Hi,
I recently purchased an AC300 + B300. Used essentially in Custom UPS mode.
All functions are perfect, except this behavior I find confusing : current is pulled from the grid to power the AC load almost at any time, regardless the “charge from grid” and “time of use” settings.
I think it should not behave like this in “peak-time (discharge)” period.
In other words : from my experiments it seems like the settings “charge from grid” and “Time of Use” act essentially on the battery charging conditions. But regardless, there is a direct path for the AC300 to use grid power at any time to contribute powering the load.
This is not documented and looks not controllable except by physically disconnecting from the grid source… which is non-convenient.
In other simpler words, the AC300 is missing a setting to control how/when the grid input can be used to power directly the AC load.
Another thing noted, of lesser importance : the switching from off-peak to peak does not look accurate to the minute…
Demo behavior in the pictures below.
Could @BLUETTI comment on this and possibly add a control more to enforce at least “peak time = no grid usage at all” if I need it so ?
it seems that my new AC500 + B300S has the same “fault”.
I have to test it a bit more until I’m really familiar with the AC500.
“Charging from grid” is always OFF.
I’m using time control UPS or custom control UPS and I cannot
see a difference in the behaviour of the AC500.
Obviously (I must test it repeatedly) the following happens:
When entering peak time and SOC is below SOC_max
charging from grid continues.
Setting the SOC_max lower than SOC stops charging from grid.
When entering peak time and SOC is equal (or higher?) than SOC_max
there is charging from grid if there is AC output.
(Watt charged seems to be equal to Watt output + loss by inversion.)
As if the system will prevent that SOC falls under SOC_max.
AC input shows reactive power. You can provide the SN and firmware version and try to upgrade to the latest firmware.
The system time of the machine may be different from the actual time. Please check the time settings on the machine and reset them according to the actual time.
One question : do you think the new FW will also solve another problem I just see : AC300 does not automatically raise the qty of power pulled from solar panels to follow a suddenly raising AC load demand.
I’ve seen this a couple of times ultimately : AC300 prefers continuing using battery power (to the point to drain it significantly!) instead of exploiting the available sun power.
To palliate it you have to manually trick it so it changes to a normal/desirable behavior : trick = turn off the AC load, wait for solar input usage to raise, then switch AC load back on.
This is pretty unfortunate because say a load is consuming essentially in daytime then the battery can get drained until the evening, and then there is no power left for the night … Whereas daily available solar power could have been used instead (and the battery level preserved safe for night usage).
Illustration in the images below. Another trick is to disconnect the solar panels and reconnecting them…
@BLUETTI , I tried but cannot upgrade firmware, did you push it?
My app is connected to my account.
I did connect to AC300 via Bluetooth, then went “About Device” → there is no button to download or upgrade.
Otherwise the menu “Version” was changed to “Firmware upgrade”, but once in there, no download button to be found either…
Then I went to Battery Information, there was a new button “Check for update”, which I clicked, but it told I was up to date (and BMS version did not change)
Summary : nothing changed. IoT, ARM, DSP and BMS remained the same as they were.
See screen copies below.
Have I done anything wrong?
@BLUETTI_CARE, I did the update (thanks!) and the AC300 looks like behaving just great now!
Cherry on the cake, it looks like exploiting my solar panels even better than I had ever seen before: pulling 2.3kW out of the max. 2.4kW of my 6 panels, and the sun was hazy today…
So, I do confirm it now behaves as expected for solar power usage:
at all times exploiting the max. possible of the solar panels for both charging and powering the AC load
when 100% SoC is reached, AC300 returns for some time to using only the batteries to power the AC load (PV=0W), but as soon as SoC is down to 99%, PV usage is restored (full power) and batteries quickly restored to 100% while the load is also powered.
I have the same issue, with a slight variation. I’m on version AC300, DSP V4031.30. Though my “Grid” shows no power being pulled in the app or physical panel. My wall outlet meter shows about half the power being pulled from the grid. This is fhe only device connected. I’ve tried many configurations and the issue remains. What are my options?
Hi @JohnnyMnemonic, We would like to know how your system is set up. Are you using PV priority mode? When the issue occurs, what is the SOC of your AC300? Also, what is the power reading on your wall outlet meter?
