Sunsynk 20.48kWh HV Battery System High-capacity: 20.48kWh storage from 4 modular 5.12kWh HV lithium batteries in Battery Cabinet with Door — ideal for homes, business and backup Robust, reliable construction with advanced BMS for safety, longevity and seamless integration with Sunsynk inverters Scalable, secure battery cabinet system for easy installation — designed for demanding UK and commercial settings Description The Sunsynk 20.48kWh High Voltage Battery System provides a complete energy storage solution combining four 5.12kWh HV Battery Modules (G20), a dedicated HV BMS, and a secure battery cabinet. This modular system is optimised for larger residential, SME, public sector, and backup applications in the UK. Featuring advanced lithium ferro-phosphate chemistry for extended cycle life and safety, it delivers reliable power, rapid installation and efficient operation alongside Sunsynk hybrid and off-grid inverters. Key Features Total usable energy: 20.48kWh system (4×5.12kWh HV modules) High-voltage design: Max 1C charge/discharge rate (up to 20.48kW), suitable for dynamic loads and fast backup Advanced BMS: Full protection, real-time monitoring, compatible with Sunsynk and other leading inverters Modular battery rack: Secure cabinet with door, keeping cells safe and installation neat Long cycle life and safety with premium LFP cells and full UK certifications Technical Specifications Battery Chemistry Lithium Ferro-Phosphate (LiFePO4) Number of Modules 4 × Sunsynk 5.12kWh Battery (G20) Module Rated Energy 5.12kWh Total System Energy 20.48kWh Nominal Module Voltage 204.8V Operating Voltage Range 164.4-233.6V Module Capacity 100Ah Nominal Charge/Discharge Rate 100A Cycle Life 6000+ cycles at 80% DoD IP Rating IP20 (cabinet/rack) Warranty 10 years Certifications IEC62619, UN38.3, EN/IEC 61000-6 Operating Temperature (Charge) 0–55°C Operating Temperature (Discharge) -20–55°C Weight (per module) Approx. 44kg Cabinet Weight Range 44–85kg (varies with battery count/type) Total System Weight (4 modules + rack) Approx. 220kg Dimensions (per module) TBA — please contact for up-to-date rack/cabinet sizing Relative Humidity Range 5–85% RH Altitude Limit ≤2000m Enclosure Type Floor/rack mount, secure metal cabinet with door Communications CAN, RS485 Protection Features Over/under-voltage, short-circuit, thermal, cell/pack balancing (managed by BMS) Applications Residential and SME energy storage for hybrid, solar and off-grid systems Commercial and public sector backup (schools, estates, care facilities) Demand management, critical infrastructure and scalable multi-rack deployments Shipping & Support Delivery available UK-wide, Ireland, Africa, the Caribbean and worldwide. If shipping rates are not shown at checkout, please ring +44 2080640335 or [email protected] for a quote. UK expert support is available – contact us by phone, email, live chat, or visit our London office for advice. We recommend installation by a trusted Sunsynk partner or certified electrician.
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