Been using it almost a year. It took about 2 months from the time I ordered it in late 2021. No real complaints. I haven't checked on it for a few months now. When I ordered it I had planned on doing something similar to you with a model 3 battery. But the seller ended up falling out after I had ordered the unit. So I have been running 4 48v EG4-LL batteries with 2 in series for 96v. No issues with the inspection. But I am not allowed to back feed so It runs on zero export.