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Maximum Demand / ENA / EV Help!

Hello all,


This evenings issue relates to an EV charger install.

The supply cut out is labelled 60/80 amp so I called the DNO and asked if this could be uprated to 100 amp.

They have sent me the ENA EV application form which asks for the Maximum Demand including the new equipment.

The problem I have is the existing circuits are:


32A - 7.2 kW shower 

40A - 8.2 kW shower

32A - Ring main

32A - 7.9 kw cooker

6A - lighting

6A - lighting

6A - security


Additional 32A for EV charger


So even with diversity I'm way over 100A, obviously in reality the diversity calculations are not appropriate as the client has never blown the cut out.

The smaller shower is not currently in use although they want to replace it for another one, I have told them this may not be possible.

The EV charger will have load management but I still need to put a figure on the ENA form....


Help appriciated :)
Parents
  • Therefore should this figure be calculated/provided by the installer as part their job? My understanding being that an additional qualification is required to be able to install EV chargers?

    Clive

     


    Yes, there is lots of criteria for successful OZEV approval,  all of which I have passed. Yes it is my job as the installer to provide that figure. I was just asking the question as to how I should come up with that figure as the regs diversity calculation is not suitable. 


Reply
  • Therefore should this figure be calculated/provided by the installer as part their job? My understanding being that an additional qualification is required to be able to install EV chargers?

    Clive

     


    Yes, there is lots of criteria for successful OZEV approval,  all of which I have passed. Yes it is my job as the installer to provide that figure. I was just asking the question as to how I should come up with that figure as the regs diversity calculation is not suitable. 


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