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...
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I have the smaller Magnum 1012, a 1000W/50A. I use temp comp and let the Magnum set charging Volts.
I ran a bench test on a pair of Eaton Powerware 135AH batteries that were pulls from cell tower(s). It took 1.87KWH of charging to replace 1.00KWH drawn from the bank.
First I drew 800W with a ceramic heater until the KAW read 1.00KWH at 1:15 when I stopped the heater. The Magnum's fan was running furiously. It took the Magnum about 15min to cool down. Battery Volts rebounded from 11.99 to 12.33.
Next I used the house 120V source to recharge. At about 50min, the Magnum automatically lowered charging Watts from 950 to 600W due to the internal temperature as per the manual. The Magnum would cycle in/out of the hot condition. I shut down the test when the KAW showed 1.00KWH used at 1:13. The Magnum was in Bulk the whole time. The battery ended at 13.31V.
The next day I resumed the charging. The Magnum stayed in Bulk for another 36min and then ran 1 hour in Abs before switching to Float at 14.36. I shut the test off as the Magnum was only drawing 126W.
The PF never went below .98.
HTH;
John
I ran a bench test on a pair of Eaton Powerware 135AH batteries that were pulls from cell tower(s). It took 1.87KWH of charging to replace 1.00KWH drawn from the bank.
First I drew 800W with a ceramic heater until the KAW read 1.00KWH at 1:15 when I stopped the heater. The Magnum's fan was running furiously. It took the Magnum about 15min to cool down. Battery Volts rebounded from 11.99 to 12.33.
Next I used the house 120V source to recharge. At about 50min, the Magnum automatically lowered charging Watts from 950 to 600W due to the internal temperature as per the manual. The Magnum would cycle in/out of the hot condition. I shut down the test when the KAW showed 1.00KWH used at 1:13. The Magnum was in Bulk the whole time. The battery ended at 13.31V.
The next day I resumed the charging. The Magnum stayed in Bulk for another 36min and then ran 1 hour in Abs before switching to Float at 14.36. I shut the test off as the Magnum was only drawing 126W.
The PF never went below .98.
HTH;
John
