[RE-wrenches] Magnum Battery Charger Question

[Jason Lerner]

Hello All,

Have a question on a Magnum 1212MM-AE.  The battery charger will not  
get above 13.8 Volts.  The system worked fine for the first three  
weeks with Voltage rising to 14.4 volts for the absorb cycle,  but now  
it will not.  The battery size and type setting are correct,  and  
using the "custom" charging profile set to 15 Volts does not work.

We have tried unplugging the BTS,  while also making sure the battery  
Voltage is below 12.7 when starting the generator.  The remote control  
is attached and there is 35 amps going into the battery with a 2KW  
honda.  It will sit at 13.8 Volts and do an absorb cycle for 2 hours  
and then go into float.  There are 4 golf cart batteries in the system  
and all cells check out good, no dead cells,  and connection are all  
bright and tight. Turning the main DC disconnect off while the gen is  
running shows 14.8 Volts at the battery terminals of the inverter,   
but the batteries will not rise above 13.8.  Magnum says the battery  
charger is fine since it goes up to 14.8 when the batteries are  
disconnected, but that doesn't make for a very efficient charger if it  
is not connected to the batteries......

I am not familiar with these chargers,  did I miss something,  any  
ideas?
Thanks,

Jason Lerner
Waldron Power and Light Co.
(888) 927-2526