Six companies are named as trading 13 of Finland’s 93 named batteries, and Capalo AI trades the most of those running

A trader, often called an optimiser, is the company that bids a battery into Fingrid’s reserve markets and the power exchange on its owner’s behalf. Some owners trade their own, and some sell the capacity to a trader for a fixed fee, a toll. Fingrid publishes the markets and not the bidders, and no Finnish register names them, so these are the agreements the owners and traders have announced. 6 of the 25 batteries running or commissioning have a named trader; for the rest, none has been announced.