AC300 + 2xB300 discharging from 100% to 99% in UPS mode

Product Discussion BLUETTI AC Series
1

Hi,

I use AC300 in custom UPS mode: 15% - 100%.
I’ve connected a small load(around 150W) but I see periodically battery discharging to 99% from 100% and charging it again. It seems it is not UPS mode, because I have an AC200MAX and it can also work in the same style without UPS mode.
The expectations: UPS mode charges a battery up to 100% work on the grid and switches to the battery when grid power is down. Only after the grid off AC300 will consume the battery capacity.
I’m worrying to not lost my battery capacity when AC300 continuously playing with 1%

IMG_4917
IMG_49171284×2778 229 KB

IMG_4918
IMG_49181284×2778 139 KB

2

@Oleks This is normal. In UPS mode, the inverter is not completely shut down, it is always on standby, so that when your power grid fails, the inverter can quickly switch in and continue to supply power to the load. Therefore, the internal temperature of the machine will still rise, and there will be self-consumption.

2 Likes
3

What about battery life? Is it will still 3500+ cycles up to 80% capacity?

4

@Oleks This behavior does not effect the battery life.