Enphase Q-Relay for IQ7/IQ7+ Three Phase

#1: Q-RELAY-1P-INT

#3: 3791

Enphase Q Relay – Single Phase Network System Relay Controller

The Enphase Q Relay (Single Phase) is a dedicated network system relay controller designed to ensure safe disconnection and reconnection of Enphase microinverters from the AC grid. Acting as a galvanic disconnection device, it enhances safety, compliance, and system reliability in solar PV installations.

When grid voltage or frequency falls outside of acceptable limits, the Q Relay disconnects the microinverters from the grid. Once conditions return to normal, it safely reconnects them, ensuring seamless operation and protection for both the grid and your Enphase system.

⚠️ Important: The Enphase Q Relay is only available to purchase with Enphase Microinverters.

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Key Features

• ✅ Single-phase design with built-in contactors

• ✅ Automatic safety disconnect during grid abnormalities

• ✅ Reconnection once voltage and frequency stabilise

• ✅ Built-in current sensing to detect DC injection (VDE V 0126-1-1 compliant)

• ✅ Works with Enphase Envoy-S to break both line and neutral per grid requirements

• ✅ IP20 Rated – must be mounted in a protected enclosure

• ✅ Best practice installation – fit with the Envoy-S before commissioning

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Technical Overview

Application

• Ensures Enphase microinverters comply with grid safety standards

• Provides galvanic isolation for single-phase solar installations

Compliance & Safety

• Meets VDE V 0126-1-1 requirements for DC current detection

• Works in combination with the Enphase Envoy-S

Installation Guidance

• Install alongside Envoy-S and microinverters

• Mount within a protected IP-rated enclosure

• Refer to full installation documentation at enphase.com/support

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Why Use the Enphase Q Relay?

• Provides essential grid safety compliance for Enphase systems

• Protects both your solar installation and the electrical grid

• Designed for seamless integration with Envoy-S and Enphase microinverters

• Required component for professional Enphase installations in the UK

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✅ The Enphase Q Relay ensures your solar PV system remains safe, compliant, and efficient – an essential addition when installing Enphase Microinverters.