JacquesVT

Hi everyone, I'm so new to this forum and also to solar! Okay so I have a butchery. I installed a luxpower 5.5kw inverter, and 5kw Greenrich lithium battery in our office, without any panels. I did this to act as UPS backup when loadshedding hits. Okay so I installed myself, the company I bought the system from did the inverter settings, and checked my installation. Everything works as supposed to, but after the installation, we started getting issues. We have 4 computers, one blown a power supply, we have an old school till, which keeps on blowing fuses, and an amp also keeps on blowing fuses. We checked the connections, input voltage and wiring, all is perfect. The only solution thus far, is I wired in our old online ups AFTER the inverter. But the moment I remove it, fuses keeps blowing again. I also noticed that sometimes when loadsheddding hits, the ups complains about no power supply, so somehow the inverter disconnects the power too? This all happens either with the eskom to loadshedding changeover, or with loadshedding to eskom. In other words, with the changeovers. Can anyone maybe help me on a solution, with this? I did a google search yesterday, and came across 2 posts on this forum about the same issue of blowing fuses, same brand inverter too. But both didn't have replies. Anyone can guide me? Thanks