Registration for Cyd Cymru opens today and will run for six weeks. Here's how the collective works:
- Residents register providing as much information as possible about their energy use
- Once registration is closed, data is collated and presented for an 'energy auction'
- Energy companies offer their best prices to the collective
- New tariffs are offered based on registration data
More top news
Gravitational waves were predicted by Einstein but have never been spotted. Welsh physicists are modelling their astronomical sources.
Fly-half Dan Biggar remains on the road to recovery ahead of Wales' Six Nations clash against Scotland this weekend.
Manufacturers and unions have accused ministers of failing to protect the steel industry from cheap Chinese imports.