Right now, since my battery pack is tiny, it's not hooked up to anything directly in the trailer. However, I will be routing all power through the AIO unit and setting it to use as much solar as possible when it is available. Once I build a bigger battery bank, I'll change a few things around so that part of the battery capacity is used overnight or on cloudy days, then switch back over to the grid to run everything and charge the batteries if need be. That way, I'll have a reserve in case of emergencies but also will lower my use, and expense, of grid power.