Can I charge a Jackery 5000 through Low-PV input using 48v DC power supply?
I'm using a Jackery 5000 for whole house backup, connecting it through a manual transfer switch with my house's critical loads. The Jackery's 7200 kw output should run all the circuits in the critical load panel fine for at least 6-12 hours, especially if we're thoughtful about consumption while on backup power.
We have 2 EVs, each with an 1800w AC power outlet and I'd like to recharge the Jackery from them during extended outages (over 100 kwh available).
The only snag is that the Jackery shuts off its 240v output while recharging from AC. To get around this I'd like to convert the AC from the cars to DC to send into the Jackery's 16-60v PV-Low charging inputs. There are two PV-Low inputs that must be run at the same voltage. Together can take up to 21amps.
My question is: Could I use a 48-60v DC power supply or a 48v DC golf cart battery charger to charge the Jackery using these PV inputs, or is will those confuse the Jackery because its expecting solar input?
I'm thinking of something like this:
Or a couple of these:
If this could work in theory, I'll want to try to optimize how many watts to send to the Jackery and how long to keep the cars are connected for each recharge. I think I' could get by fine with 8-10 kwh per day of consumption in an extended grid down situation. This would take 400 watts of continuous input from the cars or 1200 watts for 8 hours per day from the cars.
Any thoughts on if this plan seems workable, the best way to set it up, and recommended gear to use for the DC in would be greatly appreciated.
Thx.