State of charge (SOC) is on the face of it a straightforward measurement for batteries and BESS. But in reality, it’s highly complex and under- or over-reporting still happens in the industry, leading to under-performance and losses in revenue.

Energy-Storage.news speaks to Dr. Kai-Philipp Kairies, CEO and co-founder of ACCURE Battery Intelligence, ahead of the upcoming Energy Storage Summit USA 2026.

Last summer, a Texas energy storage operator watched in frustration as their battery system missed a golden trading opportunity during a peak demand window.