Hi, first time posting here. We are an off-grid school in rural Guatemala. Our system includes a multiplus-II 48/10000/140 inverter, 120/240|100 autotransformer, mppt 250 charge controllers, lynx distributor 1000, cerbo gx, and soluna 5kw lithium batteries. The system has been working fine for over 2 years with the exception of a battery malfunction a few months ago. Suddenly this morning the inverter shut off and despite repeated efforts to restart the system it won’t turn back on.
What we’ve tried so far:
- review the history of use in the vrm portal - at the moment it died, it showed batteries were charged to 96% and energy consumption was at 1257w which is well below the 9kw threshold of the inverter and solar production was 1303w; there were no entries in alarm log or event log either
- shut off everything with a switch or breaker, including the battery tower and the main breakers to the buildings, and disconnected the cerbo; waited 10 minutes, then turned on the charge controllers, autotransformer, and batteries in that order; once batteries were all lit up, turned on the inverter to position 1 - at this point nothing happened, no lights or sound from the inverter
- went through all the steps as before again except this time as suggested in another post, turned the inverter to position 2 (charge only) - again nothing happened
I’m waiting for tech support from the vendor but they’ve told me to do these same steps and they’re about 6 hours away so who knows when they’ll be able to make the trip. I’m not sure what else to try now so any guidance is much appreciated. Thanks!