Fox ESS All in One PQ1 12.0kW Hybrid Off-Grid Inverter & 9.84-29.52 kWh EQ5000 Battery
A high-output single-phase solar battery system for commercial premises, farms, workshops and larger independent-energy projects, combining a 12.0kW Fox ESS PQ1 hybrid off-grid inverter with scalable EQ5000 LFP battery storage.
- 12.0kW rated AC output for single-phase solar, battery-storage and supported backup-power applications.
- Four independent MPPTs and up to 24kW PV array capacity for multi-roof, multi-string and more complex solar layouts.
- Scalable Fox ESS EQ5000 LFP battery storage from 9.84kWh to 29.52kWh nominal capacity.
Fox ESS PQ1 12.0kW Hybrid Inverter with EQ5000 Battery Storage
The Fox ESS All-in-One PQ1 12.0kW Hybrid Off-Grid Inverter & EQ5000 Battery Storage System is a modular energy-storage platform for sites requiring substantial solar-generation capacity, battery storage and managed backup power. It combines the PQ1-12.0 inverter, PV inputs, battery management and backup functions in a floor-mounted stackable arrangement.
The system is designed for single-phase applications and can be configured with two to six EQ5000 battery modules. Each battery module provides 4.92kWh nominal capacity, enabling a storage range from 9.84kWh to 29.52kWh. Final inverter, battery and backup configuration should be selected against the site’s energy demand, solar array and incoming electrical supply.
Key features
- 12.0kW single-phase output: suitable for larger properties and light-commercial installations where a single-phase supply is present.
- Four MPPT trackers: allows PV strings to be divided across different roof aspects, solar array sections or building elevations.
- Scalable LFP battery storage: configure the EQ5000 battery bank from 9.84kWh to 29.52kWh nominal energy.
- Integrated backup design: supports EPS operation for properly designed backed-up circuits, with a stated switch time of less than 4ms.
- Outdoor-capable enclosure: IP66 inverter protection and IP65 battery protection, subject to the manufacturer’s installation requirements.
Where to use
This Fox ESS PQ1 12.0kW hybrid inverter and EQ5000 battery storage system is intended for larger homes with single-phase supplies, farms, offices, workshops, small industrial units and commercial premises. It can increase on-site use of solar generation and reduce reliance on imported electricity at periods of higher demand.
It is particularly useful where solar arrays cover several roof aspects or are divided between buildings, as the inverter provides four independent MPPTs. A correctly specified EPS arrangement can maintain selected essential circuits during a grid outage, but it is not intended to back up unrestricted whole-site loads without detailed design.
This is a professionally installed energy-storage system, not a plug-in product. A competent installer must assess the electrical supply, DNO requirements, PV-string voltages, battery capacity, protection devices, isolation points and EPS load arrangement. Energian can provide UK expert support and help identify trusted installation partners.
Technical specifications
| Inverter model | Fox ESS PQ1-12.0 |
| System type | Single-phase stackable all-in-one hybrid energy-storage system |
| Compatible battery system | Fox ESS EQ5000 battery storage system |
| Battery chemistry | LFP (LiFePO₄) |
| Battery module nominal energy | 4.92kWh |
| Battery module quantity | 2–6 modules |
| Nominal battery storage capacity | 9.84–29.52kWh |
| Battery depth of discharge | 90% |
| Battery communication | CAN |
| Maximum PV array power | 24,000W |
| Maximum PV input power | 20,000W |
| Maximum PV input voltage | 600V |
| Minimum PV input voltage | 75V |
| PV start-up voltage | 80V |
| Nominal PV input voltage | 360V |
| MPPT voltage range | 80–550V |
| MPPT voltage range at full load | 105–550V |
| Independent MPPT trackers | 4 |
| Strings per MPPT tracker | 1 + 1 + 1 + 1 |
| Maximum PV input current | 20A / 20A / 20A / 20A |
| Maximum PV short-circuit current | 25A / 25A / 25A / 25A |
| Maximum battery charge power | 12,000W |
| Maximum battery discharge power | 12,000W |
| Rated AC output power | 12,000W |
| Rated AC apparent power | 12,000VA |
| Maximum AC apparent power | 13,200VA |
| Rated grid voltage | 220V / 380V, 230V / 400V, 240V / 415V; 3L / N / PE |
| Rated grid frequency | 50Hz / 60Hz |
| Rated output current | 17.4A |
| Maximum output current | 19.1A |
| Maximum AC input apparent power | 20,000VA |
| Maximum AC input current | 28.9A |
| EPS maximum apparent power | 12,000VA |
| EPS rated voltage | 220V / 380V, 230V / 400V, 240V / 415V; 3L / N / PE |
| EPS rated frequency | 50Hz / 60Hz |
| EPS maximum output current | 17.4A |
| EPS transfer time | Less than 4ms |
| Maximum MPPT efficiency | 99.90% |
| Maximum conversion efficiency | 98.00% |
| European efficiency | 97.50% |
| Installation | Floor-mounted stackable all-in-one system |
| Inverter dimensions | 570 × 420 × 380mm |
| Inverter net weight | Approximately 35kg |
| Battery dimensions | 570 × 375 × 380mm |
| Battery system weight, 2-module configuration | 97.2kg |
| Inverter ingress protection | IP66 |
| Battery ingress protection | IP65 |
| Inverter operating temperature | -25°C to +60°C; derating above 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 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 |
| Battery fire protection function | Yes |
| Inverter safety standards | EN/IEC 62109-1, EN/IEC 62109-2, EN/IEC 62477-1 |
| 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 Installation Guides
- 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 with PV-string design, inverter selection, battery sizing, single-phase EPS-load planning, grid-connection considerations and suitable installer options.