Description
The Fox ESS KH8 is an 8kW single-phase hybrid solar inverter designed to provide efficient solar energy conversion, battery energy storage and backup power for residential and other single-phase applications. It is part of the Fox ESS KH/KA series of advanced hybrid and AC inverters and is compatible with Fox ESS high-voltage battery systems.The KH8 can handle up to 12kW of recommended PV input power and provides 8kW nominal AC output power, with a maximum apparent AC power of 8.8kVA. It supports high-voltage batteries with a battery voltage range of 85–480V, making it suitable for modern high-voltage energy storage systems.The inverter features IP65 protection, natural cooling, flexible installation and remote monitoring through smartphone app or web portal. Its plug-and-play design, built-in fuse protection and optional DC disconnection switch help simplify installation and system configuration.
Fox ESS KH8 8kW Single Phase Hybrid Solar Inverter
The Fox ESS KH8 is an advanced 8kW single-phase hybrid solar inverter
designed for residential and energy storage applications. It supports
high-voltage lithium-ion batteries, solar PV input, AC grid operation and
EPS backup power. The KH8 provides flexible PV configuration through
multiple MPPT trackers, high conversion efficiency, IP65 protection,
remote monitoring and parallel operation capability.
Fox ESS KH8 Technical Specifications
| Specification | Fox ESS KH8 |
|---|---|
| Brand | Fox ESS |
| Model | KH8 |
| Product Type | Single Phase Hybrid / AC Inverter |
| Battery Type | Li-Ion |
| Battery Voltage Range | 85–480V |
| Recommended Battery Voltage | 300V |
| Maximum Battery Charge Current | 50A |
| Maximum Battery Discharge Current | 50A |
| Battery Communication | CAN / RS485 |
| Battery Reverse Connection Protection | Yes |
| Maximum Recommended DC / PV Power | 12,000W / 12kW |
| Maximum DC Voltage | 600V |
| Nominal DC Operating Voltage | 360V |
| Maximum PV Input Current | 16A / 16A / 16A |
| Maximum PV Short Circuit Current | 20A / 20A / 20A |
| Maximum Inverter Backfeed Current to Array | 0mA |
| MPPT Voltage Range | 80–500V |
| Start-up Voltage | 75V |
| Number of MPP Trackers | 3 |
| Strings per MPP Tracker | 1 |
| DC Disconnection Switch | Optional |
| Nominal AC Power | 8,000VA / 8kW |
| Maximum Apparent AC Power | 8,800VA / 8.8kVA |
| Rated Grid Voltage | 220 / 230 / 240V |
| AC Voltage Range | 180–270V |
| Rated Grid Frequency | 50 / 60Hz ±5 |
| Nominal AC Current | 34.8A |
| Maximum AC Current | 38.3A |
| Displacement Power Factor | 0.8 Leading to 0.8 Lagging |
| Total Harmonic Distortion (THDi) | <3% |
| Maximum AC Input Power | 16,000VA / 16kVA |
| Maximum AC Input Current | 69.6A |
| AC Input Voltage | 220 / 230 / 240V (180–270V) |
| AC Input Frequency | 50 / 60Hz ±5 |
| Maximum EPS Power | 8,000VA / 8kVA |
| EPS Rated Voltage | 220 / 230 / 240V |
| EPS Frequency | 50 / 60Hz |
| Maximum EPS Current | 36.4A |
| EPS Peak Power | 10,000W for 60 seconds |
| EPS Switch Time | <20ms |
| EPS THDv | <2% |
| Parallel Operation | Yes, up to 10 units |
| PV Reverse Polarity Protection | Yes |
| Battery Reverse Protection | Yes |
| Anti-Islanding Protection | Yes |
| Output Short Protection | Yes |
| Leakage Current Protection | Yes |
| Insulation Resistor Detection | Yes |
| Over-current / Over-temperature Protection | Yes |
| Over Voltage Category | III (AC side), II (DC side) |
| AC/DC Surge Protection | Type II / Type II |
| AFCI Protection | Optional |
| MPPT Efficiency | 99.90% |
| Euro Efficiency | 97.40% |
| Maximum Efficiency | 97.80% |
| Maximum Battery Charge Efficiency (PV to BAT) | 98.50% |
| Maximum Battery Discharge Efficiency (BAT to AC) | 97.00% |
| Ingress Protection | IP65 |
| Protective Class | Class I |
| Operating Temperature | -25°C to +60°C (Derating at +45°C) |
| Humidity | 0–95% Non-condensing |
| Maximum Altitude | <2000m |
| Storage Temperature | -40°C to +70°C |
| Typical Noise Emission | <30dB |
| Dimensions (W × H × D) | 450 × 527 × 208mm |
| Weight | 29kg (KH) |
| Cooling Concept | Natural Cooling |
| Topology | Non-isolated |
| Communication | Meter (Optional), Wi-Fi, 4G (Optional), DRM, USB, CT, RS485 |
| LCD Display | Backlight 16 × 4 Character |
| Safety Standards | IEC62109-1 / IEC62109-2 / IEC62477-1 |
| EMC Standards | EN61000-6-1 / EN61000-6-2 / EN61000-6-3 |
| Grid Certifications | G99 / EN50549 / NRS097-2-1 |
| Certification | CE / As specified by manufacturer |





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