Giant Batteries Are Transforming the Way the U.S. Uses Electricity

Three startups in Houston are using a technique similar to fracking, a practice used in the oil and gas industry, to store renewable energy without batteries. They use excess renewable energy to pump pressurized water into manmade caverns underground. When energy is needed, they open the caverns, sending the water back to the surface to turn a turbine and generate power.

A regional cap-and-trade program in the northeast United States has reduced carbon dioxide emissions from power plants and led to overall job gains in the economy. Up to 50 percent of the region’s CO2 reductions are attributable to the Regional Greenhouse Gas Initiative program and nine of the states participating report training more than 8,000 workers.

Micro-hydro projects in the United States have become much more accessible and more financially viable since Congress passed a law in 2013 making it easier for small hydroelectric projects to get federal approval. Specifically, water treatment plants that can retrofit their systems to generate electricity are an excellent energy opportunity. The plant in Grand Lake now produces more electricity than it consumes.

Facing sky-high utility costs and accessibility challenges, the community of Molokaʻi, Hawaii, took their energy security into their own hands and developed an energy-resilience-focused action plan. Backed by the primary state utility, the community is installing solar arrays and batteries, some of which are collectively owned and subscription-based. At the same time, the solar cooperative is cultivating a local workforce specialized in solar infrastructure.

Eversource Energy, a utility company in Massachusetts, installed a networked geothermal system that provides heat for residential and commercial buildings across the city of Framingham. The connected system allows excess heat from one building to be redirected to another that needs it. It’s the first of its kind in the United States.

A utility company in Framingham, Massachusetts, worked with climate advocates to build a unique geothermal heating and cooling project that spans a whole neighborhood. A group of residential and commercial buildings share the infrastructure necessary to harness stable underground temperatures for heating and cooling, which reduces their greenhouse gas emissions and energy bills.

Thermal storage technologies are lowering businesses’ energy costs and carbon emissions while reducing strain on the grid during peak times. Two hotels in California implemented a system that makes ice when energy demand is low and uses the ice during peak demand times to cool the building.

A first-of-its-kind renewable energy system in Hengbung, India, creates hydropower with solar pumps to prevent the community from experiencing prolonged power outages during extreme weather. At the same time, the project is increasing India’s renewable energy capacity.

In Gateshead, England, Lanchester Wines keeps its storage warehouse at a stable temperature year-round using geothermal heat from an abandoned coal mine nearby. The water that naturally floods the mine is geothermally heated below ground, then a heat pump system pulls that water to the surface to transfer that heat to the warehouse.

Solar energy is a clean, cheap, renewable, and land-efficient resource, making it a valuable technology to scale up in the face of climate concerns and clean energy. Diversifying the supply chain for creating and sourcing solar panels can help make solar energy more reliable when faced with geopolitical and human rights issues.