Last month I needed to calculate Maximum Demand for my house. This is a technical assessment which adds up all the electrical devices, socket outlets and lights to arrive at an MD which truly reflects the possible peak current. This can’t be calculated from a Smart Meter because that shows half-hourly averages.
My 3-storey house with 280m² floor-area, two workshops, 5 power rings and two electric ovens has an MD of just 19.6 Amps.
This illustration of MD shows how the UK electricity demand would be more than doubled if we move along the Government’s Net Zero timescale for phasing out ICE transportation in favour of EVs.
So in my case, adding a 7.5kW EV charge-point to the house last month takes my MD from 19.6A to 51.6A
There are two separate calculations to be considered:
a: Do our houses have adequately-sized conductors to deliver the current required for houses with EV charge-points fed from the local substation?
b: Is there enough capacity to get that power through the 33kV and 11kV Distribution Grid to those substations?
The answer to both is NO.
This is where Kaluza’s Flex Platform could provide the answer, using intelligent load-control to better utilise those times when the infrastructure is lightly loaded.
However, only one of Kaluza’s Trials has addressed the above two calculations thus far. That’s the one in the Woodhall Spa area of Lincolnshire using Sönnen Storage Batteries.
Until OVO/Kaluza start addressing local grid-support, the algorithms which the country urgently needs aren’t being created.
Instead, the dominant supply/demand data being used by Flex is the UK-wide overview provided by National Grid.