The Available Supply Capacity (ASC) is a promise from the network to guarantee a volume of power to your site.   It is the maximum allocation of electricity you can draw from the grid at any one time and means the infrastructure that carries electricity from the point of generation to your premises will function correctly.

The allocation is measured in KVa (kilovolt-ampere).  All half hourly settled supplies are allocated a specific supply capacity and are charged for that capacity, expressed as £s per KVa in their energy bills. The payment is made to the supplier but they are only passing through the charges that are made from the distribution company.

Recently two new clients came to us and during the course of reviewing their current energy supplies we noticed issues with their supply capacity. One had too much capacity apportioned to their supply, the other had too little.

Exceeding the ASC for your meter could cause disruption to your appliances on site or even power cuts in your area.   If your overuse causes a power outage you could be liable for the costs incurred by the distribution company.  Alternatively, if the demand for electricity in your area increases, your local distribution could charge penalty rates for the excess used at your premises.

Setting the ASC correctly is important.    If the capacity is too low, you could be liable to penalty rates for exceeding the level set, but if the ASC level is set too high you could be charged £000’s for capacity you will never use. In one of our most recent cases there was a potential saving of more than £60,000 per annum for kVA charges they never used.

If you want to know if this affects you, take a look at your electricity bill.  Anyone with a half hourly electricity meter will have an ASC which will be itemised on their electricity bill as kVA.  If you need any assistance ensuring you’re being appropriately charged, please contact us – we’d be happy to help.

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