I see what your saying, can't have both to Gyll batteries, I disconnected Gyll's from Growatt due to the firmware shutting down solar when batteries were near full, even know i am running Garage off of Battery, now have gyll batteries hooked to SA along with the inverter, hope this makes sense, Growatt settings are use, not LI, and gyll batteries are 2,3,4 with SA plugged into #2 first. other Growatt setting on "use" for me are 56 bulk, 54 float, 52 back to grid, 53 back to battery,and 51 shut down, Let me know if you need anything else, Joe.