Good day, I am reaching out on behalf of our engineering consultancy firm. we did a solar installation for a client; however we have been facing some issues with the it for the longest while. No matter what we do it isn't rectifying - Specifically with the battery and inverter. the system just keeps shutting down after we put on the 2 Air conditioning loads and a kitchen fan. (POW-HVM6.2M-48V-N hybrid inverter and the POW-LIO48200-15S battery.) Also, I am trying to establish communication between the POW-HVM6.2M-48V-N hybrid inverter and the POW-LIO48200-15S battery. We are unable to access the LIC, LIP and LIL options in setting 05, we are getting all the other options but not those. Can I have some guidance on this please?

Sounds like the inverter and or battery is overloaded / undersized to be able to carry the load?

This is maybe why it shuts down? or the max discharge rate of the battery(s) is being exceeded, and thus the inverter and battery are turning off? Also is the solar producing at the same time? or is it purely a ups config, no solar panels? battery and inverter only? if so max discharge rate will limit you and also inverter output limits?

What size /rating / type of aircons? 24000btu? 18000 bth 12000btu? Traditional aircon, or inverter type of aircon? Startup currents required by each aircon? What is the load that's being carried by the inverter and battery, before turning on the aircon? Aircon startup loads could be exceeding the inverter / battery max output, also if a traditional aircon, when the compressor turns on and off and on, the power needs can spike briefly and overload the inverter & or battery.

If you have the comms cable connected from the battery to Inverter, it may disable you being able to set the battery type on the inverter. However it you overstate these settings, on the inverter, you could possibly damage your battery and its warranty.

Probably the best will be to check with your installer/supplier, share your design docs etc and they will probably be able to advise best.