
Fox ESS EP12 Plus 11.52kWh 384V LiFePO4 High Voltage Battery with Heating Element – IP65, Scalable to 46.08kWh, 10-Year Warranty
Fox ESS EP12 Plus 11.52kWh 384V LiFePO4 High Voltage Battery with Heating Element – IP65, Scalable to 46.08kWh, 10-Year Warranty
The Fox ESS EP12 Plus is an 11.52 kWh high-voltage LiFePO₄ solar battery designed for UK homes and small businesses pairing with Fox ESS hybrid or AC-coupled inverters. With a 384V nominal voltage, 90% depth of discharge (10.37 kWh usable) and ≥95% round-trip efficiency, it delivers one of the most energy-dense and efficient high-voltage storage modules at this capacity. The integrated self-heating element allows safe charging in cold installations — garages, outbuildings and outdoor enclosures — while the IP65 rating makes it fully weatherproof for permanent outdoor mounting. Built-in fire protection is included as standard. Up to 4 units can be combined in parallel via the Fox EP Junction Box, scaling to 46.08 kWh from a single inverter port. This is Fox ESS's first slimline wall-mountable large-capacity battery, at just 185mm depth.
| Model | Nominal | Usable | Voltage | Op. Range | Max I (C/D) | Max Capacity |
| EP6 Plus | 5.76 kWh | 5.18 kWh | 192 V | 174–219 V | 30A / 30A | 23.04 kWh |
| EP12 Plus ✓ | 11.52 kWh | 10.37 kWh | 384 V | 348–438 V | 30A / 30A | 46.08 kWh |
All models: LiFePO₄, IP65, 90% DoD, ≥95% RTE, 10-year warranty, CAN comms. This listing covers the highlighted row.
| Electrical Characteristics | |
| Battery Type | LFP (LiFePO₄) |
| Nominal Energy | 11.52 kWh |
| Usable Energy (90% DoD) | 10.37 kWh |
| Nominal Voltage | 384 V |
| Operating Voltage Range | 348 – 438 V |
| Max. Charge / Discharge Current | 30 A / 30 A |
| Recommended Charge Current | 15 A |
| Peak Discharge Current | 65 A (@ 60s) |
| Peak Charge Current | 36 A (@ 5s) |
| Round-Trip Efficiency | ≥ 95% |
| Depth of Discharge | 90% |
| Communication | CAN |
| Display | LED × 5 |
| Scalability | Max. 4 units in parallel |
| Operating Conditions | |
| Operating Temperature — Charge | 0°C to +55°C |
| Operating Temperature — Discharge | -10°C to +55°C |
| Storage Temperature | -10°C to +40°C |
| Relative Humidity | 5% – 95% (no condensation) |
| Max. Altitude | 3,000 m |
| Installation Location | Indoor or Outdoor |
| Cooling Method | Natural convection (passive) |
| Mechanical | |
| Dimensions (W × H × D) | 710 × 640 × 185 mm |
| Weight | 98 kg |
| Mounting | Wall or floor |
| Protection & Safety | |
| Ingress Protection | IP65 |
| Fire Protection Function | Yes — integrated (standard on EP12 Plus) |
| Warming Function | Optional (with heating element variant) |
| Certifications | |
| Safety | IEC 62619 |
| EMC | EN IEC 61000-6-1/2/3/4 |
| Transport | UN 38.3 |
| Warranty & Inverter Compatibility | |
| Warranty | 10 years |
| Cycle Rating | > 6,000 cycles |
| Compatible Inverters | Fox ESS H1, KH, H3, H3 Smart, H3 Pro, US series |
| Max System Capacity (per inverter port) | 46.08 kWh (4 × EP12 Plus) |
| Junction Box Required (2+ units) | Fox ESS FE-JUNBOX-HV |
Original: $3,854.66
-65%$3,854.66
$1,349.13More Images


Fox ESS EP12 Plus 11.52kWh 384V LiFePO4 High Voltage Battery with Heating Element – IP65, Scalable to 46.08kWh, 10-Year Warranty
The Fox ESS EP12 Plus is an 11.52 kWh high-voltage LiFePO₄ solar battery designed for UK homes and small businesses pairing with Fox ESS hybrid or AC-coupled inverters. With a 384V nominal voltage, 90% depth of discharge (10.37 kWh usable) and ≥95% round-trip efficiency, it delivers one of the most energy-dense and efficient high-voltage storage modules at this capacity. The integrated self-heating element allows safe charging in cold installations — garages, outbuildings and outdoor enclosures — while the IP65 rating makes it fully weatherproof for permanent outdoor mounting. Built-in fire protection is included as standard. Up to 4 units can be combined in parallel via the Fox EP Junction Box, scaling to 46.08 kWh from a single inverter port. This is Fox ESS's first slimline wall-mountable large-capacity battery, at just 185mm depth.
| Model | Nominal | Usable | Voltage | Op. Range | Max I (C/D) | Max Capacity |
| EP6 Plus | 5.76 kWh | 5.18 kWh | 192 V | 174–219 V | 30A / 30A | 23.04 kWh |
| EP12 Plus ✓ | 11.52 kWh | 10.37 kWh | 384 V | 348–438 V | 30A / 30A | 46.08 kWh |
All models: LiFePO₄, IP65, 90% DoD, ≥95% RTE, 10-year warranty, CAN comms. This listing covers the highlighted row.
