ToeKnee

My (limited) experience with Sunsynk makes it my recommendation.  Easy Interface and relatively simple to change the settings as you become more experienced with the system.
If you need an 8kVA Inverter, the 10KW of batteries may be a bit shy when you want to run off solar (if that ever happens) 
But if you just want plugs and lights, you could save a few pennies by a 5kVA Inverter. (if you think solar will never happen)
 
 

I purchased one of these
Works like a dream and I use it to work out when to switch my geysers on to get the max out of my solar.
 

No problem as long as you stay inside the Inverter output rating.
I use it for my 3kW Geyser element as well. It's a matter of managing your consumption with the available energy.