My set up AC300+B300+Fogstar 5kWh battery working nicely. I had just one unexpected drop from 20% to 0%. Probably Bluetti BMS lost calibration. 8kWh storage is good amount for my conservatory 1.5kW solar panels. No longer worrying if we have enough energy, when cooking dinner or washing clothes. :)
Thank you @Kremer to be first brave man to test if third party battery can work with Bluetti AC300. :) Now I'm after connecting 5kWh Fogstar battery to my AC300 and looks like this solution working well. (y)
@sideeffect yes, you need a P090D To P150D and then I cut the P150D end. Locking only on AC300 side. For me looks like AC300 calculating capacity using voltage. So far my setup AC300+B300+Fogstar working well. Fogstar is connected to second AC300 input, so is charged direct from there.