i am using apc 1500watts ups with two batteries having 24v(12v+12v) both battery have a capacity of 230*2 amps and 23*2 plates Recently i replaced the batteries with same 230+230amps but with 33*2 plates. Ups was not charging so i contact with the technician, they figure to solve the problem by attaching the battery charger separately with inverter. what he did is he attach 24 volt charger with batteries and at the same time with inverter is also connected with the batteries so batteries are charging with the charger and the inverter at the same time parallel. kindly tell me is this right or not.