I have been using 2x5kw Mercer inverters since 2018 and I have never had issues (touch wood!!!) but I get the feeling that in the main all inverters are generally good but what matters most is the installer. Some bad installers can messy a very good inverter (it could be wrong sizing, pairing with a wrong battery etc). Just like the other member, if I had to install today I would probably go with an inverter that has multiple MPPTs.