The Duracell Energy Dura5 HV (model PD-5KWH-400V-1G) is a 5.12 kWh high-voltage LiFePOβ battery module designed exclusively for use with the Dura-i HV three-phase inverter ecosystem. Each module houses a 51.2 V / 100 Ah lithium iron phosphate cell block with an integrated smart BMS, CANBUS communication and self-extinguishing cell chemistry β including an active fire suppression system built into every unit. Modules are fully plug-and-play (all cables and brackets included) and can be installed as a wall-mounted stack of 1 to 16 units per inverter, scaling available storage from 5.12 kWh up to 81.9 kWh per inverter without external control hardware. The Dura5 HV operates in temperatures as low as β10 Β°C without internal heaters, unlike most comparable high-voltage batteries that require heating elements to maintain performance in cold environments. With a rated cycle life of 8,000 full cycles and a 10-year warranty, it is engineered for the long-term performance demands of commercial and high-demand residential three-phase systems.
5.12 kWh
Energy per Module
β10 Β°C
Min. Operating Temp
1β16
Modules per Inverter
β Qualified Installer Required
The Dura5 HV battery must be installed by a suitably qualified electrical engineer with experience in high-voltage DC battery systems, in accordance with BS 7671, the manufacturer's installation manual and any applicable DNO/G99 conditions for the connected inverter. High-voltage DC is present at the battery terminals at all times β do not attempt to install, modify or service this product without appropriate training and personal protective equipment. For technical support contact Duracell Energy: 01386 577845.
π₯ Integrated Fire Suppression
Each Dura5 HV module uses self-extinguishing LiFePOβ cells combined with an active built-in fire suppression system. LiFePOβ chemistry is inherently the most thermally stable of all common lithium cell types, but the addition of dedicated suppression hardware provides an independent layer of protection β critical in commercial settings or where battery stacks are located close to occupied spaces or combustible structures.
π‘οΈ β10 Β°C Operation Without Heating
The Dura5 HV is rated to operate at ambient temperatures as low as β10 Β°C without requiring internal heating elements. Many competing high-voltage battery products need resistive heaters to maintain cell chemistry at sub-zero temperatures β adding parasitic load and a potential failure mode. The Dura5 HV's cell selection eliminates this requirement, making it suitable for unheated plant rooms, outbuildings and external enclosures common in commercial three-phase installations.
π Smart BMS in Every Module
An integrated Battery Management System (BMS) is embedded within each individual Dura5 HV module, not centralised in a separate controller box. This means cell-level data β voltage, temperature, state of charge and fault status β is continuously monitored and communicated via CANBUS directly to the Dura-i HV inverter. The inverter self-adapts its charge curve in real time based on the BMS data, protecting cells from over-charge, over-discharge and excessive thermal stress without manual calibration.
π Plug-and-Play Installation
Every Dura5 HV module ships with all cables, stacking clips and mounting brackets included. Modules connect to each other and to the Dura-i HV inverter using dedicated plug-and-play connectors β no field-fabricated wiring or custom inter-module cabling is required. This substantially reduces installation time and the scope for wiring errors compared to open-terminal or busbar-based systems, while ensuring all high-voltage connections are made with correctly rated, factory-tested conductors.
π Stack or Wall-Mount, 1β16 Modules
Modules measure 509 Γ 687.5 Γ 139 mm (163.5 mm deep with stacking clip attached) and can be installed as a floor-standing stack or wall-mounted depending on available space and site constraints. Connect 1 to 16 modules per Dura-i HV inverter to scale storage between 5.12 kWh and 81.9 kWh per unit, and add further modules retrospectively as needs grow β without replacing the inverter or BMS hardware.
β³ 8,000 Cycles β Long-Term Economics
At a rated 8,000 full charge/discharge cycles, a system cycling once daily has a calendar life exceeding 21 years of cyclic use before reaching end-of-rated-life β well beyond the 10-year warranty period. This longevity underpins the economics of commercial battery storage: the total energy throughput over the battery's life makes the effective cost per kWh dispensed significantly lower than products rated for fewer cycles, even when the upfront module cost is higher.
βΉ Inverter Compatibility β Dura-i HV and Solis Only
The Dura5 HV battery is designed for use with the Duracell Energy Dura-i HV three-phase inverter and is also compatible with Solis three-phase high-voltage inverters. It is not compatible with the standard single-phase Dura-i G3 (which uses the separate 48 V Dura5 battery) or with other third-party inverter brands. Confirm inverter compatibility before ordering. The high-voltage DC bus operates at 380β420 V at system level β verify your inverter's battery voltage range specification against this before connecting.
