Three-phase Q relay Enphase Q-RELAY-3P-INT - IQ7/IQ8 Microinverter Decoupling Protection
The Enphase three-phase Q-Relay is an essential protection and decoupling device that ensures your solar installation complies with grid standards. This smart relay acts as a safety circuit breaker, capable of instantly isolating your microinverters from the electrical grid in the event of a voltage or frequency anomaly, thus ensuring optimal protection for equipment and people.
A true centrepiece of the Enphase Energy ecosystem, the Q-Relay (3P) is designed to work in harmony with the Envoy-S or IQ Gateway. It continuously monitors the three phases of the system and controls automatic reconnection once grid conditions have stabilised. This module is essential for the proper functioning of IQ7 and IQ8 microinverters, ensuring the safety of your solar panels while simplifying the wiring in your electrical panel.
The technical advantages of the three-phase Q-Relay include:
- Integrated protection against frequency and voltage variations (VDE standard).
- Simplified installation on DIN rail for time savings during assembly.
- Intelligent disconnection management on all three phases for total safety.
Installation of a Q-Relay is mandatory to validate the Enphase warranty and ensure reliable and compliant energy production over the long term.
EAN: 0712971131248
Enphase three-phase Q relay - Intelligent decoupling protection
The Enphase 3-Phase Q-Relay (Q-RELAY-3P-INT ) is an intelligent 4-pole decoupling protection device designed for photovoltaic installations with Enphase IQ7 and IQ8 series microinverters. It continuously monitors the grid and automatically disconnects the microinverters in the event of a grid fault, in accordance with strict European regulations.
This relay is essential for Enphase three-phase installations to ensure compliance with grid safety standards and to enable automatic reconnection when normal conditions are restored.

Grid safety and compliance
The four-pole Q Relay monitors power system parameters in real time and reacts instantly to faults:
- Voltage monitoring: Automatic detection of overvoltage and undervoltage on each phase (L1, L2, L3)
- Frequency monitoring: Protection against frequency variations (min f / max f)
- DC injection detection: Continuous measurement of DC injection to protect the network
- Four-pole isolation: Physical disconnection of all phases (L1, L2, L3) and neutral (N)
- Automatic reconnection: Automatic re-establishment of connection when normal network conditions return
Regulatory compliance: The Q Relay meets the strict requirements of the European decoupling protection standards for grid-connected photovoltaic installations (IEC 61010, EN 61010-1).
Intelligent operation with Envoy-S
The Q Relay works in perfect synergy with the Enphase Envoy-S gateway for centralised, intelligent management:
- Communication via Envoy-S: The relay receives its commands and transmits its status via the Envoy-S gateway.
- Remote software updates: Relay firmware can be updated via the Enphase cloud
- Flexible configuration: The relay can be configured to monitor 1, 2 or 3 phases depending on your installation
- Real-time monitoring: View relay status via the Enphase Enlighten application
Quick and easy installation
Designed to facilitate the work of installers, the three-phase Q Relay stands out for its ease of installation:
- Standard 35mm DIN rail mounting: Quick installation in any electrical panel
- Compact and lightweight: Only 107mm wide (approx. 6 DIN modules)
- Clear terminal blocks: Easy identification of inputs (L1, L2, L3, N) and outputs
- Integrated diagnostic LEDs: 4 red/green LEDs for instantaneous display of the status of each phase and tripping conditions
Detailed technical specifications
| Caractéristique | Valeur |
|---|---|
| Référence Enphase | Q-RELAY-3P-INT |
| EAN13 | 0712971131248 |
| Type de protection | Protection de découplage tétrapolaire (50Hz) avec détection injection DC |
| Catégorie surtension (EN 61010-1) | III |
| Degré de pollution (EN 61010-1) | 2 |
| Plage de fonctionnement tension AC | 85 – 265 Veff |
| Tension d'entrée nominale (Vnom) | 230 / 240 Veff |
| Fréquence nominale | 50 Hz |
| Temps d'acquisition (fonctionnement normal) | 100 ms (5 cycles @ 50Hz) |
| Nombre d'entrées tension protégée | Jusqu'à 3 phases |
| Nombre micro-onduleurs IQ7 par phase | Jusqu'à 19 x IQ7 ou 16 x IQ7+ par phase |
| Nombre micro-onduleurs IQ8 par phase | Jusqu'à 12 x IQ8M ou 10 x IQ8+ par phase |
| Nombre max de Relais Q par système | 20 relais Q actifs max |
| Type de sortie électrique | Relais tétrapolaire normalement ouvert (L1, L2, L3, N) |
| Puissance de sortie | 6 kVA par phase |
| Tension / Courant sortie | 230 / 240 Veff, 25A par phase |
| Puissance de consommation à vide | 18 VA |
| LEDs de diagnostic | 4 LEDs rouge/vert : 3 pour surtension/sous-tension + 1 pour fréquence/injection DC |
| Montage | Rail DIN 35mm (standard) |
| Largeur | 107 mm (~6 modules DIN) |
| Plage température fonctionnement | -40°C à +50°C |
| Indice de protection | IP20 (utilisation en environnement protégé) |
| Humidité | 0 à 95% sans condensation |
| Conformité | IEC 61010, EN 61010-1, IEC 61326, BS EN 50065-1&2-2, BS EN 61326-1&2, BS EN 61000-3-11&12 |
| Garantie | 5 ans constructeur Enphase |
Installation capacity per phase
| Modèle micro-onduleur | Puissance nominale | Nombre max par phase | Puissance totale par phase |
|---|---|---|---|
| Enphase IQ7 | 290 W | 19 unités | 5,5 kW |
| Enphase IQ7+ | 349 W | 16 unités | 5,6 kW |
| Enphase IQ7X | 384 W | 15 unités | 5,8 kW |
| Enphase IQ7A | 366 W | 16 unités | 5,9 kW |
| Enphase IQ8M | 480 W | 12 unités | 5,8 kW |
| Enphase IQ8+ | 384 W | 15 unités | 5,8 kW |
| Enphase IQ8P | 480 W | 12 unités | 5,8 kW |
Important note: For three-phase installations, the total system power can be up to 18 kW (6 kW x 3 phases) with a single three-phase Q Relay.
