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Fox ESS H3 Pro 25.0kW Hybrid Inverter with ECS4300 Battery stack of 7 - 29.03kWh
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FE-H3-PRO-25.0-ECS4300 | Complete 25kW 3PH hybrid system with 29.03kWh ECS4300 battery stack (1 Master + 6 Slave) for enterprise commercial solar + storage deployments.
System Components
- 1x H3 Pro 25kW 3PH Hybrid Inverter FE-H3-PRO-25.0 (3 MPPT/6 strings, 97.5% efficiency)
- 1x ECS4300 Master Battery FE-HV-ECM-4300 (4.14kWh LiFePO4)
- 6x ECS4300 Slave Batteries FE-HV-ECS-4300 (4.14kWh each)
- Total Capacity: 29.03kWh (90% DoD, 6000+ cycles)
- Full 3-phase EPS backup with 27.5kW surge (1 sec)
Key System Performance
| Inverter Rated Power | 25kW (3-phase) |
| Max PV Input | 37.5kW (3 MPPT/6 strings) |
| Battery Voltage Range | 160-1000V DC |
| Max Charge/Discharge | 100A continuous |
| Round Trip Efficiency | >95% |
| Max Efficiency | 97.5% |
Battery Specifications (ECS4300 Stack)
| Total Capacity | 29.03kWh |
| Nominal Voltage | 403.2V (7 modules) |
| Operating Voltage | 340.2-459.9V |
| Recommended Current | 35A |
| Max Charge/Discharge | 50A |
| Peak Discharge | 65A (30 sec) |
Mechanical & Installation
| Inverter Dimensions | 720 × 680 × 370 mm (57.5kg) |
| Battery Stack Dimensions | 570 × 950 × 380 mm |
| Total System Weight | 320+ kg |
| Protection Rating | IP65 / Type 4X |
| Cooling | Smart fan cooling |
Features & Warranty
- Plug-and-play with 3PH meter, CT clamps, MC4 connectors included
- Parallel up to 10 inverters (250kW / 290kWh total systems)
- Requires H3 Pro EMS box for multi-unit coordination
- 5-year inverter warranty (extendable to 10 years via registration)
- 10-year battery warranty at 6000+ cycles (90% DoD)
- G99 compliant with Octopus Energy smart tariff integration
MPN: FE-H3-PRO-25.0-ECS4300
Model: H3 Pro 25kW + ECS4300 Stack x7 (29.03kWh)
Complete turnkey commercial hybrid power system delivering 25kW three-phase output with 29kWh high-voltage storage, full EPS backup, and enterprise scalability for maximum energy independence.
- Type Solar
- Vendor Fox ESS
- SKU FE-H3-PRO-25.0-ECS4300
Please note: Delivery times may vary depending on location, with specific details outlined below.
Standard Delivery
UK Mainland
- Delivery Time: 2–4 working days
- Free Delivery on most orders
- £4.95 for small items
- £69 for Solar Panels, Batteries and other specialized large items delivery
Express Delivery
UK Mainland
- Delivery Time: 1–3 working days
- Free Delivery
- £4.95 delivery for small items
Channel Islands
- Postcodes Covered: GY*, IM*, JE*
- Minimum Order: £50
- Delivery Fee: £70
Northern Ireland, Offshore Territories & Scottish Islands
- Postcodes Covered: BT*, HS*, KW, ZE
- Minimum Order: £50
- Delivery Fee: £35
Same Day Delivery
- Eligible Postcodes:
E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW* - Minimum Order: £50
- Same Day Delivery Fee: £70
- Special Requests or Locations:
For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.
Collections
Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.
Collection address: 284 Water Rd, Unit 9, London, HA0 1HX
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