AC300 ignores SOC low setting (but not SOC high)

Product Discussion BLUETTI AC Series
1

I have an AC300 hooked to one B300. When I set the SOC Battery High and Low settings, the high is honored, but the low one is always ignored, and the battery runs down to 0% and shuts off. Anyone else seeing this?

I have the AC300 set to Customized UPS, Time Control Disabled, Grid Charge Enabled, Battery SOC High at 85%. I’ve tried setting SOC Low to 5%, 15%, 20%, 30%, 50% and more and they all get ignored.

2

I have the same issue with my AC300, has anyone come up with a solution ?

3

in my understanding AC300 only stops AC and DC output in case of reaching lower SOC level. If system is still powered on the battery gets drained due to self consumtion. A few hours later the battery is empty for sure. My observation is that the system consumes about 20W per hour - with DC and AC disabled. If DC or AC is enabled the consumption is raising towards 50W/h - without any load. This means roughly 1-2% of battery per each hour.

4

Thanks for the response @FrankH My AC300 does not shut off the AC load at low SOC setting, that is the problem. Also the idle consumption with AC invertor, WIFI, and Bluetooth turned on is 67 watts. I did a 24 hour no load test with two different watt meters on the AC grid input, it used 1.6 kwh.

5

My AC200L does the opposite. It is permanently hooked up to a 1K solar array. When the internal battery reach the lower SOC setting at 30%, the grid power kicks in and the AC200L does pass-trough to support the AC current drawn (works has attended). But no mater what is the upper SOC limit, it will never reach it trough one day (its winter time here in Quebec, Canada, so i dont get much sun). Its currently set to 80% but when the recharge from PV reach only 39%, the grid pass-trough will be cut off and the current drawn will be switch to the internal battery until its down to 30% and this cycle repeats everyday. Why the Bluetti app gives us a SOC config option but it is not respected by the system is a very strange behavior to me. The problem is either a poorly developed app or Bluetti fail to explain correctly to the customer how is SOC settings really works. Bluetti should address this ASAP.