batteries. I think that is quite useful information to have.
In my case that means:
139.2 x 4 = 556.8
556.8 / 5 =~ 111.38 amps
I've redone the setup on the Magnum to limit it to 90% of 125 amps, which is 112.5 amps. I also set up the input charging limit to 13 amps down from 15. That should limit charging to 108 amps. (I prefer to wear a belt and suspenders *grin*)
Fortunately, thanks to the fet overload I had throttled back on the charging rate so I did not damage the batteries.
The same gentleman has just told me that 300 cycles to 60% is what is expected for the lifespan.
I bumped into a telecom engineer on facebook who manages several hundred battery banks.
He advised me that c/5 is the maximum charging rate for our surplus acid AGM batteries. I think that is quite useful information to have.
In my case that means:
139.2 x 4 = 556.8
556.8 / 5 =~ 111.38 amps
I've redone the setup on the Magnum to limit it to 90% of 125 amps, which is 112.5 amps. I also set up the input charging limit to 13 amps down from 15. That should limit charging to 108 amps. (I prefer to wear a belt and suspenders *grin*)
Fortunately, thanks to the fet overload I had throttled back on the charging rate so I did not damage the batteries.
The same gentleman has just told me that 300 cycles to 60% is what is expected for the lifespan.
