Whether you’re an environmentalist or just a bit of a hippy at heart, there’s probably nothing quite like living off-grid. But going off the grid requires serious equipment, and it can cost a lot of money up front. But there are ways to make this lifestyle more affordable.
For example, solar power can be a cost-effective alternative to a conventional electricity generator, especially on a private island that gets plenty of sun. Solar energy systems typically consist of an array of flat panels, also known as photovoltaic cells, that capture a percentage (5-15%) of the sun’s energy. This is then converted into electric power that’s stored in a series of batteries. A back-up power source—like a generator—is then used to fill in the gaps when the solar system can’t keep up with demand or during periods of low sunlight.
In fact, some private islands rely solely on renewable energy to power their homes and resorts. The Isle of Eigg, a 12-square-mile Scottish island with 105 residents, became the world’s first community to switch to entirely off-grid electricity in 2008. Rather than using diesel generators, which are noisy and produce pollution, Eigg uses a combination of hydroelectric power, wind turbines and a large photovoltaic array for its round-the-clock power supply. The island also employs a metering system to ensure that residents aren’t using too much electricity, and two 80kW diesel generators are kept on reserve for days when renewable sources are depleted or for maintenance.
Of course, not every private island has enough sunlight to use solar power alone. But other forms of renewable energy are becoming increasingly popular, especially on islands in the tropics. For example, the founder of Oracle, Larry Ellison, has bought 98% of Lanai island in Hawaii and plans to convert it to 100% renewable energy by 2025.
Wind generators can also be a cost-effective way to go off-grid, and some island resorts are beginning to adopt the technology. On the British Virgin Islands, Peter Island has installed two wind turbines on its waterfront, which generate enough electricity to run all of its facilities—including a helipad!
Finally, some private islands are experimenting with biomass. Biomass refers to the organic matter that a plant or animal produces, and it can be sourced from just about any type of tree, shrub or grass. These renewables can be used to produce electricity in a variety of ways, including running a combined-cycle gas turbine that produces both heat and electricity.
While there are benefits to living off-grid, it’s important to consider all the pros and cons before taking the plunge. As a general rule, off-grid island life is more expensive than living on the mainland, and there are a host of other costs to consider as well. But if you’re willing to do your homework and invest in the right equipment, you can make off-grid living a viable option for your own private island. Just be sure to stock up on plenty of food and water before making the move!