North Sea Single-phase Hybrid Inverters

3.6 kW, 5 kW & 6 kW inverters designed for sodium-ion battery systems

Purpose-built for sodium-ion batteries, Eleven Energy’s North Sea hybrid inverter range delivers efficient solar conversion and intelligent energy optimisation for your home. Designed for new PV installations and AC-coupled retrofit projects, it helps households get more from their solar generation and battery storage.

Eleven Energy North Sea Hybrid Inverter

Key Features

The North Sea single-phase hybrid inverter range is designed to deliver smarter home energy management for both new solar installations and retrofit projects. Available in 3.6 kW, 5 kW and 6 kW models, it combines high-efficiency power conversion, intelligent energy optimisation and installer-friendly commissioning in a compact, reliable system.

With an IP65-rated design, support for AC-coupled installations and dedicated emergency power supply (EPS) capability, the inverter is built for flexible, future-ready home energy systems. Its smart optimisation features help households make better use of solar generation, reduce reliance on the grid and maximise savings on energy bills.

  • Smart Energy Management Platform
    Monitor, control and optimise solar, battery and home energy usage from one intelligent platform.

  • Fast & Intelligent Commissioning
    A streamlined commissioning process helps installers complete setup quickly and confidently.

  • Optimised Solar Yield
    Advanced algorithms use solar forecasting and intelligent export control to help maximise the value of every kilowatt generated.

  • Third-party Device Integration
    Integrated monitoring for compatible devices such as EV chargers and heat pumps enables a more connected home energy ecosystem.

  • Smart Immersion Heater Control
    Automatically manages immersion heater usage based on available surplus solar energy.

  • AC-couple Retrofit Ready
    Supports AC-coupled retrofit installations, making it easier to add battery storage to existing PV systems.

  • Real-time & Historical Monitoring
    Provides easy access to live and historical data covering energy production, household consumption and battery storage.

  • Remote Control of Key Settings
    Allows remote adjustment of charging schedules, discharging schedules and export power limits.

  • EV Battery Protection Logic
    Prevents the home battery from unnecessarily discharging into an EV, helping preserve stored energy for household use.

  • UK-based Secure Cloud
    Energy data is hosted securely in the UK, supporting reliable access and peace of mind.

  • Agile Octopus Compatible
    Compatible with Agile Octopus tariffs, enabling smart charging and discharging around dynamic electricity pricing.

  • Home Assistant Compatible
    Designed to integrate with Home Assistant for advanced smart home energy automation.

Technical Specifications

Input Parameter (PV)

EL3600EL5000EL6000
Max. DC Input Power7.2 kWp8 kWp9 kWp
Starting Voltage95 V
Max. Input Voltage600 V
MPPT Voltage Range80-550 V
Number of MPPT2
Input String Per MPPT1
Nominal Input Voltage360 V
MPPT Max. Input Current18 A / 18 A
PV Max. Efficiency97.5%98.0%98.0%

On-grid Parameter (AC)

EL3600EL5000EL6000
Nominal Output Power3.6 kW5 kW6 kW
Max. Output Current16.4 A22.7 A27.2 A
Nominal Grid Voltage230 V
Max. Input Current from Grid22.7 A27.2 A27.2 A
Grid Voltage Range184 – 276 V
Frequency Range45 – 65 Hz

Backup Terminal (AC)

EL3600EL5000EL6000
Nominal Output Power3.6 kW5 kW6 kW
Nominal Voltage230 V
Nominal Frequency50 Hz
Nominal Output Current16.4 A22.7 A27.2 A
Output THDu (@Linear Load)<2%

Battery (DC)

EL3600EL5000EL6000
Nominal Battery Voltage45 V
Battery Voltage Range33 – 59.5 V
Max. Charging Voltage60 V
Max. Continuous Charging / Discharging Current85 A100 A100 A
Battery Charging / Discharging Efficiency95.2%

General Data

EL3600EL5000EL6000
Standby Power Loss≤10W
Dimension (W x H x D)500 x 470 x 180 mm
Weight23 kg
Noise Emission< 25 dB
Operating Temperature Range-25℃ ~ 60℃
Cooling MethodNatural Cooling
IP RatingIP65
CommunicationRS485 / CAN / Parallel ports

Certificates & Approvals

EL3600EL5000EL6000
CE-LVDIEC 62109-1, IEC 62109-2, EN 62109-1, EN 62109-2 , IEC 62477-1
CE-EMCEN61000-6-1, EN61000-6-2, EN61000-6-3, EN61000-6-4, EN 62920
GridG98G99, G100G99, G100

Protection Mechanisms

DC Switch (EN 60497-3)AC Overvoltage Protection: Level 3
PV Insulation Resistance DetectionBattery and PV Overvoltage: Level 2
Residual Current MonitoringDC Surge Protection: Type 2
Anti-islanding ProtectionLightning Protection
AC Short Circuit ProtectionReverse Polarity Protection (PV & Battery)
Overvoltage and Overload Protection

Document Downloads

Official Distributor

Midsummer Energy is our UK distributor and strategic partner in bringing our sodium batteries to market.

Midsummer Energy

Website: https://midsummerwholesale.co.uk/
Phone: +44 (0)1223 851 535
Address: Midsummer,Cambridge Road Industrial Estate,Milton CB24 6AZ

Client Testimonials

Trusted by Installers. Loved by Homeowners. Hear from our satisfied customers.

We couldn’t be happier with the Eleven Energy inverter and battery system and the support the company has provided.

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Adam R.
6 kW North Sea Inverter + 18 kWh Volta Sodium-ion Battery

“I can highly recommend the Eleven sodium battery for its performance and reliability”

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Simon B.
3.6 kW Inverter + 4.5 kWh Volta Sodium-ion Battery

“The products are very smart, easy to install, and probably the simplest on the market to commission”

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Mike H.
6kW Inverter + 9 kWh Volta Sodium-ion Battery

“From an installer’s point of view, it’s clear that usability and reliability were top priorities in the system design”

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Adrian B.
6 kW Inverter + 13.5 kWh Volta Sodium-ion Battery

“We’re new to solar so have appreciated having such a responsive team at Eleven Energy whenever we’ve had questions. We’d not hesitate to recommend them!”

Read more

Kathleen W.
6 kW Inverter + 9 kWh Volta Sodium-ion Battery