Recommendation for 15 kilowatts 3 phase inverter and independent MPPTs for 4 strings (45 solar panels)

[snaufal]

Hello,
I presently have a Victron system comprising 3 Multiplus II 5000 (230 V) and 4 MPPTS (2 x 250/85) and (2 x 250/100) + Cerbo gx (European Standard).
Being extremely dissatisfied with Victron's aftersales service (pathetic local technical support and one of the warranty covered MPPTs failed 60 days ago and still no replacement), I am considering replacing it. Any recommendations for a good quality reliable product?

 

[ncsolarelectric]

Grid-tied, yes lots of them. Off-grid, sorry I don't know. I haven't done any off-grid 3-phase systems. I'm waiting for Enphase IQ9s, that will be able to do this.