My two powerwall 2 were left on while waiting for approval from Edison. Took about 9 weeks, since they updated the NEM agreement and I had to start all over midway through.
Batteries were installed with 30% charge and drained to 0% but stayed there for weeks with green lights. Finally turned them off after speaking with support and when I got approval today the monitor app no longer works and the batteries don't charge.
Was told that a fw update was needed, but a little worried they were left discharged too long.
Thanks for any information in advance.