Asda, Amazon and B&Q among retailers in talks to sell devices that feed into household sockets and can cut electricity bills by 30%

• Spanish homes save €10 a month via renewables expansion

Bosses of some of Britain’s biggest retailers are discussing plans with the government to start selling plug-in solar panels as part of a drive to encourage more UK homes to generate their own electricity.

Executives from brands including Currys, B&Q and Amazon met Martin McCluskey, the minister for energy consumers, on Tuesday to discuss guidelines for selling “balcony solar panels” to the British public.

Regulator could do us all a favour with clear multi-year forecasts and breakdowns of electricity pricing

It is easy to predict where the energy regulator will set the next quarterly price cap on Wednesday. It’s just a matter of tracking wholesale prices in Ofgem’s relevant backward-looking “observation period”. Energy consultant Cornwall Insight thinks the typical household bill be £1,850, an increase of £209 from the previous quarter. It will be surprising if it is out by more than a few quid.

One can also make a fair guess at the regulator’s messaging. It will talk about the unavoidable impact from the surge in energy prices that followed the closure of the strait of Hormuz. It may also say the increase would be even greater than 13% without the additional wind and solar generation on the system these days. Fair enough. Gas sets the wholesale price of electricity only 60% of the time now, down from 90% not long ago.