Closed-Loop Inverter Partners
HELIOS ESS
A robust and scalable battery system designed for solar installers, EPCs, and integrators, HELIOS ESS delivers energy storage for off-grid, backup, rural electrification, and light-commercial applications.
Spec Highlights
200 A Charge / Discharge Capability
16 kWh, 51.2 V, 314 Ah Capacity
Internal 400 A Busbar for Parallel Connections
Outdoor, IP-65/NEMA 3R Rated
Deliver the Best Cost per kWh for Your Clients
High Energy Density – 16 kWh of energy storage per battery saves you money.
Scalable Architecture – Expandable to 580 kWh to meet growing residential or light-commercial demands.
Reliable Performance - 10-year workmanship warranty and a 93 MWh energy throughput performance guarantee.
Great Price. Impressive Features and Top Performance.
HELIOS ESS is a high-performance lithium battery with an intelligent BMS, integrated safety features, and seamless inverter communication — all packaged in an outdoor-rated, scalable, wall-mounted solution designed for backup, off-grid, and distributed energy projects.
Hassle-free permitting with with UL 9540*, UL 9540A, and UL 1973 certifications. *UL 9540 DC ESS 3rd Ed. Pending
Safe by design, safe LFP cells, internal dual-stage fire arrestors, RSD input, high current BMS, DC breaker, layered electrical protection — all tested to UL standard
Fourth Generation BMS with high current Dynamic Charging and Dynamic Top-balancing.
Seamless inverter integration with a wide range of direct-to-inverter CANbus communication protocols for popular inverter brands.
Easy unboxing and handling with detachable unboxing rope handles. Optional heavy-duty lifting and positioning handles are available.
Flexible mounting options with adjustable feet and an integrated wall mounting bracket, indoors or outdoors.
Install multi-battery systems quickly with a pre-wired battery-to-battery parallel connection kit and an inverter cable kit — no cutting or crimping required.
Customize battery layouts with optional quick-connect terminals that let you crimp custom-length cables.
Easy Installation, Indoors or Outdoors
HELIOS ESS 16 kWh Battery.
Designed for a clean-look installation with Sol-Ark 15K inverters. Secure cable management and enhanced safety.
Pre-sized battery-to-battery and inverter cables, connector kits.
Heavy-duty lift handles for safe positioning.
Enhance HELIOS with relay controls and remote access.
Remotely access HELIOS with LYNK CLOUD.
Hear What Professional Installers Have to Say About the HELIOS ESS
Preview of the Helios Battery by Discover! - Engineer775
Helios Battery Review: Off Grid Power for Every Climate - Engineer 775
Documents
For further information or partnership opportunities, please contact us.
How do I work with Discover Energy Systems?
Discover sells through solar industry distributors and installers. We do not sell directly to homeowners.
If you’re a solar industry professional, tell us about yourself, and a member of our sales team will reach out to you shortly.
