Another Data point: I have a single LifePower4 48V100A from Signature Solar attached to a Growatt SPF-3000TL LVM-ES inverter. The programming is set to LI and I see the charge current (overall and utility) are both 12A (which cannot be changed when LI battery is configured). Is the BMS forcing the limit or something else? I can of course set the battery type to USE or USE2 (not sure what the difference is) and control the charge current/voltage settings but I like the idea of the inverter getting the battery status directly from the BMS. Is there a firmware update (inverter, BMS or both) that would solve the low charge current issue using Li mode?
I tried using BMS_Test (downloaded from SS's website) but i don't see a setting that limits the charge current (a lot of screens are protected by a password that i'm trying to get from SS).
With the GW SPF 3000TL LVM ES and one EG4 non-LCD, I've had the experience that the GW wants to default to 50a for both max charge and max AC input charge, while the actual charge rate is dictated moment to moment by the EG4 BMS. That would seem to mesh with your experience.
On a 3kw inverter generator, I want Program #11, AC Charge Limit, to be limited to 10amps, not more than 15. I don't care about Program #02, total amperage. You cannot set program #11 through the front panel, as the PDF Manual states. But you can set it through the app. 'growattyyyymmdd' is the password. Then you can 'push' a value of 10, 15, whatever you want. It will immediately adjust to cap at that value.
If you overload the EG4, killing power to the GW, the GW seems to pull the default value when you reboot the battery, I assume from the BMS on the EG4. In any case, it resets #02 & #11. And in that circumstance, at 75% charged, when generator's AC Output was started, the GW started charging the EG4 at 40.x amps, pulling 2.4kw from the generator!
No wonder the 'spec' for the GW3k, is a 10kw generator, according to the Manual.
I am speculating that there is a charging limit setting in the BMS on the EG4 that you can set for charge rate. After all, we know that a lower C rate will cause the pack to last longer. It would be odd that the pack would have a say on AC Charge Rate, rather than just overall charge rate.
Has anyone contacted Seplos, the actual BMS maker for the EG4? Signature Solar staff seem unwilling or unable to provide a real manual for their $1,500+ battery. I have little faith in getting answers.
Note:
I had an issue earlier where the 4/2021 GW w Firmware 51.01/52.01, would _Not_ talk w the EG4 at all. By flashing to 51.05, dated 20220114, it works.
