All in One Fox ESS PQ1 5.0kW Hybrid Off-Grid Inverter & 9.84-29.52 kWh EQ5000-S Battery
A compact hybrid off-grid energy-storage system for solar self-consumption, battery backup and independent power applications, combining a 5.0kW single-phase PQ1 inverter with 9.84-29.52kWh of Fox ESS EQ5000-S LFP battery storage.
- 5.0kW hybrid inverter with 3 MPPTs, up to 20kW PV array power and up to 19kW PV input power.
- 9.84kWh high-voltage LFP battery storage, scalable to 29.52kWh.
- Integrated 63A bypass capability and less than 4ms switch time for supported backup-power arrangements.
Fox ESS PQ1 5.0kW Hybrid Inverter with EQ5000-S Battery
The Fox ESS All-in-One PQ1 5.0kW Hybrid Off-Grid Inverter & EQ5000-S Battery Storage System combines solar PV conversion, high-voltage battery storage and backup capability in a floor-mounted energy-storage platform. It is intended for single-phase residential and light-commercial installations where solar generation, stored energy and essential-load backup need to work together.
The 5.0kW PQ1 inverter supports up to 20kW of connected PV array power, three independent MPPTs and an 80–500V battery operating range. The included EQ5000-S battery system provides 9.84-29.52kWh nominal energy.
Key features
- Solar and battery in one system: use solar energy directly, store surplus generation and discharge the battery when solar production is low.
- Flexible PV design: three MPPT trackers with 20A maximum input current per tracker on the PQ1-5.0kW model.
- Backup-ready architecture: 5,000VA maximum EPS apparent power, 40A load-start capability and less than 4ms stated switch time.
- Scalable LFP battery storage: the 9.84kWh EQ5000-S battery can be expanded to 29.52kWh using additional EQ5000-S battery modules.
- Outdoor-capable equipment: PQ1 inverter rated IP66 and EQ5000-S battery system rated IP65, subject to installation in accordance with the manufacturer’s requirements.
Where to use
This Fox ESS PQ1 5.0kW hybrid inverter and EQ5000-S battery system is suited to homes, offices, workshops, small commercial premises and rural properties with a single-phase electricity supply. It can support solar self-consumption and planned backup circuits where the electrical design allows.
Typical applications include storing daytime PV generation for evening use, providing resilience for selected essential circuits, reducing grid imports at high-use periods and building a larger battery bank as energy demand increases. Backup loads, solar-string configuration, protective devices and grid connection requirements must be designed for the individual site.
This is not an out-of-the-box plug-in product. Installation, commissioning and any connection to the public electricity network should be completed by a competent installer in line with applicable UK electrical, DNO and manufacturer requirements. Use a trusted Energian installation partner where required.
Technical specifications
| Inverter model | Fox ESS PQ1-5.0kW |
| Inverter type | Single-phase hybrid / AC stackable all-in-one energy-storage system |
| Battery model | Fox ESS EQ5000-S |
| Battery type | LFP (LiFePO₄) |
| Battery nominal energy | 4.92kWh |
| Battery nominal voltage | 128V |
| Battery operating voltage | 116.0–146.0V |
| Recommended battery discharge current | 38.5A |
| Maximum battery charge/discharge current | 50A |
| Battery peak discharge current | 65A for 60 seconds |
| Battery round-trip efficiency | Greater than 95% |
| Battery depth of discharge | 90% |
| Battery communication | CAN |
| Battery scalability | Maximum 6 modules in series; 8.94kWh to 29.52kWh nominal energy |
| Maximum PV array power | 20,000W |
| Maximum PV input power | 19,000W |
| Maximum PV input voltage | 600V |
| Minimum PV input voltage | 80V |
| PV start-up voltage | 121V |
| PV MPPT voltage range | 130–550V |
| Number of MPPT trackers | 3 |
| Strings per MPPT tracker | 1 + 1 + 1 |
| Maximum PV input current | 20A / 20A / 20A |
| Maximum PV short-circuit current | 25A / 25A / 25A |
| Battery voltage range, inverter | 80–500V |
| Minimum operating battery voltage | 80V |
| Maximum battery charge power | 5,000W |
| Maximum battery discharge power | 5,000W |
| Maximum charge/discharge current, inverter | 50A / 50A |
| Rated AC output power | 5,000W |
| Rated AC apparent power | 5,000VA |
| Maximum AC apparent power | 5,500VA |
| Rated grid voltage | 220V / 230V / 240V, L / N / PE |
| Rated grid frequency | 50Hz / 60Hz, ±5 |
| Rated output current | 22.7A |
| Maximum output current | 25.0A |
| Maximum AC input apparent power | 7,000VA |
| Maximum AC input current | 32.0A |
| EPS maximum apparent power | 5,000VA |
| EPS load-start capability | 40A |
| EPS rated voltage | 220V / 230V / 240V, L / N / PE |
| EPS rated frequency | 50Hz / 60Hz |
| EPS maximum output current | 22.7A |
| EPS switch time | Less than 4ms |
| Maximum static MPPT efficiency | 99.90% |
| Maximum conversion efficiency | 97.62% |
| European efficiency | 97.20% |
| Maximum battery charge efficiency, PV to battery | 97.33% |
| Maximum battery discharge efficiency, battery to AC | 96.40% |
| Bypass capability | Built-in 63A bypass |
| Inverter dimensions | 570 × 420 × 380mm |
| Inverter net weight | 35.0kg |
| Battery dimensions | 570 × 380 × 380mm |
| Battery weight | 56.3kg |
| Inverter installation | Floor-mounted |
| Inverter operating temperature | -25°C to +60°C; derating at 45°C |
| Battery operating temperature | Charge: 0°C to 55°C; discharge: -10°C to 55°C |
| Battery operating temperature with optional warm-up | Charge: -25°C to 55°C; discharge: -25°C to 55°C |
| Inverter ingress protection | IP66 |
| Battery ingress protection | IP65 |
| Battery fire protection function | Yes |
| Inverter communications | Ethernet, EMS (RS485), meter, WiLAN (Wi-Fi + LAN + Bluetooth), 4G optional, DRM, ripple control, USB, BMS (CAN), SG Ready |
| Inverter display | LED, LCD, app and website |
| Inverter safety standards | EN/IEC 62109-1, EN/IEC 62109-2, EN/IEC 62477-1, EN/IEC 62040 (AU) |
| Battery safety standard | IEC 62619 |
| Battery transport standard | UN38.3 |
Documents available for download
- Fox ESS PQ1 Stackable All-in-One Datasheet
- Fox ESS PQ1 Stackable All-in-One Quick Installation Guide
- Fox ESS PQ1 Stackable All-in-One User Manual
Shipping
Available for delivery to the UK, Ireland, Africa, the Caribbean and worldwide. If the shipping rate is not shown at checkout, please contact us on +44 2080 640335 or info@energian.co.uk for a quote.
UK expert support
UK expert support is available. Contact Energian with questions or support requests by telephone, email or live chat, or visit our office for an in-person consultation. We can help assess PV-string design, battery capacity, backup-load requirements, expansion options and suitable installation arrangements.