Sustainability
The Flat Holm project aims to develop the island as a showcase of sustainable technologies. The original power supply consisted of several diesel generators at different properties and unconnected to each other. In 2006, underground cables were installed to form a ‘mini-grid’ between the farmhouse, workshops and the fog horn keeper's cottage. This was powered with a (13.5 kW) inverter/charger system located at the farmhouse with the farmhouse diesel generator as back-up.
In 2007 the system was extended to include a battery bank charged by two photovoltaic solar arrays, and by a 6 kW wind turbine sited at a redundant telecommunications tower on the high point of the island.
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