Fox ESS 4G-2 Monitoring Dongle for H3 Pro Inverter
The Fox ESS 4G-2 Dongle (part number FE-4G-2-DONGLE) is a cellular remote monitoring module for single-unit Fox ESS H3 Pro inverter installations. It connects the PV system to the Fox ESS Cloud monitoring platform via 4G/GPRS, making it suitable for sites without reliable WiFi or LAN connectivity. The dongle includes an integrated 5-year SIM card plan (Vodafone) and begins communicating immediately upon activation. Remote monitoring is available via smartphone or web portal. Available from DECO Group, a UK-based solar wholesaler for trade installers.
Key Technical Details
- Part number: FE-4G-2-DONGLE
- Connectivity: Smart 4G and GPRS 2.0 (850/900/1800/1900 MHz)
- Communication protocol: RS485
- Connection interface: USB Type A (plug-and-play)
- Working voltage: 7 V to 12 V DC
- Power consumption: approximately 1 W
- Ingress protection: IP65
- Operating temperature: -20°C to +60°C
- Storage temperature: -40°C to +85°C
- Dimensions: 110 x 48 x 27 mm (H x W x D)
- Weight: 1 kg
- Included SIM: 5-year prepaid plan (Vodafone)
Key Features
- Cellular connectivity for sites without WiFi or LAN, using 4G with GPRS fallback
- Integrated 5-year SIM card plan; no separate data contract required
- Plug-and-play installation via USB Type A connection
- IP65 rated for indoor or sheltered outdoor installation
- Real-time monitoring of PV and battery system performance via Fox ESS Cloud
- Low power consumption at approximately 1 W
System Compatibility
- For single-unit Fox ESS H3 Pro installations only
- For parallel H3 Pro installations, an external EMS (AI Link) is required instead, which acts as a full system data logger; individual dongles are not required in that configuration
- Not compatible with Fox ESS AC3, V, or R series inverters
Common Questions
Click a question below to reveal the answer.
Which Fox ESS inverters is the 4G-2 Dongle compatible with?
The FE-4G-2-DONGLE is designed for single-unit Fox ESS H3 Pro installations only. It is not compatible with the AC3, V, or R series. For parallel H3 Pro setups, an AI Link EMS is required instead of individual dongles.
Does the Fox ESS 4G-2 Dongle include a SIM card?
Yes. The dongle includes an integrated 5-year prepaid SIM card plan (Vodafone). It begins communicating immediately upon activation with no separate data contract needed.
Can I use this dongle where there is no WiFi?
Yes. The 4G-2 Dongle uses cellular connectivity (4G with GPRS fallback) and is specifically designed for sites without reliable WiFi or LAN access.
DECO Group supplies Fox ESS monitoring accessories including WiFi dongles, 4G dongles, and AI Link EMS units alongside the full range of Fox hybrid and AC inverters. Browse our Fox ESS monitoring and communications range for complete system connectivity options.
About DECO Group
We are a UK solar wholesaler and distributor supplying Fox ESS inverters, monitoring hardware, and system accessories to professional installers and electrical contractors. Our range includes all Fox ESS communication and data logging products to support remote monitoring across residential and commercial installations. Visit decogroup.co.uk for the full catalogue.
