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7.40 kWh 51.2V LiFePO4 (LFP) StorageDOCK Battery

The Storagedock ES7.4K is a high-capacity 51.2V LiFePO4 battery designed for professional-grade energy storage in demanding residential and commercial environments. Offering 7.40kWh of total energy, this unit features bolted Grade A Prismatic cells and a 10-year warranty, providing a powerful and scalable solution for 48V systems.

Retail price: R26,635.16 excl. VAT

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Robust High-Capacity Energy Storage

The Storagedock ES7.4K (51.2V / 144Ah) is engineered for maximum reliability and power density. Built with bolted Grade A LiFePO4 Prismatic cells clamped at 5000N and protected by MICA-based dividers, this battery is designed for extreme durability and thermal stability. With 5.92kWh of usable energy at 80% Depth of Discharge and a rating of 4,000 cycles, it is an ideal choice for high-demand off-grid and backup applications.

Intelligent Monitoring & System Control

Equipped with a 3-page color touch screen, the ES7.4K provides instant on-site access to critical performance metrics. For advanced management, the battery includes a Bluetooth interface for mobile app connectivity (Android and iOS) and CAN-bus communication specifically designed for Victron Energy GX devices. The system continuously records historic parameters and features integrated SOC and SOH communications for precise battery bank management.

Advanced Safety & Industrial Scalability

The ES7.4K features a high-output 150A BMS and an integrated 125A circuit breaker with trip function. To ensure long-term cell health, a 3A active cell balancer works continuously to maintain voltage equilibrium across the pack. For larger infrastructure needs, up to 8 units can be connected in parallel, creating an expansive 59.2kWh energy storage system. The unit is housed in a rugged polymer-coated steel shell with a galvanized steel internal cell pack, suitable for wall or floor mounting.

Key Product Specifications

  • Battery Type: Grade A LiFePO4 Prismatic Cells (Bolted)
  • Nominal Voltage: 51.2 VDC
  • Total Energy Capacity: 7.40 kWh (144 Ah)
  • Usable Energy: 5.92 kWh (@ 80% DoD)
  • User Interface: 3-Page Color Touch Screen & Bluetooth App
  • Communication: CAN-bus (Victron Interface)
  • Protection: 125A Circuit Breaker (with trip) & 150A BMS
  • Recommended Inverter: 6kVA
  • Scalability: Parallel up to 8 Units
  • Warranty: 10 Years / 4000 Cycles @ 80% DoD
Technical Specifications ES7.4K – 51.2V
Product code ES7.4K
Battery type Grade A LiFePO₄ prismatic cells, bolted
Number of internal modules 1
Nominal voltage 51.2 V
Nominal Ah 144 Ah
Total energy capacity 7.40 kWh
Available energy @ 80% DOD 5.92 kWh
Recommended charge current 0.5C
Maximum charge current 100 A
Bulk / Absorption charge voltage 56.2 VDC
Float voltage 56.2 VDC
Sync voltage Over ruled by BMS ± 55.2 VDC
Recommended discharge current 0.5C
Maximum discharge current 125 A
Protection: Circuit breaker type 125 A with trip
BMS ampere & number 150 A × 1
Recommended inverter size 6 kVA
Maximum parallel of units 8
Parallel ampere per unit: Discharge 125A / 250A / 325A / 400A / 400A / 400A / 400A / 400A
Parallel ampere per unit: Charge 100A / 200A / 250A / 300A / 300A / 300A / 300A / 300A
CAN-bus communication Yes
Recommended operating temp: Charge 5° – 45°C
Recommended operating temp: Discharge 0° – 50°C
Warranty period 10 Years / 4000 cycles @ 80% DOD
Nett weight 60.4 kg
Dimensions (h x w x d) 670 mm x 495 mm x 180 mm
Recommended cable size 50 mm²
Installation type Indoors – Wall / floor
Ventilation distance 200 mm
Installation conditions Dry. Clean. Regulated temperature
Enclosure Galvanized steel cell pack. Polymer coated steel shell
User interface 3 “page” colour touch screen
Essential accessories Storagedock 125A cable kit

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