Hi,
I live in France ( Voltage 240 / 50 Hz), Actually GRID Voltage varies 232.7 Volts to 234 volts. and Frequency 49.96 to 49.98 Hz.
I bought an Inverter 3200Watts Max generator.
I will use it at 1500 Watts Max.
I configure my AC300 in Mode: “UPS Enable”.
I start my generatorand wait 3 minutes for preheating.
I use the same power cable ( On CP1 connector) from the GRID to connect my generator (Switch sources).
I limited the amperage to 6 amps. that is to say: 1200 Watts in 240 Volts.
On the lcd display I visualize (Grid details) that I have a small voltage fluctuation that varies from 232 volts to 233.5 volts.
The frequency also varies from 49,7 Hz to 50,04 Hz.
The Bluetti AC300 triggers the charging from time to time and stops randomly.
Otherwise, it charges between 1180 Watts and 1205 Watts, perfect for me.
My question: What are the allowed fluctuation values for an inverter generator?
Why the AC300 don’t work normaly with my generator Inverter " pure sinusoidale"
Is it necessary a special cable? a special mode of use?
Is it possible i had a second stabilisator just after my generator Inverter ?
Thank you for all your help.
@Jean-pascal The allowed fluctuation values are as follows
196-253V,47-53HZ,
Is your machine software up to date? (see if there is an update option, if not, it is the latest)
Hi, thanks for your help, 
196- 253V only One Phase ? … Because…
I continued my research and discovered this. This must explain " Perhaps" why the buletti does not trigger the charge?
My generator inverter , don’t delivere 220Volt on single phase.
According to my measurements, it provides 2 x 110V.
I suppose that the phase provides for example the positive amplitude and the neutral the negative amplitude to form the sine wave?
On Monday I will contact the manufacturer of my generator.
The same inverter output two 110V, phase difference of 180 degrees will be available
The same inverter output two 110V, phase difference of 180 degrees will be available
Hi,
Is this compatible with charging the Bluetti AC300 please?
Thanks for your help
@Jean-pascal Yes. Turn the input current to 1A and try again. Is the software version the latest version? If not, I can have engineer push to you separately.
@Jean-pascal Yes. Turn the input current to 1A and try again. Is the software version the latest version? If not, I can have engineer push to you separately.
Hi,
I tested with a current of 4A, the Bluetti charged both batteries for 30 minutes. Then it stopped charging and a few minutes later it resumed charging for about 25 minutes.
This works, but not optimally.
A new firmware has just been released, I will have to test it.
For the moment, it works but I think that with another Inverter generator (real single phase), it should be better.
My question: Which Inverter generator between 2.2 KW or 3.2 KW 220 Volts single phase can I buy?
Who would have tested 
**HONDA EU 22i or the HONDA **
Hyundai HG4000I AR1 inverter 3300w
SCHEPPACH SG3400i - 2800W / 3400W
FEIDER inverter FGHi3500 3300 W
It is only a backup in case of a big power cut.
Thanks for all helps
I just did the test.
My entire Bluetti AC300 + (2x300) configuration is up to date ARM Version: 4037.07.
I have set 5A and I have removed the generator fuel earth connection from the earth.
I put the AC300 in standard UPS mode.
I started my generator (+ preheating) and after 3 to 4 minutes, the AC300 started to load (power: 1050 to 1080 Watts).
It worked for an hour (Perfect :) ), because I had to stop it because for me, everything is now working fine. :)
I noticed that if I limit the Bluettti AC300 to 5A, it charges perfectly and my generator is very stable at this power 5A. 
Many thanks for your help and bluetti service also. 
This is the answer of service Bluetti:
