Several real case studies around the world illustrate successful efforts toward energy self-sufficiency. Here are a few examples:

Costa Rica:

• Costa Rica has made significant strides in achieving high levels of renewable energy generation. In 2017, the country ran on 100% renewable electricity for 300 consecutive days. Its energy mix includes hydroelectric, geothermal, wind, and solar power. This achievement demonstrates the potential for small nations to achieve energy self-sufficiency through a diversified renewable energy portfolio.

Island of El Hierro, Spain:

• The island of El Hierro, part of the Canary Islands, implemented a hybrid wind and hydroelectric power system. The Gorona del Viento power plant combines wind turbines with a pumped hydro storage system. This project has enabled El Hierro get further towards its goal of meeting electricity demand entirely from renewable sources and achieving nearly 100% self-sufficiency.

Tesla Gigafactory, Nevada, USA:

• The Tesla Gigafactory in Nevada incorporates renewable energy sources and energy storage to work toward self-sufficiency. The facility utilizes on-site solar panels and energy storage systems, including Powerpacks and Powerwalls, to reduce its dependence on the grid and enhance energy resilience.

Burlington, Vermont, USA:

• Burlington, Vermont, became the first city in the United States to achieve 100% renewable energy for its electricity needs. The city’s energy mix includes hydroelectric, wind, and biomass sources. Burlington’s success showcases the feasibility of transitioning to renewable energy for municipal power needs.

Apple’s Data Center in Maiden, North Carolina:

• Apple’s data center in Maiden facility incorporates a 100-acre, 20-megawatt solar farm and a 10-megawatt biogas fuel cell installation, making it one of the largest privately owned solar farms in the country. The facility utilises energy efficiency measures and purchases additional renewable energy to offset its overall electricity consumption.

These case studies highlight diverse approaches to achieving energy self-sufficiency, incorporating renewable energy sources, energy storage, and energy efficiency measures. While each case is unique, they collectively demonstrate that a transition to more sustainable and self-sufficient energy systems is feasible and can be tailored to different contexts and scales.