Kremer

I want to try and design an affordable UPS style system for friend/family that is able to charge from grid, provide deep discharge, and...

Start a support/service ticket here: https://www.bluettipower.com/pages/self-report

Mine are attached the same.

Yes, but they are the same voltage. It is the dang BMS that is confused. I actually did a full calibration cycle last week to see...

I made this:

Yes, it worked well. I made a video about it:

I have one and love it, but pawn shop with no warranty? $250.

I think its the B300/B300S BMS that is in charge of all the SOC and battery "brains" of the combination. It is what controls the charge...

Bluetti are essentially same.

PV, the battery and inverter are in parallel on the common DC bus. Loads are picked up first and if there is additional PV available the...

I have tested with 2 B300 + 1 Vatrer, and 2 B300 + 2 Vatrer. The Vatrer's seem to work really nicely together - the BMS's stay in sync...

No, just leave it off. Balance while charging means "Only balance cells while charging" so turning it off tells the BMS to balance all...

I would simply rewire as 8S with the 8S BMS and evaluate if top balancing is needed.

I have my AC300 connected to 2 B300 + 2 Vatrer Rack batteries. It all works well, but the B300 SOC goes crazy when it fluctuates in...

Thanks to everyone who helped! I did a test by turning off the service disconnect at night. The lights had the barest flicker, but...

I built a logger for my Cyberpower 1500 UPS when I expanded the small lead-acid to bigger lead-acid a few years ago. The charging...

Chargers are simpler than people think. They are just power suppliers. You set the desired end voltage and let it run. The current is...

With the min cells at 3.45+, your balance isn't too far out. Recommend you lower your absorption voltage to 13.8V and extend the...

This is typical. Your cells are imbalanced. Voltage only relates to balance when they're nearly fully charged. Even imbalanced cells...

I decided to pull the trigger on another rack mount one, from Amazon this time. I filled my batteries by 3:30 today after days and days...