The home has a built in photovoltaic power supply, which uses sunlight to generate electricity.
The company behind the project says the house produces excess energy that can be fed back into the electricity grid, potentially earning its occupants up to £1,000 a year.
- The windows are triple-glazed. The house is thoroughly insulated through out and features low-power LED lighting.
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An Assembly committee says the Welsh Government's flagship Flying Start programme needs to reach more children in need.
The trust says more visitors than ever are making their way to Pen y Fan, prompting an appeal to repair footpaths on the mountains.
It will be played in May.