HELIOS ESS &
Sol-Ark Hybrid
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 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.
Whether you’re preparing for outages, reducing dependence on the grid, or seeking long-term cost savings, HELIOS + Sol-Ark offers a turnkey path to energy independence.
System Configurations
| Feature | 12K-2P Essentials | 15K-2P Whole-Home | 18K-2P Premium |
|---|---|---|---|
| AC Power (Continuous) | 9 kW AC backup output | 15 kW AC grid output | 18 kW AC continuous output |
| Surge / Peak Power | Designed for essentials, modest surge support | Higher surge to handle inductive loads and appliances | 36 kVA surge (≈10 s) for motors/HVAC/heavy loads |
| Best Fit Use Cases | Partial backup: essentials (lights, fridge, small appliances) | Whole-home backup; electrical appliances, EV charging | Demanding applications: HVAC, pumps, EV, high PV generation, off-grid |
| Backup Transfer Time | ~5 ms | ~5 ms | ~5 ms |
| Grid Pass-Through | 50 A grid pass-through; designed for “essentials” backup | 200 A grid pass-through; supports larger homes | 200 A grid pass-through; built for whole-home and heavy loads |
| Battery Charging Capability | 185 A battery charge/discharge | 275 A charge/discharge | 350 A charge/discharge |
| Solar Input Capacity | Up to 12 kW PV (AC/DC coupled) | Up to 19.5 kW PV | Up to 32.4 kW PV |
| MPPT Trackers | 2 MPPTs | 3 MPPTs | 3 MPPTs (higher current handling) |
| Enclosure / Conditions | IP65 outdoor-rated; −25°C to +55°C | IP65 outdoor-rated; −25°C to +55°C | IP65 outdoor-rated; −25°C to +55°C |
| Efficiency | ~97.5% max; ~96.5% CEC | ~97.5% max; ~96.5% CEC | ~97.5% max; ~96.5% CEC |
| Recommended HELIOS |
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| Why this counts | Inverter battery charger is 185 A, one HELIOS delivers 200 A so you meet full charge/discharge capability. | Inverter battery charger is 275 A, two HELIOS provide 400 A combined for full performance and surge headroom. | Inverter battery charger is 350 A, two HELIOS provide 400 A combined for full performance; three recommended for heavy off-grid or large motor starts. |
| Usable energy at recommended configuration | 16 kWh | 32 kWh | 32 to 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 designed for a clean, code-compliant install with Sol-Ark inverters. Installers can choose the wiring pathway that best suits the project:
• Sol-Ark Conduit Box. Purpose-built for Sol-Ark 15K, with knockouts and quick-connect points that align directly with the inverter for the fastest, neatest integration.
• Discover Generic Wireway. A flexible option from Discover that allows installers to run battery cables and communication lines cleanly between HELIOS batteries and Sol-Ark other inverters or equipment while maintaining service access and code compliance.
• Custom / Installer-Supplied Wireway. For projects with unique layouts, installers can supply their own wireway mounted over the battery to route and protect cabling, ensuring a tidy finish that matches 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 pairing of Discover HELIOS batteries with Sol-Ark hybrid inverters delivers unmatched performance for homeowners seeking whole-home backup and long-term energy independence. Where other solutions may compromise on value, scalability, or support, Discover + Sol-Ark stands apart.
HELIOS batteries provide 16.1 kWh of safe, UL-certified lithium storage, expandable as your needs grow, while Sol-Ark inverters deliver industry-leading AC output and intuitive TOU savings. Together they create a turnkey, installer-friendly system that is cost-effective, resilient, and scalable. Discover HELIOS batteries with Sol-Ark hybrid inverters are the smart choice for homeowners who want proven technology, trusted brands, and peace of mind for years to come.
True Whole-Home Backup
<5ms transfer speed ensures uninterrupted power.
Proven Reliability
UL-certified battery, UPS-grade inverter, certified Sol-Ark partner
Scalable Storage
16.1 kWh usable per battery, expandable up to 580kWh.
Fast, Clean Install
Dedicated conduit box, quick connect terminals, integrated LYNK II mount.
Energy Savings
Time-of-Use (TOU) shifting, generator support, EV readiness
Want to Learn More?
Contact us to get started designing your project with Discover + Sol-Ark.
