Many of Stem’s energy storage systems are contracted to respond to utility needs. Our extensive portfolio includes more than 300 systems across Southern California that provide controllable demand response (DR) capacity to the utility; a Virtual Power Plant (VPP) that helped a Hawaiian utility successfully integrate large amounts of customer-sited solar; and a Non-Wires Alternative (NWA) project with a Midwestern utility, where energy storage is helping to delay or avoid a costlier substation upgrade.
Stem’s energy storage solutions are tailored to address a variety of co-op requirements – whether the goal is to integrate renewable energy, reduce capacity and transmission charges, defer grid upgrades, provide resilience to members, or earn revenues through wholesale market participation. Stem’s expert team consults with utilities and developers to analyze all possible use cases and determine the best hardware and services solution that optimizes savings, reduces costs, and mitigates risk.
Stem supports communications protocols like DNP3, allowing for seamless integrations with utility dispatch platforms. We have responded to more than 83,000 grid services site dispatches, with response times as fast as 5 minutes. And stem’s proprietary utility user platform enables utility operators to schedule dispatches with a simple user interface and provides real-time operating visibility into system status and available capacity.
Stem has the largest and most advanced suite of storage products on the market, with hardware combinations including AC- and DC-coupled solutions by Tesla, Sungrow, Powin, and others. Leveraging years of procurement expertise, Stem competitively sources hardware with the flexibility to find the right combination of equipment and warranties for your project.
Stem’s Athena software maximizes energy storage and solar plus storage performance via industry-leading forecasting, optimization, and controls. Athena is the world’s most utilized, validated, and successful optimization software for distributed energy resources (DERs) like energy storage and solar PV.
Featured Project: Today’s Power, Inc.
This project integrates a 14MWh front of meter energy storage system with 2.7MW of solar PV to reduce wholesale demand charges for Ozarks Electric Cooperative (OEC) and provide renewable energy to multiple off-taker members. Stem’s Athena AI enables OEC to schedule battery dispatch in real time or ahead of time and monitor battery status and historical performance data.Read More
Energy Storage System Size:
7MW / 14MWh