hi..
ok if,we set batt volt 48v for both side through solar charger and inverter/charger(built in)
now both have same volt for charging means 48volt
suppose grid / generator have cababilty of providing enough Ampere,for example DC charging Current is 40Ampere through inverter/charger
u know solar Ampere is changing with respect to weather condition,its means both source are providing Ampere
one source is providing same Ampere at any time it is grid /generator{depend condition of battery (how much batt need current)}
2nd solar source is not providing same current .?
its bad for battery life or not
Lucky
I am not sure I fully understand the question but in a typical off grid solar system there is PV modules feeding a charge controller charging a battery. Now there is usually an inverter tied to that battery with a generator. So the Inverter can also charge the battery if the battery is low. Obviously the inverter and charge controller need to be programmed correctly fot eh battery you have. Another thing to keep in mind as most battery manufacturers have a MAX charge rate in Amps so you want to verify what that is and set things up accordingly.