Specification for a Solar System

Solarchaser

Grumpy_chap said:

Give me an idea, though:
https://www.autotrader.co.uk/car-details/202105032149899
Big battery with a free car!

Since that's the old car with the old battery chemistry and 10 years old, I wouldn't necessarily hold out much hope for it being a big battery, 8/12 bars, so it's lost dome range, and mileage (my 24kw gets 85miles in summer) but it is cheapy cheap cheap

QrizB

Grumpy_chap said:

Give me an idea, though:
https://www.autotrader.co.uk/car-details/202105032149899
Big battery with a free car!

In case anyone has missed it, here's an Irish guy with a bold approach to V2H: run your appliances on 350VDC.

https://www.youtube.com/watch?v=QlmmerXOkuE

It starts a bit slow but you can skip to the good bits.

Martyn1981

Hiya QrizB, I don't pretend to understand DC (nor AC) but reading the conversations from the off-gridders, I recall many 'praising' the bravery of one (ironically in Ireland) running his house (or at least his battery system) at 110V, when most operate at 48V.
Does DC get 'trickier' at higher voltages, and if so, should 350V be really scary?

Verdigris

Does DC get 'trickier' at higher voltages, and if so, should 350V be really scary?

Yes and no. There is an argument that you can "let go" of an AC source as the voltage varies, on the other hand the rapid muscle contractions can be extremely damaging. Basically both should be treated with a lot of respect at those sorts of levels.

QrizB

Martyn1981 said:

Does DC get 'trickier' at higher voltages, and if so, should 350V be really scary?

I'm definiely not an electrical engineer but from a layman's point of view, higher voltages are all unpleasant and AC vs DC isn't a huge factor. It will all kill you if you're careless or just plain unfortunate. I wouldn't personally recommend running AC appliances on DC or vice-versa.

Martyn1981

QrizB said:

Martyn1981 said:

Does DC get 'trickier' at higher voltages, and if so, should 350V be really scary?

I'm definiely not an electrical engineer but from a layman's point of view, higher voltages are all unpleasant and AC vs DC isn't a huge factor. It will all kill you if you're careless or just plain unfortunate. I wouldn't personally recommend running AC appliances on DC or vice-versa.

Sorry, what I meant by 'trickier' was the issues around the batts, main cables, and switches etc, as I think I remember hearing that DC can jump larger gaps, so switches (etc) have to be physically larger. But, and this is a big BUTT, I may have misunderstood this completely.