Bear Grylls' 20-acre private island is powered by wind, solar and rainwater: How his family lives off the grid

For TV adventurer Bear Grylls, living close to nature isn’t just limited to trips into the remote wilderness. For part of the year, he retreats with his family to a private island off the coast of North Wales, where the house operates off the national electricity and water grid.

How Bear Grylls’ family keeps their island home off the grid

Known as St Tudwal’s Island West, the 20-acre property sits off the Llŷn Peninsula near Abersoch. Grylls and his wife Shara bought the island in 2001, along with a houseboat on the Thames, after deciding not to buy an expensive London flat.

The combined deal cost less than the apartment they were considering, according to The Economic Times and The Times of India.

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The island’s remote location means the family cannot rely on the conventional networks available in most homes. Instead, the house uses a small wind turbine and solar panels to generate electricity.

Grylls discussed the arrangement in an interview with National Geographic Traveler in 2024, describing the property as completely off the grid. This combination allows a family to power their home without being connected to the national electricity grid.

The system also reflects the practical requirements of living in an exposed coastal location. The family must use the natural resources available on the island rather than being dependent on the infrastructure of the mainland.

Rainwater collected from the roof

Water is another essential part of the island’s self-sustaining arrangement. Grylls said the family collects rainwater from the roof for use on the property. The arrangement takes advantage of the wet Welsh climate, although it also requires planning for periods when supplies may be limited.

The house initially had no running water and restoring the old buildings was a considerable undertaking. In a report published by The Economic Times, Grylls recalled the poor condition of the property when he bought it, describing cottages without electricity, water or proper roofs.

The family eventually converted the derelict buildings into a four-bedroom home.

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Four years of repairs transformed the property

The island was not a ready-made holiday retreat. Its buildings included an old lighthouse and two former lighthouse keepers’ cottages, which were falling into disrepair.

According to The Times of India, Grylls and his friends spent four years renovating the main property. The work has transformed the derelict structures into a home suitable for family stays, although the island’s isolation and unpredictable weather remain part of the experience.

Getting supplies there also required careful planning. Traditionally, the family traveled by boat from the mainland, carrying food and other necessities.

Grylls spoke of the difficulties of transporting the purchases ashore and the lengthy process of obtaining permission to build the slipway.

A family retreat away from everyday demands

The island is more than an exercise in self-sufficiency. Grylls described it as a place where he can get away from filming commitments, meetings and the demands of public life.

In his interview with National Geographic Traveler, he said that the property can feel isolated, but that he values the peace. The family spends part of the year there, enjoying swimming, climbing and being outdoors.

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For Grylls, the appeal lies in the combination of adventure and family life. His island home demonstrates how wind, sunlight and collected rainwater can support a remote property, while also highlighting the preparation and compromises necessary to live off the conventional utility grid.