100 kW
200 kWh
Lithium-ion batteries
1.3 MW
Batteries storage




Stem, is the leader in US intelligent energy storage

Thanks to their best-in-class software combined with energy storage, they help customers reduce energy costs. With over 45 years’ experience in UPS, integrated power specialist, Socomec, has developed a range of modular and flexible systems that convert and store energy in order to manage fluctuations in demand : the SUNSYS PCS².

Project challenges
Develop a UL certified solution

Develop a UL certified combined modular solution for energy storage.

Interface with Stem software

Interface our products with the Stem software.

Socomec contribution on Stem project

Socomec, as a Stem partner, provided, integrated and designed energy storage solutions:

  • Integrated systems of 100 kW / 200 kWh with Sunsys PCS² and Lithium ion batteries.
  • Battery protection cabinets.


The SUNSYS PCS² is integrated with Stem’s edge computing equipment and controlled by Stem’s learning software, which uses big data and predictive analytics to feed stored energy back into the building during periods of peak demand. By optimizing when electricity is drawn from the grid, the owners and operators of commercial buildings will benefit from the automated reduction of electricity bills.

1.3 MW indoor energy storage system


1.3 MW indoor energy storage system using Socomec solution, installed by Stem, global leader for intelligent energy storage and predictive energy software.

“Stem is pleased to work with Socomec as one of our technology suppliers. We have integrated their battery and converter with our best-in-class software and found the product to be responsive and able to deliver meaningful results to customers and the grid.”

Daniel Elizalde Director of Product Management at Stem

Our energy storage references

Nice Grid
Storage for integrating renewable energy and islanding, a proven reality
A smart network for the local community
Solenbat optimises the active energy efficiency of buildings
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