Zialmen

@Ryan
Hoymiles works brilliantly for your application.
It's also NRS -2- 1:2017 certified.
We have used it on multiple projects with Victron. Latest was +-25kW. It supports frequency shifting to throttle when the batteries/loads don't require so much PV power.
It's also a lot cheaper than Enphase since there are multiple panels connected to one micro - either 2 or 4 panels.
https://www.ellies.co.za/product-category/renewable-energy/inverters/micro-inverters/
 

Well, that's somewhat of a contradiction in terms. Off grid means batteries. Batteries means significant capacity, and that means heavier hardware. So no real micro option (not nearly to the same extent as a small box behind the PV module!).
EnPhase and APSystems are both grid-tied microinverters.
Microinverters can sometimes work WITH another battery inverter, so that when the grid goes out they tie with the battery inverter. I think only the Enphase and the Hoymiles can do this.
Victron is fairly modular in the sense that you can put inverters in parallel, you can add more solar later (just add an MPPT), and so on, but it really depends on your constraints. One reason people look at microinverters is cost... you can literally expand your generation a panel or two at a time, you simply bolt a micro-inverter to to bottom. Very cool idea... but it not if you have power failures.
Again, it depends what you want to do. If failures are infrequent, your backup load is small, and your primary motivation is saving money: Get a smaller UPS for backup, and install the micro inverters you wanted to in the first place.

@Ryan
Hoymiles works brilliantly for your application.
It's also NRS -2- 1:2017 certified.
We have used it on multiple projects with Victron. Latest was +-25kW. It supports frequency shifting to throttle when the batteries/loads don't require so much PV power.
It's also a lot cheaper than Enphase since there are multiple panels connected to one micro - either 2 or 4 panels.
https://www.ellies.co.za/product-category/renewable-energy/inverters/micro-inverters/
 

The Hoymiles microinverters can change their output based on frequency shifting. We have used them with the attached VDE standard on a Victron inverter - works perfectly.
They are also able to throttle production to match consumption. The unique thing is that they throttle production on each phase to match consumption on each phase; unlike string inverters which throttle to the average or minimum phase consumption.
From our experience, these microinverters have a much lower failure rate than other MLPE solutions we've used. To date, we haven't experienced a failure.
 
0FBIAM3RS (2).pdf0FBIADTUARG (1).pdfVDE-AR-N_4105_active power feed-in overfrequency.pdf