| Electrical Characteristics | |
| Battery Type | LFP (LiFePO₄) |
| Nominal Energy | 11.52 kWh |
| Usable Energy (90% DoD) | 10.37 kWh |
| Nominal Voltage | 384 V |
| Operating Voltage Range | 348 – 438 V |
| Max. Charge / Discharge Current | 30 A / 30 A |
| Recommended Charge Current | 15 A |
| Peak Discharge Current | 65 A (@ 60s) |
| Peak Charge Current | 36 A (@ 5s) |
| Round-Trip Efficiency | ≥ 95% |
| Depth of Discharge | 90% |
| Communication | CAN |
| Display | LED × 5 |
| Scalability | Max. 4 units in parallel |
| Operating Conditions | |
| Operating Temperature — Charge | 0°C to +55°C |
| Operating Temperature — Discharge | -10°C to +55°C |
| Storage Temperature | -10°C to +40°C |
| Relative Humidity | 5% – 95% (no condensation) |
| Max. Altitude | 3,000 m |
| Installation Location | Indoor or Outdoor |
| Cooling Method | Natural convection (passive) |
| Mechanical | |
| Dimensions (W × H × D) | 710 × 640 × 185 mm |
| Weight | 98 kg |
| Mounting | Wall or floor |
| Protection & Safety | |
| Ingress Protection | IP65 |
| Fire Protection Function | Yes — integrated (standard on EP12 Plus) |
| Warming Function | Optional (with heating element variant) |
| Certifications | |
| Safety | IEC 62619 |
| EMC | EN IEC 61000-6-1/2/3/4 |
| Transport | UN 38.3 |
| Warranty & Inverter Compatibility | |
| Warranty | 10 years |
| Cycle Rating | > 6,000 cycles |
| Compatible Inverters | Fox ESS H1, KH, H3, H3 Smart, H3 Pro, US series |
| Max System Capacity (per inverter port) | 46.08 kWh (4 × EP12 Plus) |
| Junction Box Required (2+ units) | Fox ESS FE-JUNBOX-HV |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Fox ESS EP12 Plus is an 11.52 kWh high-voltage LiFePO₄ solar battery designed for UK homes and small businesses pairing with Fox ESS hybrid or AC-coupled inverters. With a 384V nominal voltage, 90% depth of discharge (10.37 kWh usable) and ≥95% round-trip efficiency, it delivers one of the most energy-dense and efficient high-voltage storage modules at this capacity. The integrated self-heating element allows safe charging in cold installations — garages, outbuildings and outdoor enclosures — while the IP65 rating makes it fully weatherproof for permanent outdoor mounting. Built-in fire protection is included as standard. Up to 4 units can be combined in parallel via the Fox EP Junction Box, scaling to 46.08 kWh from a single inverter port. This is Fox ESS's first slimline wall-mountable large-capacity battery, at just 185mm depth.
| Model | Nominal | Usable | Voltage | Op. Range | Max I (C/D) | Max Capacity |
| EP6 Plus | 5.76 kWh | 5.18 kWh | 192 V | 174–219 V | 30A / 30A | 23.04 kWh |
| EP12 Plus ✓ | 11.52 kWh | 10.37 kWh | 384 V | 348–438 V | 30A / 30A | 46.08 kWh |
All models: LiFePO₄, IP65, 90% DoD, ≥95% RTE, 10-year warranty, CAN comms. This listing covers the highlighted row.
| Electrical Characteristics | |
| Battery Type | LFP (LiFePO₄) |
| Nominal Energy | 11.52 kWh |
| Usable Energy (90% DoD) | 10.37 kWh |
| Nominal Voltage | 384 V |
| Operating Voltage Range | 348 – 438 V |
| Max. Charge / Discharge Current | 30 A / 30 A |
| Recommended Charge Current | 15 A |
| Peak Discharge Current | 65 A (@ 60s) |
| Peak Charge Current | 36 A (@ 5s) |
| Round-Trip Efficiency | ≥ 95% |
| Depth of Discharge | 90% |
| Communication | CAN |
| Display | LED × 5 |
| Scalability | Max. 4 units in parallel |
| Operating Conditions | |
| Operating Temperature — Charge | 0°C to +55°C |
| Operating Temperature — Discharge | -10°C to +55°C |
| Storage Temperature | -10°C to +40°C |
| Relative Humidity | 5% – 95% (no condensation) |
| Max. Altitude | 3,000 m |
| Installation Location | Indoor or Outdoor |
| Cooling Method | Natural convection (passive) |
| Mechanical | |
| Dimensions (W × H × D) | 710 × 640 × 185 mm |
| Weight | 98 kg |
| Mounting | Wall or floor |
| Protection & Safety | |
| Ingress Protection | IP65 |
| Fire Protection Function | Yes — integrated (standard on EP12 Plus) |
| Warming Function | Optional (with heating element variant) |
| Certifications | |
| Safety | IEC 62619 |
| EMC | EN IEC 61000-6-1/2/3/4 |
| Transport | UN 38.3 |
| Warranty & Inverter Compatibility | |
| Warranty | 10 years |
| Cycle Rating | > 6,000 cycles |
| Compatible Inverters | Fox ESS H1, KH, H3, H3 Smart, H3 Pro, US series |
| Max System Capacity (per inverter port) | 46.08 kWh (4 × EP12 Plus) |
| Junction Box Required (2+ units) | Fox ESS FE-JUNBOX-HV |