Visual diagnostics with LEDs
The Q Relay incorporates a system of 4 red/green LEDs for easy diagnosis:
- 🔴 LED L1 (red): Overvoltage or undervoltage detected on phase L1.
- 🔴 LED L2 (red): Overvoltage or undervoltage detected on phase L2.
- 🔴 LED L3 (red): Overvoltage or undervoltage detected on phase L3.
- 🔴 LED F/DC (red): Frequency trip (min f / max f) or DC injection detected.
- 🟢 strong>All LEDs green: Normal operation, all phases OK
Applications and compatibility
The three-phase Q Relay is designed for Enphase three-phase photovoltaic installations:
- Three-phase residential installations up to 18 kW
- Commercial and SME installations with Enphase microinverters
- IQ7, IQ7+, IQ7X, IQ7A microinverter compatible
- IQ8M, IQ8+, IQ8P, IQ8MC microinverter compatible
- Requires Enphase Envoy-S gateway (Standard or Metered)
- Limited to a maximum of 20 active Q Relays per Enphase system
Compatible Enphase ecosystem
For a complete and optimal Enphase installation, the three-phase Q Relay works with :
- IQ7 series microinverters: IQ7, IQ7+, IQ7X, IQ7A - discover our IQ7 microinverter range
- IQ8 series microinverters: IQ8M, IQ8+, IQ8P, IQ8MC - discover our IQ8 microinverter range
- Envoy-S Standard Gateway: Basic PV production monitoring - see Envoy-S Standard
- Envoy-S Metered Gateway: Monitoring production + consumption - see Envoy-S Metered
- Enphase Enlighten application: Real-time monitoring on smartphone/tablet/computer
Installation and commissioning
The three-phase Q Relay must be installed by a certified Enphase installer:
- DIN rail mounting: Install the relay in the AC electrical panel on a 35mm DIN rail.
- Input connection: Connect the 3 phases + neutral from the main switchboard to the relay input terminals.
- Output connection: Connect the relay outputs to the Enphase microinverters (via AC connection box)
- Envoy-S connection: Connect the relay to the Envoy-S gateway (PLC connection via mains)
- Software configuration: Set up the relay via the Enphase Installer App (number of phases monitored, thresholds, etc.)
- Function test: Check diagnostic LEDs and display in Enlighten
⚠️ Important: Installation of an Enphase system with Q Relay requires Enphase certification. Only certified installers can activate the system via the Enphase Installer App.
Benefits of the Enphase 3-phase Q Relay
- Maximum safety: Four-pole isolation (L1, L2, L3, N) in the event of a mains fault.
- Guaranteed compliance: Meets strict European mains protection standards
- Automatic reconnection: No manual intervention required
- Flexible configuration: 1, 2 or 3 phases depending on installation
- Visual diagnostics: 4 LEDs for rapid fault identification
- OTA updates: Firmware updated remotely via Enphase cloud
- 5-year warranty: Enphase manufacturer coverage
- Enphase ecosystem: seamless integration with IQ7, IQ8, Envoy-S, Enlighten
Order your three-phase Q Relay for intelligent network protection now!
Three-phase Q relay Enphase Q-RELAY-3P-INT - IQ7/IQ8 Microinverter Decoupling Protection — Electrical hardware
Three-phase Q relay Enphase Q-RELAY-3P-INT - IQ7/IQ8 Microinverter Decoupling Protection by Enphase is available in our Electrical hardware catalog. Product weight: 0.5 kg. Reference: Q-RELAY-3P-INT.