For domestic level kit it's just the normal grid-island protection built-in to an approved inverter plus surge suppression, proper grounding arrangements and Type-B RCDs. Check out the PEA website, there's a bunch of stuff there, in Thai of course.
If you go large, then there's a whole new world of hurt!
Do let us know how you get on, if PEA/MEA are actually making life easier to get on the export wagon that's really good news.