In an energy-mixed twist of fate and sign of the times, the Big Pit visitor’s site, part of Wales’ National Coal Museum, has begun running on solar power instead of the country’s oldest fossil fuel source.

According to the UK’s Daily Mail, Bit Pit will install 200 solar panels to provide more than 6% of the facility’s power needs.

Reaction from ex-miners and community members has been mixed, but museum manager Peter Walker expressed a philosophical, long-range view of the site’s evolution.

“Coal is such an important part of Wales’ heritage and yet green energy will play a major part in its future,” he told the London-based daily.

“A solar-powered coal mining museum is a fantastic way to celebrate this national journey.”

Big Pit is a functioning coal mine that offers daily multimedia tours allowing guests to penetrate 300 feet underground with a professional miner.

The museum is set in a unique industrial landscape, designated a World Heritage Site by UNESCO in 2000 in recognition of its international importance to the process of industrialization through iron and coal production.

Big Pit is also an anchor point on the European Route of Industrial Heritage, which is comprised of 850 sites in 32 countries across the continent.