Adjusting the Charger

My PFC 20 was going to need to be adjusted.  Three dead cells means 9.6 volts difference in the maximum charge. (Not to mention almost a full KWh of power source gone) The PFC 20 has a voltage limiter that ensures the batteries don't get toasted.  But you have to adjust the setting.  There's a download area at manzanitamicro that details this.  One thing you must absolutely make certain of: that switches 1 and 4 are turned on!

When I had my overcharge situation, the switches were off and the MINIBMS was not completely hooked up.  In the long run, my bad! And now three cells total are dead. At $100 a cell, that's a bad mistake to make.  But both are working well together and I'm at the point where my confidence is high.

I did a charge tonight and this worked perfectly: I started charging at 15 amps then it throttled back when the battery pack came close to the set "full" voltage then went into a top balance mode of 1.75 amps while the timer was flashing blue. All the batteries were shunting, perfectly equalized, with the red lights on.  Excellent!!