Hi, I have recently had a new multi plus ll-48 5000-70 installed but having issues with generator running charger. I have a generator rated at 5000kw continuous at 20amps max. The issue is the charger keeps dropping out if input amps are set above 7.5amps which only allows about 20 amps into the batteries. I was hoping to get around 50amps into the batteries with that size generator. Is there a setting that could be incorrect?