What Is a BESS?
A Battery Energy Storage System (BESS) converts electrical energy into chemical energy for storage and converts it back to electrical energy when needed. Unlike a generator, a BESS requires no fuel — it stores energy that has already been generated (from the grid, from solar panels, or from other sources) and releases it on demand. BESS is a key enabling technology for the transition to high-renewable power grids and for reducing energy costs in commercial and industrial facilities.