Maximum Demand / ENA / EV Help!

Chris Pearson:

<SNIP>

SSE allowed me up to 30 kVA ADMD "for the entire development". Perhaps they thought that I was going to build a few houses instead of a garage extension. ?

Or perhaps a garage extension is presumed to have an EVCP, which seems to gobble up more leccy than everything else put together.


 

well 130A for short periods (30,000/230V) seems a safe limit if you have 100A fuse, you wont exceed that for more than perhaps 20 minutes. !!!!

That link is interesting, Western power seem to have a different method to some of the other DNOs

I agree on the annual consumption estimates.looking rather  high. I suspect there is not enough real data yet to allow then to do anything other than  bung in a large number and hope it is enough, or maybe they are expecting or hoping to encourage that most home charge points end up being  the 10-20A sort of range, not the 7Kw 32A ones - after all they do not meter at the street or town level and much domestic metering is averages over a long period, not half hourly


I think DZs predictions are a bit dramatic - but only because I predict that the forecast numbers  for electric cars by 2030 will be missed, and substantially, except perhaps in cities like London,  and that once a few substations have caught fire, the govt will need to be tapped up for a street main renewal scheme to rival that of the removal of cast iron from the underground  gas network.

Right now the govt is only vaguely aware of the can of worms they have opened ( pages 43-45 of this policy exchange docuement scratch the surface)


M.

PS to DG4, I think we all agree you want a 100A fuse fitting. The network that supplies it is luckily not your problem.

Chris Pearson:

<SNIP>

SSE allowed me up to 30 kVA ADMD "for the entire development". Perhaps they thought that I was going to build a few houses instead of a garage extension. ?

Or perhaps a garage extension is presumed to have an EVCP, which seems to gobble up more leccy than everything else put together.


 

well 130A for short periods (30,000/230V) seems a safe limit if you have 100A fuse, you wont exceed that for more than perhaps 20 minutes. !!!!

That link is interesting, Western power seem to have a different method to some of the other DNOs

I agree on the annual consumption estimates.looking rather  high. I suspect there is not enough real data yet to allow then to do anything other than  bung in a large number and hope it is enough, or maybe they are expecting or hoping to encourage that most home charge points end up being  the 10-20A sort of range, not the 7Kw 32A ones - after all they do not meter at the street or town level and much domestic metering is averages over a long period, not half hourly


I think DZs predictions are a bit dramatic - but only because I predict that the forecast numbers  for electric cars by 2030 will be missed, and substantially, except perhaps in cities like London,  and that once a few substations have caught fire, the govt will need to be tapped up for a street main renewal scheme to rival that of the removal of cast iron from the underground  gas network.

Right now the govt is only vaguely aware of the can of worms they have opened ( pages 43-45 of this policy exchange docuement scratch the surface)


M.

PS to DG4, I think we all agree you want a 100A fuse fitting. The network that supplies it is luckily not your problem.