Fox ESS DDSU666 Single Phase Smart Meter with 100A CT

Accurate Energy Monitoring for Fox ESS Single-Phase Systems

The Fox ESS DDSU666 Single Phase Smart Meter is a compact and highly accurate energy monitoring solution designed for use with Fox ESS single-phase hybrid inverters and AC-coupled systems.

Providing precise import and export energy measurements, the DDSU666 enables intelligent energy management, helping optimise self-consumption, improve battery charging strategies, and maximise the performance of your solar PV system.

Ideal for installations where the inverter is located more than 30 metres from the incoming supply, the DDSU666 offers reliable communication and accurate monitoring through a simple DIN-rail mounted design.

Available from Solar Renewable Hub with nationwide delivery and dedicated technical support.

Key Features

• Designed for Fox ESS Single-Phase Systems
• Accurate Import & Export Energy Monitoring
• Supplied with External 100A Current Transformer (CT)
• RS485 Communication
• Compact DIN Rail Mounting Design
• Real-Time LCD Display
• Low Power Consumption
• Essential for Longer Cable Run Installations
• Class 1 Accuracy Metering

Improve System Performance

The DDSU666 allows your Fox ESS inverter to accurately monitor household energy consumption and grid interaction, enabling advanced energy management functions such as:

• Self-consumption optimisation
• Battery charging control
• Export limitation
• Import/export monitoring
• Smart energy management
• Enhanced system efficiency

Ideal for Long Distance Installations

Where the inverter is installed more than 30 metres from the property's incoming electrical supply, Fox ESS recommends using a DDSU666 Smart Meter in place of the standard CT clamp.

Benefits

• Improved measurement accuracy
• Reliable communication over longer distances
• Enhanced system performance
• Reduced monitoring errors
• Ideal for detached garages, outbuildings, and commercial installations

Accurate Energy Monitoring

The DDSU666 delivers highly accurate measurements for both imported and exported electricity.

Measurement Accuracy

• Voltage Accuracy: ±0.5%
• Power Accuracy: ±1%
• Class 1 Metering Accuracy

This ensures precise energy data for monitoring, battery control, and inverter operation.

Easy Installation

The compact DIN rail design allows the meter to be installed neatly within standard consumer units and electrical enclosures.

Installation Features

• DIN Rail Mounting
• Compact Footprint
• RS485 Communication Interface
• Simple Integration with Fox ESS Systems
• Supplied with 100A CT

Technical Specifications

Electrical

• Meter Type: Single Phase Smart Meter
• Communication: RS485
• Current Transformer: 100A External CT Included
• Accuracy Class: Class 1
• Voltage Accuracy: ±0.5%
• Power Accuracy: ±1%

General

• Display: LCD Screen
• Mounting Type: DIN Rail
• Operating Temperature: -25°C to +55°C
• Power Consumption: <1W

Compatibility

Compatible with:

• Fox ESS H1 G2 Hybrid Inverters
• Fox ESS KH Hybrid Inverters
• Fox ESS AC-Coupled Inverters
• Fox ESS Single-Phase Energy Storage Systems

Important

This model is designed for single-phase installations only.

For three-phase systems, please use the Fox ESS DTSU666 Three Phase Smart Meter.

Perfect For

• Residential Solar Installations
• Battery Storage Systems
• Export Limitation Applications
• Smart Energy Management
• Long Cable Run Installations
• Retrofit Solar Projects

Why Choose the Fox ESS DDSU666?

The DDSU666 Smart Meter provides accurate, reliable energy monitoring and is an essential accessory for optimising the performance of Fox ESS solar and battery storage systems. Its compact design, excellent accuracy, and seamless Fox ESS integration make it the preferred solution for professional installations.