I've been very impressed with solax customer service, hence this review.
So saying, I'm generally a fan of solax products. When we had solar panels installed in 2018, they were installed with a solax inverter, and then a couple of years later we installed two solax triple power batteries with a separate inverter. Both inverters have worked flawlessly and I've been impressed with the Solax app for managing batteries and solar arrays. Last year's app update was glitchy, but eventually I managed to get everything working fine again after a few emails to customer service.

This year I noticed that that the capacity of our T45 batteries had dropped significantly. When I contacted customer services I was told that this was the result of a firmware update designed to extend the batteries' lifespan. At the cost of ~30% capacity. Not good.

After a number of emails, Solax agreed to do a warranty replacement with two refurbished T58 batteries. Yes, I had to pay installers to do the swap, but now all is resolved.

Ideally things would never go wrong, but my experience with solax when things have gone wrong had been very positive.