Grid Emigrant

I would appreciate some advice on selection of a grid free system. During the last loadshedding 3 years ago, I prepared to install a back up power system. I replaced all lights with Led lamps and fitted two 7kw heatpumps for my hot water cylinders and fitted a gas hob (although there is still an electric oven). All the white appliances were replaced with energy efficient items. Loadshedding was discontinued and I never proceeded to install a solar system. My house is currently supplied by Escom power via a three phase DB board. The only other major power user is a pool pump. My plan is to install a grid free system combined with managing power consumption. My questions on how best to achieve this are probably very common ones which have been considered by many members: - how do I decide on a system. It is probably a starting point to look at my current consumption per my City Council electricity bill? - do I install a three phase or a single phase system? - do I first decide on an inverter and then look at solar panels and batteries? - what brand inverter, panels and batteries to purchase for reliability and efficiency? - what type batteries to use? I recall that when I previously considered installing a system, I was advised to buy the cheapest batteries as the technology and pricing was rapidly improving. I would be very grateful for some advice and recommendation of some contact detailss of reputable and experienced installers of solar systems in the Cape Town area. There are are 2 other siblings who are serious about and interested in installing off grid systems and who can benefit from this forum's advice.