Fox ESS Small C&I Hybrid Energy Storage System With H3 PRO 30 kW Inverter and 29.5/59.0 kWh Battery
Fox ESS Small C&I Hybrid Energy Storage System with H3 PRO 30kW Inverter and 29.52kWh / 59.04kWh EQ5000 Battery
- Store solar generation or charge during scheduled lower-cost electricity periods for use when your business needs it.
- Choose 29.52kWh or 49.20kWh nominal battery storage, supplied as two Fox ESS EQ5000 high-voltage stacks.
- Combine a 30kW three-phase hybrid inverter, three-phase CT meter and optional solar array with UK system-design and installation support.
Fox ESS H3 PRO 30kW hybrid energy storage for small businesses
This Fox ESS hybrid energy storage system combines the H3-Pro-30.0 three-phase inverter with modular EQ5000 lithium iron phosphate batteries. It supports solar self-consumption, scheduled grid charging, export management and peak-shaving settings. Suitable applications include workshops, offices, agricultural buildings and smaller commercial premises with an appropriate three-phase electrical supply.
Key features
- Two storage options: 6 x 4.92kWh modules provide 29.52kWh nominal capacity; 12 x 4.92kWh modules provide 59.04kWh.
- Separate high-voltage battery inputs: each stack has its own EQ5000-M master module and connects to the corresponding inverter battery input and BMS communication port.
- Flexible solar integration: three independent MPPTs, with two string inputs per tracker. Solar panels, mounting and project-specific cabling are available separately.
- Configurable energy management: self-use, feed-in priority, backup and peak-shaving functions, with scheduled charging and remote monitoring.
- Emergency power capability: the EPS output can supply suitably designed essential-load circuits when the grid fails, within the available battery, solar and inverter limits.
Choose your battery capacity
| Package | 29.52kWh option | 59.04kWh option |
|---|---|---|
| Number of battery stacks | 2 | 2 |
| Battery arrangement per each stack | 1 × EQ5000-Master & 2 x EQ5000-Slave | 1 × EQ5000-Master & 5 x EQ5000-Slave |
| Total nominal stored energy | 29.52kWh | 59.04kWh |
| Calculated DC energy at 90% depth of discharge | Approximately 26.57kWh | Approximately 53.14kWh |
| Nominal voltage per stack | 192V | 384V |
| Operating voltage per stack | 174–219V | 348–438V |
| Dimensions per stack, W × H × D | 570 × 510 × 380mm | 570 × 915 × 380mm |
| Weight per stack | 140.7kg | 271.2kg |
Calculated DC energy is nominal capacity multiplied by the specified 90% depth of discharge. Energy delivered to AC loads will be lower after conversion losses, standby consumption and any configured reserve.
The 30kW figure is the inverter rating, not guaranteed battery-only output for every package. The 29.52kWh option’s 174–219V stacks are below the published 220V minimum for full-load battery operation. The 59.4kWh option is within that voltage range, but actual power still depends on battery current limits, temperature, state of charge and system settings.
Where to use
Use the system to increase on-site consumption of solar generation, move eligible electricity purchases into lower-cost periods, or support selected commercial loads during an outage. The appropriate capacity depends on your load profile, tariff, solar generation and required backup reserve.
For logistics facilities, workshops and agricultural sites, the installer must assess motor starting, phase loading and essential circuits. Backup duration and bill savings cannot be guaranteed without a site-specific assessment.
Operating modes and electricity tariffs
- Self-use: prioritise local loads, then battery charging, with surplus solar available for export where permitted.
- Feed-in priority: prioritise local loads and permitted export before charging the battery.
- Backup: supply selected EPS circuits from available battery energy and solar generation during a grid outage.
- Peak shaving: use battery energy to help manage imports above a configured limit, while sufficient energy remains available.
- Scheduled charging: set charging periods to suit an eligible electricity tariff. Automatic tracking of live tariff prices is not assumed included.
EQ5000 battery specifications
| Specification | Value |
|---|---|
| Battery family | Fox ESS EQ5000 |
| Master module | EQ5000-M, incorporating battery module and system controller |
| Slave module | EQ5000-S |
| Battery chemistry | LFP / LiFePO₄ |
| Nominal energy per module | 4.92kWh |
| Nominal module voltage | 64V |
| Nominal capacity | 77Ah |
| Recommended discharge current | 38.5A per stack |
| Maximum charge/discharge current | 50A per stack, subject to BMS and operating conditions |
| Peak discharge current | 65A for 60 seconds per stack |
| Battery-pack round-trip efficiency | >95%; not the complete system’s AC round-trip efficiency |
| Depth of discharge | 90% |
| Cycle life | ≥6,000 cycles under the datasheet conditions: 25°C, 90% depth of discharge and 0.5C charging/discharging; not a warranty duration |
| Communication | CAN |
| Status indicators | EQ5000-S: 1 LED; EQ5000-M: 6 LEDs |
| Maximum modules per series stack | 6: 1 master + 5 slave modules |
| Maximum nominal capacity per stack | 29.52kWh; expansion requires confirmation against inverter compatibility, firmware and installation requirements |
| Installation arrangement | Floor-standing, indoor or suitably sheltered outdoor location, following the installation manual |
| Charging temperature | 0°C to +55°C |
| Low-temperature charging | Charge derating occurs between 0°C and +15°C |
| Discharging temperature | −10°C to +55°C |
| Storage temperature | −10°C to +50°C |
| Cooling | Natural convection |
| Humidity | 5–95%, non-condensing |
| Ingress protection | IP65; observe the manual’s restrictions on direct rain, snow accumulation and installation exposure |
| Safety standard listed | IEC 62619 |
| EMC standards listed | IEC 61000-6-1/2/3/4 |
| Transport testing listed | UN38.3 |
This package specifies standard EQ5000 batteries, not the optional “(w)” warm-up versions. Do not assume that self-heating or sub-zero charging is included.
