How can you use a 12v LiFePO4 with the CHG connection on the Charger 2? I know it is setup for a power station. How can a battery (bank) be tied in?
I don’t think you can “directly”. The Bluetti Charger 2 expects the battery characteristics/charging profile of a lead acid battery, which has a different curve than lithium/lifepo4 batteries. Perhaps you can do so if you find an additional dc-to-dc charger (or a charger controller) that can mimic that type of voltage output. If you try wiring directly from bank to CHG port on Charger 2 it should fail.
My last install was using a etaker F2000 that allowed charging a power station or a LiFePO4 from the same port. Can anyone from Bluetti please expand on why the Charger 2 can / cannot work with a 12v LiFePO4 battery / bank?
Does the app allow you to set the charging profile of the CHG connection thus turning it into a charge controller?
If you’re trying to use a 12V LiFePO4 battery with the CHG port on the Charger 2, the important thing to understand is this:
The CHG connection is an output designed to charge a power station, not a bare battery. A power station has its own built-in BMS, charge controller, and communication logic.
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I’ve now learned that you can set the voltage in the Bluetti app for the CHG output and the battery has a built in BMS. The etaker f2000 worked so why wouldn’t the Charger 2? Not trying to be argumentative. I’m just not great with electrical.
Not sure why you couldn’t use it for an LFP battery, but I did find this in the manual:
Q12: Why can’t I enable or use Reverse Charging?
A: Reverse Charging is available when the vehicle battery drops below 12.6 V and stops
automatically once the voltage rises above this level.
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