Great Britain braced to pay millions for backup electricity during solar eclipse

The government’s electricity grid operator is expected to make multimillion-pound payments to secure electricity at short notice before the moon blocks up to 95% of the sun over parts of the country, the most dramatic solar eclipse visible in Great Britain since 1999. Gas plants are among the generators that are expected to claim payments of more than four times the market price after the grid operator raised an official alarm that it expects there will not be adequate power generation on Wednesday evening. Hotel prices in Europe jump before total solar eclipse The Connah’s Quay gas plant in Flintshire, owned , agreed to generate electricity on Wednesday afternoon for a price of £875 per megawatt-hour, compared with the market price of just below £212/MWh for this evening. The payment suggests that the gas plant may be kept running through the evening to help meet the rising demand for electricity, possibly at even higher prices. The darkening of the skies is expected to wipe out between 300 megawatts (MW) and 1,100MW of solar power, just as the fifth heatwave of the summer raises demand for electricity to run air conditioning, fans and refrigeration systems. The National Energy System Operator (Neso) had initially anticipated an overall shortfall of more than 1,700MW of electricity when compared with the grid’s peak evening demand, according to a warning issued on Tuesday night, or the equivalent capacity of a solar farm the size of 8,500 football pitches. Under a second market notice issued on Wednesday morning, it said the shortfall remained about 1,200MW. A spokesperson described the warning notice as a “routine tool” that meant it was asking the energy market to make any additional capacity the generators might have available. It added that the margin notice was a “precautionary measure to the market” because of the solar eclipse and there was “no risk to customer electricity supplies”. The grid operator later cancelled the alarm. Market data shows that it requested electricity via the high voltage power cables linking the UK to continental Europe totalling 1,200MW for an hour from 4pm this afternoon, 2,550MW between 5pm and 6pm, and 1,200MW between 7pm and 8pm, according to Timothy Santonastaso, an electricity expert at the market data provider Argus Media. Electricity margin notices are relatively common in winter when energy demand is higher, but it is the first time that supply warnings have been issued in summer because of the frequent heatwaves, according to Jess Ralston, the head of energy at the Energy and Climate Intelligence Unit, a thinktank.