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EV max demand vs. Normal high load reporting to DNO

Hi, 

A question that’s bugging me, if anyone can comment. 

We are required to notify the DNO if the maximum demand exceeds 60amps, when installing an EV charger (unless there is load management built into the EV charger). 

What I am trying to understand is how a load in excess of 60amp caused by an EV charger differs from normal, high power loads within a property. 

If we have for example: 

An induction hob/oven on a 32A circuit 

Spa/Hot tub on a 32A circuit 

Heater on a 13A plug top 

Our demand here would be 77A (plus or minus pending how the hob/tub/heater is switching its outputs - either way, it would be above 60amp give or take. 

Why doesn’t this need notifying? 

If a house with minimal loading reaches 28A and the EV charger reaches 32A, the total demand on the network is still only 60A, much less than the 77A taken in the first scenario. 

Why notify one and not the other? 

A consumer should be able to draw up to the maximum rating of the fuse surely, but is there a “limit“ when the DNO needs to be told? 

Thanks. 

Parents
  • I have several times explained that this is going to go horribly wrong and quite soon. There is little reason to ask the DNO, they are not really in a position to do much at all, because the entire supply system is fairly close to breaking point. It was never designed for these large continuous loads from domestic properties, and to start to change that would be ruinously expensive. The question of who pays to cost, probably £3 Trillion, and the immense disruption everywhere is the question to ask your MP, along with where the labour and skills necessary are going to come from. Maybe this is what then mean by highly skilled “Green” jobs being created, we need huge capacity in making large transformers, cables, construction civils,  road barriers and traffic cones! The raw materials are not available on the world market, and reducing oil refining will make the insulation in short supply too.

    This is far too large a problem for MPs to understand, and can the public understand the size of the mess they will create when taking advice from accountants and “Green experts" who don't have a clue either? Good luck there then! They certainly don't listen to the professionals, but then neither do the journos writing E&T!

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  • I have several times explained that this is going to go horribly wrong and quite soon. There is little reason to ask the DNO, they are not really in a position to do much at all, because the entire supply system is fairly close to breaking point. It was never designed for these large continuous loads from domestic properties, and to start to change that would be ruinously expensive. The question of who pays to cost, probably £3 Trillion, and the immense disruption everywhere is the question to ask your MP, along with where the labour and skills necessary are going to come from. Maybe this is what then mean by highly skilled “Green” jobs being created, we need huge capacity in making large transformers, cables, construction civils,  road barriers and traffic cones! The raw materials are not available on the world market, and reducing oil refining will make the insulation in short supply too.

    This is far too large a problem for MPs to understand, and can the public understand the size of the mess they will create when taking advice from accountants and “Green experts" who don't have a clue either? Good luck there then! They certainly don't listen to the professionals, but then neither do the journos writing E&T!

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