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Discover Energy Systems > Helios ESS | 48 Volt 16kWh Home Battery - Lithium Iron Phosphate (LiFeP04)
Battery Storage for Home or Business.
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Model
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Helios ESS
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Series
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Helios ESS
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Manufacturer
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Discover Energy Systems
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Energy Storage for Residential and Light Commercial Applications
HELIOS ESS is a high-performance lithium battery system engineered for integration with
modern hybrid and battery inverters in residential and light-commercial energy storage
applications. It provides versatile DC-coupled storage that supports grid-interactive, selfconsumption,
backup power, and off-grid operation.
Built on Discover’s 75-year legacy as a Canadian leader in energy storage innovation,
HELIOS delivers 16 kWh of usable capacity in a compact, outdoor-rated enclosure with
advanced 4th-generation BMS control, intelligent communication, and scalable architecture.
Certified to UL 9540, UL 9540A , and UL 1973 standards, HELIOS ESS ensures safe, reliable
performance and simplified installation, providing a proven and future-ready solution for
dependable energy independence.
Specifications
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Mechanical Specifications
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Height
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35.3"
900 mm
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Width
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9.7"
247 mm
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Depth - body only
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10.7"
271 mm
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Depth (including Wall-Mount bracket)
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B
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Terminal
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Quick Connect Plug and Pull Terminal
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Weight
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299 lb
136 kg
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IP Rating
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IP65
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Case Material
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Galvanized Steel Sheet
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Mechanical Specifications
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Nominal Voltage
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51.2 V
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Nominal Capacity
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31.4 Ah
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Usable Energy
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16,080 Wh
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Depth of Discharge
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100% *
*Leaving the battery at 0% SOC will lead to irreversible damage and void the warranty.
Immediately recharge the battery after discharging to 0%.
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Charge Bulk Voltage - Bulk Vdc
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55.2 – 56.8 V
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Charge Absorption Voltage - U1 MAX
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55.2 – 56.8 V
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Charge Float Voltage - U2
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53.6 V
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Charge Termination Current
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5 A
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Recommended High Voltage Disconnect
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56.9 V
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Overvoltage Disconnect (BMS)
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58.0 V
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Recommended Low Voltage Disconnect
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48 V
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Undervoltage Disconnect (BMS)
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43.2 V
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Max Continuous Charge Current
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200 A
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Max Continuous Discharge Current
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200 A
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Max Continuous Discharge Rate
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10.24 kW
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Peak Discharge Current (15 seconds)
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300 A RMS
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Self Discharge Current (operation)
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≤ 25 mA
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Self Discharge Current (battery OFF)
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≤ 4 mA
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Breaker
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200 A breaker
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Maximum short circuit fault current
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7.16 kA (100 ms) / 3.58 kA (100 ms)
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Arc Flash Incident Energy IEm
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0.310 Cal/cm2
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Arc Flash Incident Energy AFB
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239 mm (9.41 in)
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REGULATORY
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Certifications
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UN38.3, UL 1973, UL 9540A,
UL 9540 DC ESS 3rd Edition
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Features
HIGH PERFORMANCE
- 10 kW continuous, 19 kW peak power (10 sec)
- Advanced 4th-generation BMS for precise control and efficiency.
- 93 MWh lifetime throughput with a 10-year warranty.
ALL-CLIMATE DESIGN
- 10 kW continuous, 19 kW peak power (10 sec)
- Outdoor-rated IP65 enclosure.
- Reliable operation from −25 °C (−13 °F) to 55 °C (131 °F).
- Self-heating from −25 °C (−13 °F) to 8 °C (46 °F).
ADVANCED SAFETY
- Safe LiFePO₄ chemistry with dual fire arrestors and DC
breaker.
- Rapid Shutdown (RSD) input and emergency stop for NEC
690.12 compliance.
- Certified to UL 9540, UL 9540A , and UL 1973.
SMART INTEGRATION
- Closed-loop CAN communication with hybrid and
battery inverters.
- Ready for grid-tied, hybrid, or off-grid configurations.
- Simplified installation and commissioning.
SCALABLE & INSTALLER FRIENDLY
- Expandable up to 36 modules (≈ 580 kWh).
- Pre-wired parallel and inverter kits for quick setup.
- Quick-connect terminals for easy installation.
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