I have a 24V lead acid battery charger rated at 20A with boost and trickle modes for a standby generator. The charger is connected in parallel with the battery and a load(generators auxiliaries). The auxiliaries consume a load of ~10A when the generator is in service and, 1.5A when it is on standby mode. When the genset is in service the battery charger goes into boost mode and only supplies a max. current of 8-9A causing the batteries to drain. When the battery charger is on trickle mode it only supplies 0.5-1A, again, causing the batteries to drain. What should i do if i want to drive the load and charge the batteries at the same time?