Two installs I am thinking about, one on a caravan site in Wales many years ago when the local village was still on a diesel generator 110 volt DC it charged batteries and lit the ablution blocks at night, actually worked well, wind not solar, were not into solar back in the 50's, but it was enough, however today we have solar powered outside lights and they are a bit useless in the main, clearly designed for the South and in Mid Wales where I live, in the heart of winter even with a PIR the charging is not enough.
The other was the Falklands, most farms used small generators, 3.5 kVA was enough to power a farm house, but not the shearing shed, so there was a 12 kVA option as well, but come bed time and the generator was switched off, candles are a fire hazard, so 12 or 24 volt lighting was a good idea, often a combination of wind and solar, and the one I set up had a bank of Nickel Iron batteries out of a bus, so not being fully recharged was not a problem, it would have been with lead acid, being DC we could use diodes, so each bedroom light was connected also to hall, so if a guest left a light on the hall light would also be lit, so farmer was aware it had been left on, and main reason for turning on light was to go to loo, so want the hall light on as well.
I also connected up a charger for when generator was running, and it was working well.
In the UK both caravans and narrow boats try using solar and wind to maintain their batteries, in both cases they do from time to time have shore/site power to top up the batteries, the panels or wind chargers are easy to access for maintenance, and I would say a caravan or narrow boat forum is the place to visit, no point re-inventing the wheel.
But it is nothing new, I remember being shown the cellar in a farm house full of glass jar type lead acid batteries, which were charged from the generator so the electric lights worked 24/7 even when the generator was not running, from the number likely it was 110 volt DC, but this was in an era when we did not use so much electric as today, the Milk Float of course, so we did have EV's, same with forklift, but in the home cooking was solid fuel, as was heating, no TV or computers, so today that 3.5 kVA generator would likely not be enough.
My son tried it on the cheap with a narrow boat, the 3 kVA with 6 kVA peak inverter did not last long before expensive blue smoke came out of it, so yes there are some cheap inverters, but they can work out expensive. And 3 kVA at 12 volt = 250 amp, you need some large cables for that, I used two 16 mm² in parallel as 25 mm² to hard to get through the boat, I considered since powered by three 120 Ah batteries it could not run for that long to over heat as batteries would fail.
Using 24 or 48 volt would have been better, but you need to look at what is available, 36 volt and 48 volt batteries are used in e-bikes, but can you get an inverter for those voltages. Also better not lead acid as if left discharged it can sulphate, but the newer batteries have special needs for charging, even Nickel Iron was a problem, but they seemed to work OK, not sure if still made, but new very expensive, the ones I used came out of a bus.
I found less 24 volt stuff to 12 volt, so used a centre tapped three wire system, so could use both 12 and 24 volt stuff, lights were the fluorescents out of the bus.
But to use both wind and solar one needs space with access, be it your roof, or garden, the small holding in the Falklands that I worked on had 20,000 acres if some thing went wrong, unlikely to hurt anything, as 4 acres per sheep, not like UK with 4 sheep per acre. And yes my wind charger did destroy its self, but 120 MPH winds were normal.
