Case Study: Fortune 100 Retailer achieves 6x average monthly savings with Stem’s Athena®

Fortune 100 Retailer gains 6x average monthly savings with Stem’s Athena

Fortune 100 Retailer was experiencing negative monthly savings across a 10‑site Southern California energy storage portfolio due to poor software performance from a prior provider, lack of utility integration, and slow time to value. The retailer engaged Stem and deployed Stem’s Athena platform to manage its energy storage, utility bill optimization (UBO) and demand response (DR) capabilities for the 18 MWh portfolio.

Stem took seamless operational control of the sites, unified them into a single view, improved short‑term forecast accuracy, and resolved metering issues through expert QA. As a result, Stem’s Athena increased average monthly savings by more than 600% (6x), turned all 10 sites profitable, and delivered measurable improvements from day one of the billing cycle.