3.6 kW AC OutputG98 — Notification Only10 kWp Solar Input97.3% Peak Efficiency2 MPPT 70–540VDura5 Compatible10ms BackupIP6510-Year Warranty
The Duracell Energy Dura-i G3 3.6 kW (model PD-DH1P-3.6K-G3) is a single-phase hybrid solar inverter designed for UK homes with existing or planned solar PV systems up to 10 kWp, combined with Dura5 battery storage. At 3.6 kW rated AC output, it falls within the G98 notification threshold — meaning installation requires only a DNO notification rather than a full G99 application, significantly simplifying the approval process. It converts solar DC to household AC at 97.3% peak efficiency, charges and discharges the Dura5 LiFePO4 battery at up to 75A / 4,000W, switches to emergency backup power in 10ms during outages, and integrates fully with the Duracell Energy app for intelligent energy management.
3.6 kW
AC Output
97.3%
Peak Efficiency
10 kWp
Max PV Input
10ms
Backup Transfer
G98
No Application
10 yr
Warranty
✅ G98 Eligible: At 3.6 kW, this model falls below the 3.68 kW G98 threshold. Installation requires only a DNO notification — no formal G99 application or approval period needed. This can save several weeks on the installation timeline compared to higher-output models.
Dura-i G3 Range — at a Glance
Size
AC Output
Max AC
Bat Charge/Discharge
Bat Current
Max AC Out (A)
Cooling
3.6 kW ✓
3,600W
3,960W
4,000W / 4,000W
75A / 75A
18A
Natural
4.6 kW
4,600W
4,600W
5,500W / 5,500W
110A / 110A
21A
Natural
5.0 kW
5,000W
5,500W
5,500W / 5,500W
110A / 110A
25A
Natural
6.0 kW
6,000W
6,600W
6,600W / 6,600W
135A / 135A
28.7A
Smart fan
This listing is for the highlighted row. All models share the same PV input, MPPT, physical dimensions and certifications.
Key Features & Technology
97.3% Peak Efficiency PV-to-AC
Peak conversion efficiency of 97.3% (PV to AC) and 96.8% European weighted efficiency — among the highest in the hybrid inverter class. Higher efficiency means more of your solar generation reaches your home appliances and battery, reducing the amount lost as heat in the inverter itself.
10 kWp Solar Capacity — 2 MPPT Inputs
Accepts up to 10 kWp of connected solar PV across two independent MPPT trackers (up to 5,000 W per MPPT), each handling one string. Dual MPPT allows panels on different roof aspects or angles to be tracked independently, so shading or orientation differences on one string don't drag down the other.
Wide MPPT Range 70–540V — Starts Earlier, Runs Later
The MPPT operating voltage range of 70V to 540V (with start voltage of just 90V) means the inverter begins harvesting solar energy at lower irradiance levels — earlier in the morning and later in the evening — and continues operating in cloudy, overcast and low-sun winter conditions when narrower-range inverters have already shut down.
10ms Emergency Power Supply — Seamless Backup
In the event of a grid outage, the Dura-i switches to backup power in just 10ms (typical) — fast enough to be imperceptible to most home appliances, including computers and sensitive electronics. The backup output matches nominal grid parameters (230V / 50Hz) and supports the full rated inverter output, enabling the home to run normally from battery storage during outages.
Optimised for the Dura5 LiFePO4 battery, the Dura-i charges and discharges the battery 20% faster than other hybrid inverters, maximising the benefit of the Dura5's 1C rating. The lithium charge curve is self-adaptive via the BMS communication link (CAN/RS485), ensuring optimal charging at every state of charge without manual configuration.
Integrated Smart Meter — No External Energy Meter Needed
A built-in energy meter measures import, export and self-consumption directly — eliminating the need for a separate external remote energy meter (REM). This reduces installation cost, wiring complexity and potential points of failure, while still providing full energy monitoring data through the Duracell Energy app.
Modular — Up to 9 Inverters in Parallel
Multiple Dura-i units can be connected in parallel (up to 9 inverters), enabling system scaling for larger homes, commercial premises or properties with high energy demand. Each inverter contributes its rated AC output and battery capacity, creating a modular, upgradeable system without replacing existing equipment.
