Sunsynk 20.48kWh High-Voltage Battery System (Complete Package)
The Sunsynk 20.48 kWh HV Battery System (part number SUN-HV-20.48) is a complete high-voltage energy storage package comprising 4 x Sunsynk HV 5.12 kWh battery modules, 1 x Sunsynk HV BMS, and 1 x battery cabinet with door. This is a ready-to-install package providing 20.48 kWh of total storage at 100% depth of discharge, with peak discharge capability of 1C (100 A) per module. The system requires a compatible Sunsynk hybrid inverter (sold separately). Total package weight: 279 kg. Available from DECO Group, a UK-based solar and energy storage wholesaler for professional trade installers.
Package Contents
- 4 x Sunsynk 5.12 kWh Single Battery Unit for HV Series (SUN-HV-5.12-BATT)
- 1 x Sunsynk BMS for HV Series (SUN-HV-BMS)
- 1 x Battery Cabinet with Door for 20.48 kWh HV System (SUN-HV-20.48-BATTRACK-DOOR)
System Specifications
- Total nominal capacity: 20,480 Wh (20.48 kWh)
- Battery chemistry: Lithium iron phosphate (LiFePO₄)
- Depth of discharge: 100%
- Module nominal voltage: 51.2 V each
- Peak discharge current per module: 100 A (1C)
- BMS manages up to 12 modules (expandable beyond this package)
- Communication: CAN / RS485
- Cycle life: over 6,000 cycles
- Total package weight: 279 kg
Component Weights
- Battery modules: 4 x 44 kg = 176 kg
- BMS: 19 kg
- Cabinet with door: 84 kg
- Total: 279 kg
Cabinet Specifications
- Capacity: 4 x 5.12 kWh battery modules + 1 x BMS
- Dimensions: 589 x 590 x 1,040 mm
- Lockable front-access door
- Optimised ventilation
Key Features
- Complete ready-to-install 20.48 kWh HV storage system
- All required components included: batteries, BMS, and cabinet
- 100% depth of discharge for maximum usable energy
- LiFePO₄ chemistry with over 6,000 cycle life
- BMS supports up to 12 modules — system can be expanded by adding individual battery modules (up to 8 more)
- Lockable cabinet with optimised ventilation
- 10-year manufacturer warranty on batteries
System Compatibility
- Compatible with Sunsynk hybrid inverters (sold separately)
- Inverter not included in this package
- The BMS in this package supports up to 12 battery modules; additional SUN-HV-5.12-BATT modules can be added individually (up to 8 more) but will require the larger rack (SUN-HV-61.44-BATTRACK-DOOR) if exceeding 4 modules
Installation Notes
- Total package weight: 279 kg. Individual components must be lifted separately
- Cabinet: 84 kg (empty) — two-person lift or mechanical assistance required
- Battery modules: 44 kg each — two-person lift required per module
- BMS: 19 kg
- Must be installed by a qualified electrician or technician
Warranty
- Battery modules: 10-year manufacturer warranty
Common Questions
Click a question below to reveal the answer.
Is an inverter included in this package?
No. This package includes battery modules, BMS, and cabinet only. A compatible Sunsynk hybrid inverter must be ordered separately.
Can I expand this system later?
Yes. The included BMS supports up to 12 battery modules. Additional SUN-HV-5.12-BATT modules can be added individually. However, if expanding beyond 4 modules, the larger 61.44 kWh rack (SUN-HV-61.44-BATTRACK-DOOR) will be needed as the 20.48 kWh cabinet only houses 4 modules + BMS.
What is the difference between the 20.48kWh and 61.44kWh systems?
The 20.48 kWh system (SUN-HV-20.48) includes 4 battery modules in a compact cabinet (589 x 590 x 1,040 mm, 279 kg total). The 61.44 kWh system (SUN-HV-61.44) includes 12 battery modules in a full-height rack (2,240 x 589 x 590 mm, approximately 628 kg loaded). Both use the same HV battery modules and BMS.
DECO Group supplies Sunsynk HV battery systems in both 20.48 kWh and 61.44 kWh configurations alongside individual battery modules, BMS units, cabinets, and compatible hybrid inverters. Visit decogroup.co.uk for the full catalogue.
About DECO Group
We supply battery storage systems, inverters, and installation accessories to professional installers across the UK. Visit decogroup.co.uk.
