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.
GREAT PRICE, IMPRESSIVE FEATURES, 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.
Hassle-Free Permitting
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. Closed-loop communication with EG4, Schneider, Sol-Ark, Victron, and Growatt inverters.
Remote Monitoring
Access live performance data and manage your HELIOS system from anywhere through the Lynk Cloud platform (LYNK required).
Integrated Self Heating
Built-in self-heating system operates automatically from -25°C (-13°F) to 8°C (46.4°F), ensuring reliable performance and faster warm-up in cold environments.
Install Multi-Battery Systems Quickly
With a pre-wired battery-to-battery parallel connection kit and inverter cable kit - no cutting or crimping required.
Customize Battery Layouts
With optional quick connect terminals that let you crimp custom length cables.
HELIOS / SOL-ARK BUNDLES
Take control of your home’s energy with the proven combination of Discover Battery's HELIOS ESS and Sol-Ark Hybrid Inverters (12K | 15K | 18K). This pairing is built for performance, resilience, and scalability, delivering whole-home backup with seamless switch-over, advanced monitoring, and simplified installation. Scalable from 16 kWh to 48 kWh using 1-3 HELIOS units.
12K-2P Essentials
Essential Backup Power
- 9 kW AC backup output
- Designed for essentials, modest surge support
- Partial backup: essentials (lights, fridge, small appliances)
- ~5 ms backup transfer time
- 50 A grid pass-through; designed for "essentials" backup
- 185 A battery charge/discharge
- Up to 12 kW PV (AC/DC coupled)
- 2 MPPTs
- IP65 outdoor rated −25°C to +55°C
- 16 kWh usable energy
15K-2P Whole-Home
Expanded Backup Capacity
- 15 kW AC grid output
- Higher surge to handle inductive loads and appliances
- Whole-home backup; electrical appliances, EV charging
- ~5 ms backup transfer time
- 200 A grid pass-through; supports larger homes
- 275 A charge/discharge
- Up to 19.5 kW PV
- 3 MPPTs
- IP65 outdoor rated −25°C to +55°C
- 32 kWh usable energy
18K-2P Premium
Maximum Backup Capacity
- 18 kW AC continuous output
- 36 kVA surge (~10 s) for motors/HVAC/heavy loads
- Demanding applications: HVAC, pumps, EV, high PV generation, off-grid
- ~5 ms backup transfer time
- 200 A grid pass-through; built for whole-home and heavy loads
- 350 A charge/discharge
- Up to 32.4 kW PV
- 3 MPPTs (higher current handling)
- IP65 outdoor-rated; −25°C to +55°C
- 32 to 48 kWh usable energy
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.
Easy Installation, Indoors or Outdoors
LYNK II Gateway
Enhance HELIOS with relay controls and remote access.
LYNK II Communication Gateway aggregates and displays in real-time the State of Charge for HELIOS ESS. Unlock the full potential of HELIOS batteries by enabling them to optimize the charging configurations of hybrid inverter-chargers and solar charge controllers.
Turn a good solar system into a great one with up to 25% improvement in 0% to 100% SoC recharge time. Remotely monitor SoC and data log multiple sites using the data monitoring services offered by inverter systems.
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Need Help?
Have questions about our products? Contact us today and one of our amazing team members will get back to you.
