Okay... but honestly, ....
We here in Normandy, France have been off Grid and On Grid for getting on 20 years. All distribution circuits have main Change over switches and we do not back supply to the Grid utilities, and even if we did the law states only 3kw.
We kept the 9kw Grid connection as rental for the connection is low and the supplier can do a very cheap rate at night.
Also the Grid does mean that we don’t have a large standby generator with all the initial costs and maintenance and fuel required for those emergency situations.
Off Grid we have 30kw PV and 3 off 3.7m dia wind turbines, and in the winter when the sun is grim for days, the turbines keep the 1300ah 48v batteries charged.
We have 12 buildings here, small farm, with 4 Gites, (independent houses), stables, sheep barns, salt swimming pool etc etc.
However, keeping the On Grid connection does mean that we can cope with ordinary public folk who visit and take time understanding about their 5kw 230vac supply for each Gite.
I have decided to retire to another country and sell up here in France, but sadly the French do not get Off Grid or RE systems, yea they talk allot and puff about, but are not willing to learn. So having the On Grid connection means we do not suffer from stupid people when it comes to house purchase folk. We are offering all the RE as is, if the buyer wants. Its mostly my stuff and very costeffective and our sunk costs are very low. And i will offer support for a few months, if they want it.
Our Off Grid system is 24/7 and needs management, and that is difficult to teach the death and stupid.
My new place will be in the wilds but a heck of allot smaller for my age, loads of RE stuff so i can continue my RD etc, the modern version of the PLANTE battery etc.
Everything is possible, just give me time.
3 HughP's 3.7m Wind T's (14 years). 5kW PV on 3 Trackers, (10 yrs). 21kW PV AC coupled SH GTI's. OzInverter created Grid. 1300ah 48v.