Battery stack dimensions and weights above follow the supplied EQ5000 datasheet v1.2 dated 16 April 2025. The supplied manual gives different weight figures, so confirm the exact hardware revision, installation dimensions and handling weight before delivery.
H3 PRO 30kW inverter specifications
| Specification | Fox ESS H3-Pro-30.0 |
|---|---|
| Solar PV inputs | |
| Independent MPPTs | 3 |
| String inputs per MPPT | 2; 6 string inputs in total |
| Maximum recommended DC input power | 45,000W total; manufacturer specifies 15,000W per MPPT for this model |
| Maximum DC voltage rating | 1,000V; manufacturer specifies maximum operating voltage of 950V |
| Nominal DC operating voltage | 750V |
| Start-up voltage | 160V |
| MPPT operating voltage range | 150–850V |
| Full-load MPPT voltage range | 230–850V |
| Maximum input current per MPPT | 32A, arranged as 16A + 16A |
| Maximum short-circuit current per MPPT | 40A, arranged as 20A + 20A |
| Battery inputs | |
| Battery inputs | 2 |
| Battery operating voltage range | 150–800V |
| Full-load battery voltage range | 220–790V |
| Maximum charge/discharge current | 50A + 50A across the two battery inputs |
| Battery communication | CAN |
| Grid connection and AC output | |
| Supply arrangement | Three-phase: 3L / N / PE |
| Rated AC voltage | 400/230V or 380/220V |
| Rated grid frequency | 50/60Hz |
| Nominal AC output rating | 30,000VA; 30kW at unity power factor |
| Maximum apparent AC output | 33,000VA |
| Maximum AC output current per phase | 50.0A |
| Maximum AC input power | 35,000VA |
| Maximum AC input current per phase | 53.0A |
| Power factor | 1; adjustable from 0.8 leading to 0.8 lagging |
| Export control | Supported with suitable metering and configuration |
| AC current distortion | THDi <3% at rated power |
| EPS backup output | |
| Maximum apparent output | 30,000VA, subject to available battery/PV power |
| Peak apparent output | 36,000VA for 60 seconds, subject to battery, operating and load limits |
| Maximum current per phase | 45.5A |
| Output voltage and frequency | 400/230V or 380/220V; 50/60Hz |
| Changeover time | <10ms in the manufacturer’s v2.6 datasheet; verify suitability for sensitive equipment |
| Efficiency and construction | |
| MPPT efficiency | 99.90% |
| Maximum conversion efficiency | 97.20% |
| Maximum battery-to-AC efficiency | 97.20% |
| Maximum PV-to-battery efficiency | 98.10% |
| European efficiency | 96.30% |
| Dimensions, W × H × D | 600 × 560 × 225mm |
| Net weight | 52.5kg |
| Mounting | Wall-mounted |
| Operating temperature | −25°C to +60°C; derating at 45°C |
| Storage temperature | −40°C to +70°C |
| Humidity | 0–95%, non-condensing |
| Ingress protection | IP65 |
| Cooling | Smart fan cooling |
| Monitoring | FoxCloud app and web portal, with an appropriate communications connection |
| AC/DC surge protection | Type II / Type II |
| Safety standards listed | EN 62109-1 and EN 62109-2 |
| EMC standards listed | IEC 61000-6-2 and IEC 61000-6-3 |
Inverter figures above follow the manufacturer’s H3 PRO datasheet v2.6. Features and ratings must be checked against the supplied hardware, firmware and applicable installation manual.
Package contents
- 1 × Fox ESS H3-Pro-30.0 three-phase hybrid inverter.
- 1 × compatible Fox three-phase CT meter.
- 29.52kWh option: 2 × EQ5000-M master batteries and 4 × EQ5000-S slave batteries, forming two three-module stacks.
- 59.04kWh option: 2 × EQ5000-M master batteries and 10 × EQ5000-S slave batteries, forming two six-module stacks.
- Optional solar panels, mounting, cabling and installation accessories, quoted separately to suit the project.
The final quotation must identify the battery connection equipment, communications leads and installation accessories supplied. Site-specific protection, distribution alterations, EPS circuits and installation labour are not assumed included.
Installation and compatibility
This is a professionally installed high-voltage system, not a plug-in appliance. Energian can help arrange installation through trusted partners, including equipment selection, commissioning and an assessment of the premises’ three-phase supply and required grid-connection approvals.
Use matching EQ5000 modules within each stack. Each stack requires its own master module and the correct power, communication and protective-earth connections.
The installation must account for battery temperature, ventilation, service clearances, floor loading, cable routes and protected essential-load distribution. EPS capability does not mean that every circuit or the full premises can automatically be backed up.
Documents available for download
- Fox ESS EQ5000 battery datasheet
- Fox ESS EQ5000 battery installation manual
- Fox ESS EQ5000 battery user manual
- Fox ESS H3 PRO inverter datasheet
- Fox ESS H3 PRO inverter installation manual
- Fox ESS H3 PRO inverter user manual
Shipping
Shipping is available to the UK, Ireland, Africa, the Caribbean and worldwide, subject to destination and transport requirements. If a shipping rate is not shown at checkout, contact us on +44 20 8064 0335 or info@energian.co.uk for a quote.
Confirm delivery access, unloading arrangements and the final equipment weights before dispatch. Battery transport and installation positioning must be planned for the selected package.
UK expert support
Contact Energian’s UK team with questions about capacity, solar integration, tariffs, backup operation or installation. We can help select an appropriate configuration and put you in touch with trusted installation partners.
Call +44 20 8064 0335, email info@energian.co.uk, use live chat, or arrange an in-person consultation at our office.