Portable, Robust, Microgrid Integrated Storage System

PROMIS® is a portable energy storage system primarily designed for emergency energy supply to single and three-phase customers. PROMIS® is designed for frequent relocation and fast interconnection at a new site using a standard generator terminal box with Cam-lok™ plugs. PROMIS® offers a clean replacement for emergency (portable) diesel generators and can operate in grid-connected mode for grid support functions.

PROMIS® platform is equipped with integrated microgrid technology and an onboard controller that provides comprehensive sets of autonomous controls, optimization schemes, and supervisory capability for ease of remote operator access and integration back to the Dispatch Center for overall grid coordination.

Features and Benefits

Improved Safety and Environmentally Friendly

  • Reliable, fire-resistant, and safe battery-cell technology.
  • Non-walkable and modular design compliant with UL 9540.
  • Explosion and fire-resistant battery cabinets (NEMA rated).
  • Additional fire suppression systems designed to meet the NFPA 855 fire-protection standard.
  • Sound-attenuated containerized enclosure.
  • Vibration, tension, and impact detection sensors.

Mature Technology

  • UL-certified Battery Management System (BMS).
  • Lithium iron-phosphate (LiFePO4) battery cells.
  • High full-cycle charge rate (>6,000 cycles).


  • Containerized solution with no transportation permit required per most Departments of Transportation (DOT).
  • Installed on a flatbed or step-deck trailer for easy transport.
  • Anti-vibration and shock-absorbent design.

Plug-and-Play Interconnection

  • Compliant with IEEE 1547-2018 interconnection requirements using standard switches.
  • Includes a visible load-break disconnect switch, fault-interruption circuit breaker, and synchronizing devices.
  • Contains an isolation transformer for interconnection with fuse and circuit breaker overcurrent protection.