Warm Homes Plan

Lord Campbell-Savours Excerpts

Tuesday 27th January 2026 Lords Chamber

[Lord Campbell-Savours (Lab) [V]]

My Lords, I welcome the Government’s emphasis on solar. Is my noble friend following developments in the use of perovskite, a material that potentially greatly increases solar panel efficiency by as much as 30%, while reducing panel manufacturing costs? Are we monitoring the work being carried out by Oxford PV, a company—among others—at the forefront of the development of this technology? Can we be assured that, if it turns out to be commercially viable, we will back manufacture of the product in the United Kingdom and not leave it to the Germans or Chinese to take control of the market?

[Lord Whitehead (Lab)]

I thank the noble Lord for his question. It might be helpful if I go into a brief disquisition on perovskite and its qualities, to inform the House about the noble Lord’s question.

Perovskite is, quite simply, a wonder product in terms of solar development. It is a mineral, but largely made synthetically, and manages to trap a wider spectrum of the sun’s rays than traditional silica does. So-called tandem panels which have a silica panel underneath and a perovskite film on top have an increased efficiency of 20% to 30%—which is a fantastic addition. With solar on a field basis, far more power can be got out of a smaller series of solar arrays. As far as home solar is concerned, an enormous boost can be achieved—perhaps half the power used can be got from the roof, with the same amount of solar panels than would have been put on previously. It is a very exciting development.

Oxford PV is the company spin-out from Oxford University, which is engaging in the development and commercialisation of those tandem panels. There is also a pilot production line under way in Germany.

The Government have been very supportive of Oxford PV in its journey. There was an original grant for Oxford PV of, I think, £668,000 in 2014 and there have been grants from UKRI subsequently. Oxford PV is presently in some discussions with the Department for Business and Trade, as this is something that we very much look forward to developing for the great advantage of the solar world generally. I assure the noble Lord that the Government are active in this pursuit, with the prizes that it can bring.