Thanks
@Whoareu2200 , great idea!
I have a really old battery that dealer recommended I change over 20k miles ago, and so I haven’t tested running it off the car battery when car is off.
I have a power strip that goes into my 110v in back, and I plug my Jackery and 2 other small power banks into it, and the fridge is plugged into the 110v on battery. You could run a power strip like me and add a Jackery into the mixx, then plug the Jackery into 110v and 12v cigarette lighter at the same time, so that when car is on it draws from plug in back (via strip) and when car is off it draws from cigarette lighter in front. Jackery automatically prioritizes AC over DC, so when AC is on DC is disabled.
I haven’t check it the Jackery has battery protection, but if it does then it would be a way to solve that puzzle, as well as a way to store excess power from battery to be converted to extra run time when vehicle is off. If I didn’t let my uncle borrow my Noco booster, I’d test it for you. Unfortunately I have no way to jump myself at the moment so I don’t want to risk it with my old battery.
Jackery Portable Power Station Explorer 160, 167Wh Lithium Battery Solar Generator (Solar Panel Optional) Backup Power Supply with 110V/100W(Peak 150W) AC Outlet for Outdoors Camping Fishing Emergency
Amazon product ASIN B07FYJVFNK