Honestly, Solax panels have a reputation for being low end inverters. Stay away from them. There are much better budget inverters out there. Jinko panels have come a fair way,…

Nice! Looks pretty good. Will be interesting to see how well the sungrows perform over time.

Legally No, you have a Contract. Your Contract may have exit clauses. have a look.
However, Your solar installer will likely want to upgrade you, because they will make more…