A company in Sweden is claiming to have designed a system that can convert 34% of sunlight into solar energy, potentially changing the future of solar power.

Ripasso, the company behind the development, is currently testing the product in South Africa’s Kalahari desert. The 34% power conversion is around double that of normal solar panels, reports The Guardian.

Though the product is new, the idea is actually pretty old. The Guardian notes the idea for the technology was actually developed in the 1800s by a Scottish engineer and clergyman.

This article was originally posted on Fortune.com.

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