More sellable energy out of the BESS already in operation

Grid scale storage operators run a battery energy storage system (BESS) that is often owned or financed by an investor. The day to day trading goes to an optimiser. BMB works alongside all parties in the chain, including the energy management system (EMS), as the neutral data layer inside the system they already run. Revenue swung between £41,000 and £70,000 per MW in a single quarter, so beating the market average is the whole job.

That means keeping the battery ready to deliver what it is paid for, measured at the grid connection point. It also means losing capacity no faster than the supplier guaranteed.

Why the health figure belongs to the supplier today

The only health number for a 5 MWh asset comes from the supplier’s own battery management system. Yet the supplier is the party that pays if the guarantee is broken. To check real capacity, the battery is taken off the market for a test once a year. The other 364 days, the asset manager tracks charge cycles, charge limits and warranty terms across spreadsheets and supplier portals.

The trader and the asset manager sit in different systems. The trader does not see what a cycle costs in battery life. The asset manager does not see what it earned. Nobody puts the two side by side.

BMB reads capacity from how the battery actually behaves, instead of from the supplier’s BMS. Where the BMS data is too coarse, a BMB edge unit next to the battery reads the cells second by second. It finds the last of the unused capacity.

BMB gives storage operators more usable capacity. They also get a battery health figure that is their own, not the supplier’s, read per rack every day without taking the battery offline.

Up to 10% of the energy sits unused behind cells out of balance and cautious cut offs. Recovering it is revenue on hardware already bought. And when capacity drops faster than promised, an independent number makes the warranty claim stick.