Yes, Computers, monitors, modem, UPS's & lights need to run about 16 hours a day 7 days a week if possible with no grid power. I have 6 large SLA's less than a year old and fully up, but they're not deep cycles so they would go down fast unless they themselves have some power going into them. I believe the AC200P has an optional 12 volt accessory cord that plugs into the 25? amp input receptacle with alligator clips for 12 volt auto batteries no pure sine inverter required. So, I could still hook up my 6 SLA's in parallel and trickle charge them from a 12 volt charger plugged into a small gas generator to keep them from dying to keep the Bluetti from dying? I'm simply trying to enlarge the effective battery capacity capability of the AC200P since you cannot connect it to a second AC200P if there was one. I must use what I currently have until I can afford to add solar panels. I suspect I would need to over panel with about 1000 to 1200 watt capability to maintain 700 watt sustained input. That's a thousand to twelve hundred dollars I won't have up front. Yes, this would be a band aid stop gap fix that seems like it might work long enough to get me by or at least keep us online for most of the day if we are lucky after a storm. It's the CLEAN power I have to have one way or another to get by.