The Fox ESS EPS-BOX-SP is a single-phase whole-home backup gateway designed to provide emergency power during grid outages. The unit automatically switches between on-grid and off-grid operation, restoring power to connected circuits after a short transfer delay. This EPS functionality allows your home to continue operating during outages, subject to system sizing and load requirements.
With a robust IP65-rated metal enclosure and a high 100A maximum input current, the EPS-BOX-SP delivers exceptional performance, safety, and durability — making it the perfect partner for your Fox ESS inverter system.
Whole Home Backup – Automatically powers your home during grid failures.
Whole Home EPS – Supports full-home backup (subject to system sizing.)
High Power Handling – Supports up to 100A max input current.
Universal Compatibility – Works with H1-G2, KH, EVO & PowerQ inverters.
Rugged Construction – IP65-rated metal enclosure for indoor or outdoor installation.
Smart Monitoring – Integrated RS-485 meter for accurate measurement and control.
Easy Installation – Wall-mounted design with natural cooling.
The EPS-BOX-SP sits between your Fox ESS inverter, utility supply, and household circuits.
Normal Operation – The grid supplies loads, supported by solar and battery.
Power Outage – The EPS-BOX-SP isolates the property from the grid and, after a short transfer delay, restores power using battery and solar.
A short interruption (typically 2–3 seconds) occurs during transfer.
The EPS-BOX-SP delivers the peace of mind that comes from knowing your home will stay powered, no matter what. Whether you’re protecting against short-term outages or ensuring continuous operation for critical systems, it’s your ultimate whole home backup solution.
| Parameter | Specification |
|---|---|
| Rated Voltage | 220 / 230 / 240 V, L/N/PE |
| Rated Frequency | 50 / 60 Hz |
| Max Input Current | 100A (utility supply), 63A (inveter) |
| Max Output Current | 100A |
| Operating Temp | -25°C to +60°C |
| Cooling | Natural |
| Installation | Wall-mounted |
| Ingress Protection | IP65 |
| Dimensions (W x H x D) | 420 × 550 × 138.5 mm |
| Weight | 16 kg (net) |
| Communication | RS-485 Meter |
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