Scientists at UC Santa Barbara have engineered a molecule that captures sunlight, stores the energy in chemical bonds, and releases it as heat on demand. The compound, a modified pyrimidone, behaves like a compressed spring: sunlight pushes it into a high‑energy state that can be snapped back with a small trigger in seconds later on.

Researchers drew inspiration from DNA, where a similar pyrimidine core flips shape under UV light. Computational modeling with UCLA’s Ken Houk confirmed the molecule’s stability, showing it can retain excess energy for years without loss. The team highlighted a 1.6 MJ/kg energy density—nearly double that of a typical lithium‑ion battery in kilograms per year usage today world.

To prove practicality, the researchers demonstrated the material could boil water under ambient conditions, a benchmark hard to achieve in MOST technology. This heat output could power off‑grid heating or water‑boiling systems without extra batteries. Because the compound dissolves in water, future designs might circulate it through rooftop collectors during daylight in California today again.

Support came from the Moore Inventor Fellowship, awarded to lead scientist Grace Han in 2025, underscoring the project’s promise. If scalable, this liquid battery could replace bulky grid‑linked storage, enabling clean energy to be stored chemically and released on demand. The technology offers a tangible step toward truly autonomous solar power for the world today again.