Shoto 5.12 issues

I have two of these, installed in November with a 8kW Deye inverter. Two weeks ago one battery died, and my installer collected both for a “firmware update”. They came back the next day working perfectly (for the first time I had working LEDs on both batteries) but the defective unit had been clearly been opened and worked on.

I read elsewhere that there was a bad batch of Shoto’s that came in late last year. Apparently, when used in multi-battery installations the master’s BMS fails and requires replacement. This could be a ticking timebomb for anyone with a single Shoto battery that intends to add another at a later stage. I reached out to the Shoto SA GM to confirm if this is true and suggested a formal recall. He has not responded, so I’m just putting this out there …