HELIOS ESS &
Solis Inverters
Integration
The Smart, Scalable Backup Solution.
HELIOS ESS &
Take control of your home’s energy with the proven combination of Discover Energy Systems’ HELIOS ESS and Solis LV S6 Inverter.
This pairing deliver a seamless, all-in-one solution for backup power, off-grid living, and solar self-consumption. Together, they combine high performance, durability, and smart energy management for peace of mind at home.
Purpose-built for residential energy storage, this pairing reduces install time, streamlines commissioning, and ensures long-term customer satisfaction.
System Configurations
| Feature | Solis 9.6K | Solis 11.4K | Solis 12K | Solis 14K | Solis 16K |
|---|---|---|---|---|---|
| AC power (continuous) | 9.6 kW | 11.4 kW | 12 kW | 14 kW | 16 kW |
| Surge / Peak Power | 3×rated power (≈1s) | 3×rated power (≈1s) | 3×rated power (≈1s) | 3×rated power (≈1s) | 3×rated power (≈1s) |
| Best Fit Use Cases | Essentials backup (lights, fridge, small appliances) | Whole-home backup for medium loads and appliances | Whole-home backup; larger appliances and EV charging | Demanding homes: HVAC, pumps, EV, higher PV input | Heavy loads, large homes, off-grid or VPP-ready |
| Backup Transfer Time | < 4 ms | < 4 ms | < 4 ms | < 4 ms | < 4 ms |
| Rated Output Current | 40 A | 47.5 A | 50 A | 58.3 A | 66.7 A |
| Max battery Charge/Discharge current |
200 A | 237.5 A | 250 A | 290 A | 290 A |
| Solar Input Capacity | Up to 12 kW PV | Up to 16 kW PV | Up to 19.5 kW PV | Up to 25 kW PV | Up to 32 kW PV |
| MPPTs / strings per MPPT | 3 / 2 string per MPPT | 3 / 2 string per MPPT | 3 / 2 string per MPPT | 3 / 2 string per MPPT | 3 / 2 string per MPPT |
| Enclosure / Operating Temp | Type 4X / -25°C to 60°C | Type 4X / -25°C to 60°C | Type 4X / -25°C to 60°C | Type 4X / -25°C to 60°C | Type 4X / -25°C to 60°C |
| Efficiency | ~96% CEC | ~96% CEC | ~96% CEC | ~96% CEC | ~96% CEC |
| Recommended HELIOS |
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| Why this counts | Inverter battery charger is 200 A. One HELIOS delivers 200 A, so a single unit meets full charge/discharge capability. | Inverter battery charger is 237.5 A. Two HELIOS provide 400 A combined, ensuring full performance with additional surge headroom. | Inverter battery charger is 250 A. Two HELIOS provide 400 A combined, covering full performance and surge demands. | Inverter battery charger is 290 A. Two HELIOS provide 400 A combined, sufficient for performance, with three recommended for heavy off-grid use or large motor starts. | Inverter battery charger is 290 A. Two HELIOS provide 400 A combined for full performance, with three recommended for surge margin, high PV input, or off-grid applications. |
| Usable energy at recommended configuration | 16 kWh | 32 kWh | 32 kWh | 32 kWh | 48 kWh |
| Per-battery Capability | 16 kWh, 51.2 V, 314 Ah, 200 A charge and discharge, IP65 outdoor rated. | ||||
Simple & Flexible Installation Options
HELIOS ESS is built to simplify wiring with Solis inverters while maintaining safety and compliance. Installers can choose the method that best fits the jobsite:
• Discover Generic Wireway. Provides a dedicated pathway to route both power and communication cables, keeping installations neat and accessible.
• Custom / Installer-Supplied Wireway. For projects with unique layouts, contractors can design their own protective channeling to match site conditions.
950-0068 PARALLEL BATTERY TO BATTERY CABLE SET
950-0070 BATTERY TO INVERTER CABLE SET
950-0072 BATTERY CONNECTOR SET
WHY CHOOSE THIS SOLUTION
The HELIOS + Solis integrated package brings together speed, simplicity, and reliability in one complete package. Native CAN communication between the inverter and battery allows seamless commissioning. HELIOS can expand from a single unit to large multi-battery systems, supported by flexible wireway solutions and parallel cable kits that adapt to different layouts. With outdoor-rated, self-heating, and UL-certified construction, HELIOS ensures safety and reliability in all conditions. Combined with responsive support and advanced remote monitoring from both Discover and Solis, this solution reduces complexity during setup and delivers long-term confidence once it’s running.
Seamless Backup Power
.Sub-4 ms switchover time keeps critical loads powered without interruption
Certified Performance.
HELIOS batteries are UL9540 certified and Solis S6 inverters carry UL1741/SB certification for grid compliance
Expandable Capacity
Each HELIOS delivers 16.1 kWh; scale easily from a single unit to over 579 kWh.
Installer Ready
Each HELIOS delivers 16.1 kWh; scale easily from a single unit to over 579 kWh
Smart Energy Management
Supports TOU shifting, integrates with generators and EV chargers, and is compatible with virtual power plant programs.
Want to Learn More?
Contact us to get started designing your project with Discover + Solis.
