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Fox ESS ECS4100 4.03kWh HV Battery (Master) V2
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FE-HV-ECM-4100 | 4.03kWh high-voltage LiFePO₄ master battery module for Fox ECS4100 stacks, scalable up to 28.21kWh with additional slave batteries.
Key Features
- Master module for the Fox ECS4100 high-voltage battery system (controls up to 6 slave batteries).
- 4.03kWh nominal capacity with 90% depth of discharge for high usable energy per module.
- Scalable from 4.03kWh to 28.21kWh per stack (1× master + up to 6× slaves).
- High-voltage LiFePO₄ chemistry for long cycle life, high safety and wide temperature tolerance.
- Plug-and-play, stackable design with simple buckle fixing for fast installation.
- CAN/RS485 communication with Fox ESS hybrid and AC chargers for seamless integration.
- IP65 enclosure for indoor or outdoor installation.
Battery Specifications (per Master Module)
| Battery Type | Lithium Iron Phosphate (LiFePO₄) |
| Nominal Energy | 4.03kWh |
| Usable Capacity (at 90% DoD) | ≈ 3.63kWh |
| Nominal Voltage | ≈ 52–57 V (single module within HV stack) |
| Depth of Discharge | 90% |
| Recommended Charge/Discharge Current | 25 A |
| Max Charge/Discharge Current | 50 A |
| Peak Discharge Current | 65 A (30 seconds) |
| Round-trip Efficiency | > 95% |
| Cycle Life | > 6000 cycles (at 90% DoD, 25°C) |
System Configuration (Master + Slaves)
| Minimum Stack | 1× Master + 1× Slave (8.06kWh nominal) |
| Maximum Stack | 1× Master + 6× Slaves (28.21kWh nominal) |
| Nominal Voltage (1–7 modules) | ≈115.2V to 403.2V (depending on number of modules) |
| Operating Voltage Range | varies from ≈97.2–459.9V across 1–7 modules |
| Communication | CAN / RS485 to inverter and between modules |
Mechanical & Environmental
| Dimensions (W × H × D) | ≈ 570 × 350 × 380 mm (single module) |
| Weight | ≈ 38 kg |
| Ingress Protection | IP65 |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -20°C to +55°C |
| Cooling | Natural convection |
| Installation | Floor‑standing stack with interlocking modules |
Compatibility & Warranty
- Compatible with Fox ESS HV hybrid inverters (H1/H3) and AC chargers (AC1/AC3) designed for ECS series.
- 10‑year battery warranty (registration with Fox ESS typically required to activate full term).
- Designed for residential and light commercial high‑voltage storage applications.
MPN: FE-HV-ECM-4100
Model: Fox ECS4100 4.03kWh High Voltage Battery (Master) V2
Scalable high‑voltage master battery module providing a robust foundation for Fox ECS4100 stacks from 8kWh up to over 28kWh of reliable, long‑life storage.
- Type Solar
- Vendor Fox ESS
- SKU FE-HV-ECM-4100
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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