For 2026 residential energy resilience, the SolaX X1-EPS BOX (EPSBOX1) is the most important automatic transfer switch. The SolaX hybrid inverters have an internal Emergency Power Supply (EPS) mode, but the EPS Box is the special hardware that keeps your important loads running safely when the power grid goes down by providing physical isolation and “power steering.”
Seamless Energy Continuity: The 0.5s Switch
If there is a blackout, the SolaX X1-EPS Box uses a built-in dual-contactor system to disconnect your home from the grid. This happens in less than half a second, which means the switch to battery and solar power is almost instant. This super-fast switching keeps sensitive home electronics safe from the hard resets that usually happen with manual changeover switches. These include routers, security systems, and medical equipment.
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Intelligent Power Steering: The box acts as a smart gateway, directing stored energy from your Triple Power or Pylontech batteries specifically to your “priority” circuits (fridge, lighting, and communications) while keeping the rest of the house isolated to prevent battery drain.
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Full iSolarCloud Integration: Once installed, the backup status is fully visible on the SolaX Cloud. You can monitor exactly how much power your “EPS loads” are drawing during a grid failure, giving you total peace of mind during extended outages.
Simplified “Plug-and-Play” Installation
The 2026 EPSBOX1 is engineered to reduce labor costs and wiring complexity. Traditionally, creating an automatic backup circuit required custom-built contactor arrays and complex interlock wiring.
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Pre-Wired Internal Logic: The EPS Box comes with all internal contactors and logic pre-configured. Installers only need to connect 6 primary wires between the inverter and the box, significantly reducing the “commissioning time” on-site.
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Durable & Compact Design: Rated at IP20 (with IP65 options available for protected outdoor areas), the unit features a compact 300 mm footprint that fits neatly next to your inverter or inside a standard electrical cabinet.
Technical Specifications (EPSBOX1)
| Feature | Specification Details |
| Model Number | X1-EPS-BOX (EPSBOX1) |
| Rated AC Voltage | 230 Vac |
| Max. AC Input Current (Grid) | 63 A |
| Max. EPS Input Current | 17 A (~3.9 kW) |
| Switching Time | < 0.5 Seconds |
| Compatible Inverters | SolaX X1-Hybrid (G4 / G4.1) & X1-Fit |
| Operating Temperature | -10°C to +50°C |
| Protection Rating | IP20 (Indoor) |
| Dimensions (WxHxD) | 300 x 220 x 170 mm |
| Net Weight | 3.0 kg |
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