Solar Panel Optimiser Compatible
The Dura-i is compatible with market-leading solar panel optimisers (such as SolarEdge Power Optimisers and Tigo). Optimisers enable per-panel MPPT tracking, which is essential for installations where individual panels experience partial shading from chimneys, dormers, trees or roof obstructions — recovering generation that would otherwise be lost.
IP65 — Indoor and Outdoor Installation
IP65 ingress protection means the Dura-i can be installed outside on an exterior wall as well as indoors. The operating temperature range of -25°C to +60°C covers UK conditions in all seasons, and the wall-bracket mounting system keeps installation clean and straightforward.
G98 & G99 Certified — DNO Compliant
The Dura-i holds both G98 and G99 grid connection certifications, covering installations below and above 3.68 kW respectively. The 3.6 kW model qualifies for G98 (notification only — no full application required), simplifying and accelerating installation approval with the Distribution Network Operator.
10-Year Warranty
10-year product warranty supported by Puredrive Energy Ltd in Toddington, Gloucestershire, UK — providing domestic warranty support without international logistics delays.
Puredrive Energy Ltd, Toddington, Gloucestershire, UK
ℹ Installation Note: The Dura-i must be installed by a suitably qualified electrician in accordance with BS 7671, MCS (where applicable) and the manufacturer's installation instructions. A G98 notification or G99 application must be submitted to your DNO before commissioning. For technical support contact Duracell Energy on 01386 577845 or sales.uk@duracellenergy.com.
Frequently Asked Questions
What does a hybrid inverter do that a standard solar inverter doesn't?
A standard solar (string) inverter converts DC from solar panels to AC for the home but cannot communicate with or manage a battery. A hybrid inverter adds a second DC port for a battery, along with the BMS communication link, charge/discharge control and grid/battery arbitrage logic. This means one unit manages solar generation, battery charging, grid import/export and backup power — replacing what would otherwise require two separate inverters.
Do I need solar panels to use the Dura-i?
No. The Dura-i can operate as a battery inverter only — without any solar panels connected — charging the Dura5 battery from the grid during cheap off-peak hours and discharging during expensive peak periods. Because the Dura-i is a hybrid inverter, solar panels can be added to the system at any point in the future without replacing the inverter.
What is the difference between G98 and G99?
G98 and G99 are UK grid connection standards. G98 applies to export-capable inverters up to 3.68 kW — installation requires notification to the DNO but no formal application or approval. G99 applies to systems above 3.68 kW — a formal application to the DNO is required, which can add several weeks to the installation timeline. The 3.6 kW Dura-i falls under G98 (notification only), while the 4.6 kW, 5 kW and 6 kW models require a G99 application.
How many Dura5 batteries can I connect to one Dura-i?
The Dura-i communicates with the Dura5 BMS and manages the battery bank as a single entity. The number of Dura5 units that can be connected is determined by the inverter's maximum charge/discharge current and the total battery capacity — your installer will calculate the optimal configuration. Up to 32 Dura5 modules can operate in a parallel battery bank; multiple Dura-i units (up to 9 in parallel) can be used to increase both AC output and battery throughput for larger systems.
Can the Dura-i run the home during a power cut?
Yes. The Dura-i has an Emergency Power Supply (EPS / backup) output that activates within 10ms of a grid outage — fast enough that most appliances continue running uninterrupted. The backup output delivers 230V / 50Hz at the full rated power of the inverter, sourced from the connected Dura5 battery. The home will continue operating from battery storage until the battery is depleted or the grid is restored.
Related Products
Dura-i G3 4.6 kW
PD-DH1P-4.6K-G3 — next size up
Duracell Dura5 5.12 kWh Battery
LiFePO4 storage module — pairs with Dura-i
DuraCharger 7kW EV Charger
Complete the Duracell Energy ecosystem
TypeHybrid Inverter
VendorDuracell Energy
SKUPD-DH1P-3.6K-G1
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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