The Duracell Energy Dura-i HV is a three-phase high-voltage hybrid inverter engineered for commercial properties, high-demand homes and light-industrial energy storage systems. Available in five power outputs — 8 kW, 15 kW, 30 kW, 40 kW and 50 kW — the range scales from single-inverter residential installs right through to multi-unit commercial arrays delivering up to 2.4 MWh of total storage when combined with Dura5 HV batteries. Every model is built into a die-cast aluminium enclosure, supports both solar PV input and grid charging, delivers emergency backup power with a sub-10 ms transfer time, and connects to the Duracell Energy cloud for intelligent tariff-based charge/discharge scheduling. All models carry a 10-year manufacturer's warranty, backed and supported in the UK by Puredrive Energy in Toddington, Gloucestershire.
Up to 80 kWp
Max PV Array
Up to 98.4%
Peak Efficiency
Dura5 HV
Battery Compatible
⚠ Qualified Installer RequiredThe Dura-i HV must be installed by a
suitably qualified electrical engineer familiar with three-phase grid-tied inverter systems, in accordance with
BS 7671,
G98/G99 regulations and the manufacturer's installation manual. A
G99 application must be submitted to your DNO prior to commissioning. For technical support contact Duracell Energy on
01386 577845 or
sales.uk@duracellenergy.com.
⚡ Fanless Natural Convection (8–30 kW)
The 8 kW–30 kW models dissipate heat entirely through natural convection — no moving parts means lower acoustic output, zero fan-failure risk and reduced maintenance. The HV40 and HV50 add smart fan cooling to manage the greater thermal load at peak output, rated at 55 dB(A) and 60 dB(A) respectively.
🔋 High-Voltage Battery Architecture
The HV system uses a 100–800 V battery bus (150–600 V on HV8), compatible exclusively with the Dura5 HV LiFePO4 battery. High-voltage DC minimises conductor losses and allows up to 16 battery modules per inverter for up to 80 kWh per unit, scalable without additional conversion stages.
☀️ Generous PV Oversize Allowance
The HV8 supports up to 150% PV oversize relative to inverter rating; the 15–50 kW models support up to 100% oversize. Broad MPPT voltage windows of 150–950 V accommodate long string runs and diverse panel combinations, reducing DC cabling cost on large commercial rooftops.
🔄 Parallel Scaling Up to 30 Units
Multiple Dura-i HV inverters can be paralleled in Primary–Secondary mode for a coordinated system. Up to 30 inverters running together with 16 batteries each delivers a theoretical 2.4 MWh of storage — suitable for commercial facilities, large farms or light industrial sites requiring reliable peak-shaving or backup.
💡 Sub-10 ms Emergency Backup
All HV models switch to off-grid backup mode in under 10 milliseconds, seamlessly below the threshold at which most sensitive equipment notices a supply interruption. Peak backup capacity reaches up to 70,000 W for 10 seconds on the HV50 — sufficient to start large motor loads during a grid outage.
📊 Tariff Intelligence & Cloud EMS
Integrated WLAN, RS485 and dual CAN communication connects the Dura-i HV to the Duracell Energy cloud. The built-in AI-driven Energy Management System optimises charge and discharge schedules against real-time tariff data — including dynamic business tariffs — to minimise electricity costs automatically without manual intervention.
ℹ Physical Dimensions — HV8 vs HV15–HV50
The Durai-HV8 (PD-DH3P-8K-G1) uses a smaller enclosure (450 × 550 × 185 mm, 31 kg, IP65) from the 5–10 kW family. The HV15 through HV50 share a larger die-cast enclosure (615 × 465 × 255 mm, IP66), offer three MPPT inputs instead of two, and support a wider battery voltage range of 100–800 V. If your project is at the boundary between HV8 and HV15, check mounting provisions carefully.
