Tandem solar
Working prototype
- What happened
A LONGi tandem cell reached 35.5% efficiency, a world record, certified by the European Solar Test Installation.
- Why it matters
Oxford PV says its first panels produce up to 20% more energy than a standard silicon panel of the same size.
Oxford PV, 5 Sept 2024- How far from your life
Approved or on sale
Perovskite-on-silicon tandem solar cells is on step 4 of 5. You can get it now, though it may not be common yet.
- Source
“has achieved a power conversion efficiency of 35.5%,”PV Tech, 16 July 2026
The bigger picture
More on Tandem solar
On step 4 of 5: Approved or on sale. Everything we track on it
- On saleCompany-reported
Oxford PV shipped its first commercial tandem panels, with 24.5% module efficiency, to a customer in the US.
Oxford PV, 5 Sept 2024