To your original question; Yes, I do think about it. I might consider it for adding future battery capacity by using a whole EV battery pack. There would be some work to get the CAN / rs485 messages that the inverter would expect to see, and translate them from the EV battery BMS, as well as control the battery pack contactors.
Hmm, the GE sheets say GoodWe on them. Approved battery options are BYD, GoodWe, LG RESU.
The LG batteries have been sold for a while by solar installers, probably the BMS CAN communication for them is available? One could make something to bridge from an EV battery BMS, pretending to be an LG battery and then it might work?