
Solax Triple Power Slave 5.8kW Solar Battery
SOLAXSLAVE
Solax Triple Power Slave 5.8kWh Battery – Expandable LiFePO₄ Storage for Scalable Solar Systems
The Solax Triple Power Slave 5.8kWh battery is designed to expand storage capacity when used alongside a Triple Power Master battery. With advanced LiFePO₄ technology and a 90% depth of discharge, it delivers safe, reliable, and long-lasting performance. Suitable for both single and three-phase systems, this plug-and-play unit is ideal for homes looking to scale their solar energy storage.
- Expandable Storage: Add one or more slave units to a master battery system for up to 23kWh of total capacity (3-phase systems).
- Safe LFP Chemistry: LiFePO₄ cells ensure enhanced safety, thermal stability, and environmental friendliness.
- High Performance: 90% depth of discharge and over 6000 charge cycles for long-term reliability.
- Flexible Installation: Wall or floor mountable with supplied cables for fast plug-and-play setup.
- IP55 Protection: Suitable for various environments with resistance to dust and water ingress.
Technical Specification
- Battery Type: Li-ion (LFP)
- Total Capacity: 5.8kWh
- Nominal Voltage: 115.2V
- Operating Voltage: 100–131V
- Depth of Discharge: 90%
- Charge Efficiency: 99% (Faradic)
- Roundtrip Efficiency: 95%
- IP Rating: IP55
- Communication: RS485 (Battery-to-BMS)
- Warranty: 10 years
✅ Expand your storage with the Solax Triple Power Slave 5.8kWh – the safe, scalable battery solution for smart solar energy systems!

Kw Rating | 5.8 kW |
Product | Battery |
Type | Slave |
Width | 193 mm |
Depth | 708 mm |
Nominal Power Output | 5.8 kW |
Height | 474 mm |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.