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I made a couple videos while learning about my new Bluetti AC300, I figured they might be useful to others. I had no idea how PV priority and the architecture of this thing functioned until actually messing with it, despite actively looking for that info. Here is the first video: Another I...

So I just did this last night... It WORKS PERFECTLY! It charges and discharges with the main unit and shares draw and charge amps in parallel with the OEM battery, just like you would think it should. You just need to have at least one B300 attached so the head unit has a BMS to talk to and...

Yes, read post 4 of this thread. The AC300 NEEDS a B300 to talk to. The B300 and its BMS aren't an optional accessory, at least one attached is mandatory to have the AC300 work.

It’s a beautiful thing isn’t it. On a good day I can make and store 10kWh with my 1600W of panels.

I’m still happy with my two since balancing them.

I have, sent them photos of the indicated imbalances a couple days ago.

The new little Bluetti, the AC2A, does not exhibit these issues in UPS mode and is pretty solid. They have learned.

Yes, at low-mid charge levels they are all about the same voltage, the flat part of the SOC/Voltage graph. You need to charge them up to see how matched they are.

@johnnysweekends @Jasonoid @minutemanprep The guy at the right escapes my jet lagged and sleep deprived memory at the moment, he does RV related things. I also ran into: Scott @EverydayHomeRepairs , @everydaysolar Ray @diySolarPowerFunWithRay

Agree. Every surface had a thick polished heavy lacquered look to it to me, was kind of strange seeming. I think the cooktop was induction at least. They probably scraped the label off something else and stuck their own on. I didn’t look too close at the name on it and did not notice that.

Get them on a charge now, if they are like my two they might take until then to top balance.

That's all the built in controllers on the head unit will take. You can however add solar to the B300 battery, it will take 200W directly connected, then up to 500W via a D050S Charge enhancer (external MPPT) connected to the AC adapter charge port. For up to 700W total input directly to each...

The AC300 does not know the external pack is there, there is no BMS/computer connection, only the power leads. It properly shows the B300 battery, which is same voltage and being augmented with the external in parallel, in theory they are all at the same charge level.

I ran into and met everybody else but you while I was helping out at the Bluetti booth, super nice people.

I've had two of these for a couple weeks now. They seem to be solid, but came not well top balanced, they were kicking out on individual cell protection at like 53.5V pack voltage. Normal cycling did not give them enough dwell at the higher voltages to balance. I took them offline 5 days ago...

I don't think I would try it with lead acid. It really should be 16S LiFePO4 matching the B300 or B300S OEM battery. I have only tried it so far as a proof of concept, not a permanently wired up thing.

If it’s sat for a bit it may be out of pack balance. I’d just plug it in and leave it overnight until it stops taking power. Then discharge at low load, like 50-100W running a fan until it shuts off, plug back in overnight.

Here is some math on Honda inverter generators I did some time ago based on Honda's run time claims at 1/4 and full load: The Honda EU7000 burns 5.1 gallons of gasoline in 6.5 hours at 5500 W to make 35.75 kWh at 7.00 kWh/gal (fuel injected!) The Honda EU6500 burns 4.5 gallons of gasoline in...

I have a 200L, it is a great machine.

I walked through it too, super nice and polished, it certainly should be though for 100K. It had some really wide tires for a trailer, probably to avoid going to double axle. They said it had a 1kW array on the roof.

I’ve been balancing my two for 6 days now. The balance current is silly slow. Allowing me about .2V/day. I’m at 55.2. High cell is 3.612, low cell is 3.370. It’s going to be a while….

60V/5A lab power supply works great for maintenance use.

At the factory like 30% charge? I think mine were all pretty nearly 3.2V out of the box, but there’s a lot of variability in SOC at that voltage. Charge it up and watch them diverge.

They are pretty responsive, I hope you see improved results. Forecast is neat when it works. Yesterday expected 9.3kWh, I got 2.5 due to clouds rolling the wrong way. Today is 9.7 and I need it!

I finally have one of my two balanced as of this morning. I noticed that it goes into overvoltage alarm at 56.0V, I did not check to see if it disabled charge at that. So I'm balancing them at 59.95. Yours could also be kicking out on single cell overvolt unless they are well balanced.

I’d point the generator cooling air exhaust at the propane tank(s). Let the waste heat help you.

Most Bluetti products will wake up with solar input then power themselves off a bit after it goes away. Inverter is never on and consuming standby power unless you turn it on.

I'm really close to trying the same thing. The ports are clearly straight DC bus voltage. My plan is to buy a factory battery cable, cut it in half and extend to a 100ah rackmount pack.

That was vague, not this site. one of the HomeAssistant forums. I'm happy to share what you need to duplicate.

Thank you for that. They have been pretty good to me so far and I think I would be disowned if I made that video. Maybe in the future.