| Parameter |
Dura5 HV β PD-5KWH-400V-1G |
| Energy |
| Battery module energy (kWh) |
5.12 kWh |
| Usable energy (kWh) |
4.6 kWh |
| Nominal capacity (Ah) |
100 Ah |
| Nominal voltage (V) |
51.2 V |
| Operating voltage range (system bus) |
380β420 V |
| Performance |
| Charge rate |
1C |
| Discharge rate |
1C |
| Rated cycle life |
8,000 cycles |
| Environmental |
| Operating temperature range (Β°C) |
β10 Β°C to +50 Β°C |
| Relative humidity |
5%β95% |
| Ingress protection |
IP65 |
| Max. operating altitude (m) |
3,000 m (derating above 2,000 m) |
| Physical |
| Dimensions (W Γ H Γ D) |
509 Γ 687.5 Γ 139 mm (163.5 mm with stacking clip) |
| Weight |
58 kg Β± 1 kg |
| Cooling method |
Natural convection |
| Installation method |
Stack or wall-mount |
| Scalability |
1β16 modules per Dura-i HV inverter |
| Electronics & Safety |
| Cell technology |
LiFePOβ (lithium iron phosphate) |
| BMS |
Integrated smart BMS per module |
| Communication |
CANBUS |
| Display |
LED indicator |
| Short-circuit protection |
Included |
| Fire detection & suppression |
Yes β auto-extinguishing cells + active suppression |
| Safety certifications |
CE, IEC 62619, UN 38.3, UKCA |
| Inverter compatibility |
Dura-i HV (Duracell Energy) & Solis three-phase HV inverters |
| Warranty |
10 years (Puredrive Energy Ltd, UK) |
βΉ System Scaling β What's Possible with Dura5 HV
A single Dura-i HV inverter supports 1β16 Dura5 HV modules, providing 5.12β81.9 kWh of total storage and 4.6β73.6 kWh of usable capacity per inverter. Up to 30 Dura-i HV inverters can be paralleled in a single system, scaling maximum usable storage to approximately 2.2 MWh β suitable for commercial facilities, large agricultural premises and light-industrial sites. Modules can be added retrospectively without replacing the inverter or existing battery stack, protecting initial investment as storage needs grow. Warranty and support in the UK is provided by Puredrive Energy Limited, Toddington, Gloucestershire GL54 5EB.
Why does the Dura5 HV use LiFePOβ rather than NMC cells?
Lithium iron phosphate (LiFePOβ) is the safest and most thermally stable lithium chemistry commercially available. Unlike nickel manganese cobalt (NMC) cells β which are more energy-dense but release oxygen during thermal runaway β LiFePOβ does not propagate fire in the same way, making it the preferred choice for large commercial battery installations, indoor environments and locations close to occupied spaces. The trade-off is slightly lower energy density, meaning LiFePOβ packs are physically larger per kWh than NMC equivalents. The Dura5 HV's self-extinguishing cell design and integrated fire suppression build on this inherent chemistry advantage with additional active protection layers.
Can the Dura5 HV operate in an unheated outbuilding or outdoor enclosure?
Yes β the Dura5 HV is rated for operation down to β10 Β°C without internal heaters, which is sufficient for most UK external and unheated-building installations. Its IP65 ingress protection guards against dust and water spray. However, if the installation site regularly experiences temperatures below β10 Β°C (highland Scotland, high-altitude sites), performance will derate and the module should not be operated outside its rated range. Always ensure the enclosure provides adequate ventilation for the natural convection cooling to function correctly β do not seal the unit airtight.
How many Dura5 HV modules do I need for my site?
Sizing depends on your daily energy consumption, peak demand, backup duration requirements and solar generation profile. As a rough guide: a 5.12 kWh module (4.6 kWh usable) covers approximately one hour of backup for a site drawing 4β5 kW continuously. For commercial sites, the more useful starting point is calculating your overnight import volume (if using off-peak charging) or your peak demand offset target (if the primary goal is demand charge reduction). We recommend speaking to our technical team or a Duracell Energy-approved installer who can carry out a full energy audit and sizing calculation for your specific site.
Is the Dura5 HV compatible with solar panels installed without a Dura-i HV inverter?
The Dura5 HV cannot operate as a standalone battery β it requires a compatible Dura-i HV inverter or Solis three-phase HV inverter to manage charging, discharging and BMS communication. It cannot be connected directly to solar panels, to a separate charge controller or to a standard string inverter. If you have an existing three-phase solar installation using a compatible Solis inverter, the Dura5 HV can be retrofitted to add battery storage β your installer will need to verify specific Solis model compatibility and firmware version requirements with Duracell Energy before proceeding.
What does the 10-year warranty cover?
The
10-year warranty is provided by
Puredrive Energy Limited (Toddington, Gloucestershire), which manufactures and supports the Dura5 HV in the UK under licence from Duracell. The warranty covers defects in materials and workmanship under normal operating conditions when the battery is installed and maintained in accordance with the manufacturer's instructions. It does not cover damage from incorrect installation, operating outside the rated temperature or voltage range, use with non-compatible inverters, or physical damage. Full warranty terms are available from Duracell Energy at
duracellenergy.com β warranty registration is recommended at time of commissioning.
