SUNSYS HES XXL is a complete and ready to use high power energy storage system for on-grid and off-grid applications.
This system is based on standard cabinets: a converter cabinet C-Cab XXL and a battery cabinet B-Cab XXL (CATL) enabling a large variety of configurations in a simple and safe way.
It is perfectly adapted to large scale commercial and industrial installations as well as standalone or colocated - mainly with renewables - projects.

Conformity to standards

- Safety: IEC 62909-1, IEC 62477-1; UL 9540A
- EMC: EN 61000-6-2/4
- Mechanical: EN 60529; EN 62262
Environment: RoHS; REACH; IEC 61249-2-21; WEEE 2012/19/UE
- Communication protocol: Modbus TCP
- Grid code: Europe: EN 50549
Please consult us for additional ones


High safety

- Battery cabinet B-Cab XXL: based on Lithium Iron Phosphate (LFP) chemistry.
- UL 9540A certification insuring that the fire safety system will withstand thermal runaway.

Extreme scalability

- System configuration based on two standard cabinets offering wide range of configurations:
* a C-Cab converter cabinet 1.5MVA
* a B-Cab battery cabinet 372 kWh in 0.5C or 379 kWh in 1C
- Possible system paralleling to reach 6MVA/20MWh on a single transformer.

Optimised asset management & performance

- Presales support.
- Remote monitoring to enhance energy management.
- Adaptable warranties, maintenance contracts and trainings to ensure optimum operations.

Integrated ready to use certified system

- Certified and tested systems including; converter, batteries and the control cabinets all together.
- Specifically developed software adapted to enable internal communication between all cabinets.


  • Energy - Energy storage for grid services
  • Energy - Switching for PV installations
  • Infrastructure & Transport - Power for EV charging
  • Building - Energy storage behind the meter

Associated services

Extended warranty

for energy storage system SUNSYS HES

Preventive maintenance

for energy storage system SUNSYS HES

SoLive PRO

Real-time system data processing

Cybersecurity and Data Protection
The safety of your data is at the core of everything we do. Discover how we provide you with secure and trusted connections through our cybersecurity policy.



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