SUNSYS HES L is an outdoor energy storage system adapted to on-grid energy storage, in terms of both generation and distribution side. It supports dedicated applications such as the optimisation of photovoltaics and self-consumption, peak shaving and backup power for commercial and industrial buildings and EV charging infrastructures, for example. 
The solution is also ideal for off-grid installations where it can provide an energy reserve in the event of an electrical blackout and can energise non-electrified areas in place of generators. Furthermore, in dual on-grid mode with "island" mode, the resilience of the connected smart grid increases.

Conformity to standards

Safety: IEC 62368-1, IEC 62933-5-2, UL 9540A
EMC: EN 61000-6-2/4
Mechanical: EN 60529, EN 62262
Environment: RoHS, REACH, IEC 61249-2-21, WEEE 2012/19/UE
Comm. Protocol: Modbus TCP
Grid code: Germany, France, Italy, United-Kingdom, Belgium, Netherlands, Sweden, Denmark, Switzerland, Spain and European Grid Code Non-exhaustive list
Please consult us for full detailed list of countries and grid codes.


High safety standards

SUNSYS HES L system has been designed using the best conversion and battery technologies, primarily to achieve a high level of security. The B-Cab (battery storage cabinet) comprises stable lithium iron phosphate (LFP) chemistry; moreover, punctual thermal management guarantees safety thanks to liquid cooling and a fire protection system.
The complete system is safety certified according to the strictest European and American standards.

Extreme scalability

Based on 4 cabinets, SUNSYS HES L is a modular energy storage system with convenient sizing; its flexibility means that it adapts to the specific needs of your system. In fact, our AC-Cab (power distribution cabinet) is designed on a case by case basis in full compliance with your own installation and requirements. Based on standard equipment and pre-tested configurations, the design, quotation, installation and commissioning process is much faster as a result.

Fast and safe installation

SUNSYS HES L is supplied with all internal energy modules pre-assembled and plug and play power modules to guarantee maximum quality, the optimisation of installation time and ease of transport.
Furthermore, the supply kit always includes the DC, communication and auxiliary power supply cables kit, headed and made to measure for connecting the B-Cab storage units with the C-Cab conversion and control units.

Combines the best technologies

Thanks to a co-design between CATL and Socomec, you can be assured of compatibility between products, and that the complete system has been validated and certified.
The C-Cab (power conversion cabinet) has been designed to include everything required for battery operation, including the management system as well as the power supply.


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

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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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