I already have an EB70 an like it very much (except for the missing SOC percentage).
I received an EB3A recently. It’s a european version (230V) and has got the latest firmware, which in Europe is
Short Version: As long as the solar panels deliver less than ca. 18W, it won’t start charging at all. The “Input” sign in the display blinks and the app says “PV low voltage error”.
The EB70 has no problem at all to start charging in this situation.
The open circuit voltage in this case is usually about 22,4 V, so it should be plenty enough.
One the EB3A has started to charge, it will continue to do so even when the power drops to 1W.
If I then unplug the panel and plug it back in, the error appears again and I have to wait till the power exceeds ca. 18W.
Conclusion: My EB3A has no problem to charge via solar, but it has problems to start charging.
My EB70 start charging even when there is only 1W available.
In real life this can mean that on a cloudy day the EB3A does never start to charge but instead uses up about 2% battery per hour and so loses power over the day instead of collecting e.g. 16 watts per hour.
This may seem like am minor problem because <18W is not much, but I guess that most of the small power stations will not be attached to huge solar arrays.
With this error the EB3A can’t just be left alone gathering watt hours…
Is this a known problem with the EB3A an can/will this be fixed in firmware? Or is my unit faulty?
By the way: I have charged and discharged the device twice and once it charges it works fine. AC charging also works fine.
I wish it would charge just as the EB70, then it would be a great litte device with only minor flaws (funny fan noises, noch charge under 10W displayed etc.).
Thanks to Bluetti and the community (hopefully) for answers.
Cheers from Germany,