February 2026

Batteries are scaling fast and excel at short duration work, but typical 4 hour systems aren’t built for multi-day grid stress. As loads rise and retirements continue, long-duration reliability matters more, and pumped storage isn’t “old tech” so much as infrastructure: long life, gravity and water storage that can deliver duration plus grid services at scale. The real question isn’t batteries or pumped storage, it’s where batteries stop being enough.

A nuclear plant is one of the cleanest ways to make huge amounts of electricity, 24/7. It’s also one of the hardest things humans build on purpose. It means: nuclear is a megaproject that punishes mistakes.