I own a BLUETTI AC200P and I’m looking at purchasing a 24V 200Ah lithium battery to recharge it while out in the field. I’ve picked out the battery, charger, and a DC-DC boost converter that I believe are all compatible — but I’d appreciate a second opinion from folks more knowledgeable than me.
I’ll list the items below. If anyone would be kind enough to take a quick look and verify whether this setup should work as intended, I’d be very grateful.
Short answer Yes.
The voltage booster will increase the output voltage of your LFP battery to 36V, which is within the limits of the AC200P input.
The AC charger will recharge your 200Ah LFP battery.
However, you will not get the full output of the voltage converter of 15A as the AC200P will limit input to 12A.
This will give you a theoretical maximum input of 36x12 = 432W.
This also assumes that a. The DC output of the voltage booster is a “clean” output, and, b. that it does not clip output if it gets hot.
Voltage boosters are notorious for getting hot, so make sure it is not resting on anything that heat will damage or catch fire. I would also check regularly i.e. don’t leave it alone for the duration of use.
Last, but not least, put a correct rated midi fuse on the + line near the LFP and another on the + output of the booster near to it. Edit: Forgot to mention cable sizing relative to length and load.
Thanks for the information! would it be easier just to get a 200ah 48volt battery and just put a 12a dc inline fuse between the battery and the bluetti? and just ditch the step up converter then?
