Grid-scale battery storage (lithium-ion, iron-air, flow batteries)

The world needs to replace fossil fuels with clean energy sources fast — but we're not moving nearly quickly enough. Even as solar and wind costs have plummeted, we're still adding more fossil fuel capacity than clean energy in many regions. The challenge isn't just building more renewable power plants. It's also storing that energy when the sun isn't shining, upgrading ancient electrical grids, speeding up painfully slow permitting processes, and dealing with the reality that we've already built trillions of dollars worth of coal and gas infrastructure that someone paid for and expects to keep running.

Meanwhile, nearly a billion people still lack electricity entirely, and even in wealthy countries, our energy systems are rigid and wasteful. We need technology solutions that make clean energy cheaper, faster to deploy, and more reliable than fossil fuels — not just sometimes, but always.

Solar panels don't work at night, and wind doesn't blow on schedule. But people need electricity 24/7, and demand peaks in the evening when solar output is dropping. Without storage, this mismatch forces utilities to keep fossil fuel plants running as backup, undermining the climate benefits of renewables.

Solving this requires technologies that can store massive amounts of energy for hours, days, or even seasons — and release it exactly when needed.

Massive battery installations that store electricity when renewable generation is high and release it when demand peaks or renewable output drops. Lithium-ion dominates today but faces cost and material constraints. Iron-air and flow batteries offer cheaper alternatives for longer-duration storage, using abundant materials and lasting for decades of daily cycling.