Native outdoor Energy Storage System
From 100 kVA / 186 kWh to several MVA / MWh systems

SUNSYS HES L is a native outdoor system that merges proven technologies to create an all-in-one solution that is greater than the sum of its parts. Partnering with CATL, Socomec has selected the EnerOne liquid cooled LFP battery system as the optimum battery for SUNSYS Hybrid Energy Storage. When it comes to safety, this system sets a new standard.


The solution for

• Commercial and Industrial Buildings
• EV charging infrastructure
• Isolated microgrids
• Resilient microgrids
• Renewable energy integration



High safety

• Socomec PCS uses safe conversion technology to limit the common mode noise effect.
• CATL Battery utilises the stable LFP chemistry that can withstand thermal runaway.
• SUNSYS HES L is compliant with UL9540-2020.

Extreme flexibility

• 3 standards cabinets (C-Cab, B-Cab and DC-Cab) and 1 engineered to order AC-Cab that can be adapted.
• The installation can be upgraded with increased power and/or increased energy.

Fast and error-free installation

• B-Cabs are shipped fully assembled.
• The intelligence (PMS & BMS) is integrated inside the C-Cab.
• Drilling plates and DC connecting kits are provided to simplify the installations.

Easy maintenance

• Reduced maintenance with HVAC replaced by air filters.
• Hot-swappable power modules in the C-Cab.
• B-Cab individually disconnected for module replacement.


  • Standard and option features

  • Technical Data


    System information
    Power modularity 50 kVA power modules - up to 300 kVA per cabinet
    Symmetrical overload 110% during 30 min - 125% during 10 min - 150% during 30 s
    Chemistry LFP - Lithium Iron Phosphate
    Energy Nameplate 186 kWh per cabinet
    AC/AC Max Round Trip Efficiency 90%
    Maximum C-rate 0.5 C
    Maximum current 83 A charging / 87 A discharging per 50 kVA power module
    AC connections 3*240 mm² (consult us for higher section)
    Rated voltage (Un) 400 Vac (3ph+N) -20%/+10%
    Rated frequency 50 Hz ±6%
    Fire protection Fire Safety System including smoke detectors, heat detectors and aerosol
    Environment installation Native outdoor
    Degree of protection IP 55
    Operation temperature -20 to +45 C° without derating
    Storage temperature -20 to +60 C°
    Relative humidity 4 to 95% w/o condensation (internal cabinet heating)
    Acoustic level at 1 m < 70 dB
    Maximum altitude 1000 m without derating (consult us for requirements above this)


    Installation configurations




    System configurations

    Many system configurations are available to meet customer requirements



  • Monitoring and control