I had to make an executive decision and Ive specified ALL inverters. Six in all. 1 x 5 Kw, 1 x 3.5 Kw, and 4 x 2.5 Kw

I have also instructed Electrician to provide dedicated circuits for each one, so no cost savings spurring up to a ring main, but then a professional job in the offing.

The location is a high density residential area, so the lower noise aspects, and the modulation controls were obviously a big factor.

Thanks everyone for the input in assisting on this decision.