I have 4kW of Solar PV connected to a Sofar HYD6000-ES and 4 x US3000 batteries.
It seems to be working fine but I may add an ME3000SP and swap the batteries to that because in the UK I'm not allowed to charge the batteries during off-peak electric because it will discharge through the solar meter and show up as extra generation.
What I don't like is that battery discharge is limited to 3kW (on both models) which means I have to buy from the grid even though the batteries may be full.
Andy