| Parameter |
HV8
PD-DH3P-8K-G1
|
HV15
PD-DH3P-15K-G1
|
HV30
PD-DH3P-30K-G1
|
HV40
PD-DH3P-40K-G1
|
HV50
PD-DH3P-50K-G1
|
| PV Input |
| Max. recommended PV (Wp) |
12,000 |
30,000 |
60,000 |
60,000 |
60,000 |
| Max. PV input voltage (V) |
1,000 V |
| MPPT voltage range (V) |
150–950 V |
| No. of MPPT / strings per MPPT |
2 (1/2) |
3 (2/1/1) |
3 (2/2/2) |
3 (2/2/2) |
3 (2/2/2) |
| Max. PV input current (A) |
48 A |
64 A |
96 A |
96 A |
96 A |
| Battery |
| Battery type |
LiFePO₄ (Dura5 HV) |
| Battery voltage range (V) |
150–600 V |
100–800 V |
| Max. charge/discharge current (A) |
30 / 30 A |
50 / 50 A |
65 / 65 A |
65 / 65 A |
65 / 65 A |
| Max. charge/discharge power (W) |
10,600 / 10,600 |
20,000 / 15,000 |
26,000 / 26,000 |
26,000 / 26,000 |
26,000 / 26,000 |
| AC Output (Grid) |
| Rated AC output power (VA) |
8,000 |
15,000 |
30,000 |
40,000 |
50,000 |
| Max. AC output current (A) |
13.3 A |
22.8 A |
45.5 A |
60.6 A |
75.8 A |
| Rated AC voltage |
3/N/PE — 220/380 V · 230/400 V · 240/415 V |
| Rated frequency (Hz) |
50 / 60 Hz |
| THDi (rated power) |
<3% |
| Backup Output |
| Rated backup power (off-grid) |
8,000 W |
15,000 W |
30,000 W |
40,000 W |
50,000 W |
| Peak backup (10 s) |
12,000 VA |
25,500 VA |
45,000 VA |
60,000 VA |
70,000 VA |
| Transfer time |
<10 ms |
| Efficiency |
| Max. efficiency |
98.40% |
98.10% |
98.20% |
98.20% |
98.20% |
| European efficiency |
97.90% |
97.60% |
97.80% |
97.80% |
97.90% |
| General |
| Ingress protection |
IP65 |
IP66 |
| Enclosure dimensions (W × H × D) |
450 × 550 × 185 mm |
615 × 465 × 255 mm |
| Weight |
31 kg |
36.5 kg |
39.5 kg |
39.8 kg |
— |
| Cooling method |
Natural convection |
Natural convection |
Natural convection |
Fan cooling |
Fan cooling |
| Noise (typical) |
— |
35 dB(A) |
35 dB(A) |
55 dB(A) |
60 dB(A) |
| Operating temperature (°C) |
−25 °C to +60 °C (derating above 45 °C on HV8) |
| Max. operating altitude (m) |
4,000 m |
2,000 m |
| Communication |
RS485 / 2×CAN / WLAN |
2×RS485 / 2×CAN / WLAN |
| Surge protection |
Type II DC and AC |
| Topology |
Transformerless |
| Display |
LED |
| Warranty |
10 years (Puredrive Energy Ltd, UK) |
ℹ Warranty & UK Support
All Dura-i HV inverters are manufactured under licence and warranty supported by Puredrive Energy Limited, Toddington, Gloucestershire, GL54 5EB. Duracell is a registered trademark of Duracell Batteries BV and Duracell U.S. Operations, Inc., used under licence.
UK technical support: 01386 577845
What is the difference between the HV8 and HV15–HV50 models?
The HV8 (8 kW) belongs to the compact 5–10 kW family: it has two MPPT inputs, fits a smaller 450 × 550 × 185 mm enclosure, carries an IP65 rating and operates with a battery voltage range of 150–600 V. The HV15 through HV50 share a larger 615 × 465 × 255 mm die-cast housing rated IP66, have three MPPT inputs with up to six string inputs in total, accept a broader 100–800 V battery range, and deliver higher AC outputs suitable for commercial premises. Internally the architectures are the same — high-voltage LiFePO₄ battery bus, transformerless topology and Dura5 HV battery compatibility throughout.
Which battery must I use with the Dura-i HV range?
The Dura-i HV inverters are designed exclusively for the Duracell Energy Dura5 HV battery (model PD-5KWH-400V-1G), a 5.12 kWh / 51.2 V LiFePO₄ module that stacks to a nominal 380–420 V bus. You can connect 1 to 16 Dura5 HV modules per inverter, providing between 5.12 kWh and 81.9 kWh of storage per inverter unit. Compatibility with other battery brands is not supported; misuse may void the warranty.
Does the Dura-i HV work without solar panels?
Yes. The Dura-i HV can charge the connected Dura5 HV batteries directly from the grid and manage discharge to offset peak import costs — no solar PV installation is required. This is particularly valuable for businesses on dynamic or time-of-use tariffs. When solar PV is added later, the inverter accepts up to 1,000 V DC string input across its MPPT channels without any hardware change, making retrofit straightforward.
How many Dura-i HV inverters can be connected in parallel?
Up to 30 Dura-i HV inverters can be paralleled in Primary–Secondary mode. With 16 Dura5 HV batteries per inverter, a 30-unit array provides a theoretical maximum of 2.4 MWh of usable energy storage. Paralleling is configured via the communication bus; detailed wiring and commissioning guidance is provided in the Parallel Guide available from Duracell Energy.
Will the HV40 or HV50 make more noise than the smaller models?
Yes. The HV15 and HV30 use passive natural convection and produce a typical noise level of around 35 dB(A) — comparable to a quiet library. The HV40 steps up to 55 dB(A) and the HV50 to 60 dB(A) due to the active fan cooling required at those power levels. If the inverter is to be installed in or close to an occupied space (office, bedroom wall, etc.), the HV8–HV30 models are better suited; the HV40/50 are designed for plant rooms, meter cupboards or outdoor enclosures where noise is less critical.
Is a G99 application required for the Dura-i HV?
Yes — because all Dura-i HV models deliver more than 3.68 kW of AC output, a formal G99 application to your Distribution Network Operator (DNO) is mandatory before commissioning any model in this range. DNO approval timescales typically run from 4 to 8 weeks, though this varies by network area. Your installer should submit the application early in the project to avoid commissioning delays. Duracell Energy's technical team can advise on documentation requirements.
