Sunsynk 5kw inverter

Have a sunsynk 5kw inverter that I want to get rid off. Was purchased around June 2020 and is still running fine and under 5 year warranty. Earlier this year, I added a second sunsynk in parallel but there seems to be some mismatch between the 2 and occasionally, they will trip if the load increases too rapidly.

R&D says it’s because the models are different. So I got another Sunsynk that matches the one I got in January so that they are then matched. Still need to swap them though.

Price R13500
Location: Fourways, Gauteng but can be shipped for under R500.