The Fox ESS WLan-WW (part number WLan-303645) is an IP65-rated remote monitoring dongle that connects compatible Fox ESS hybrid and AC-coupled inverters to the Fox ESS Cloud platform via a local WiFi and LAN connection. Designed for plug-and-play installation, it gives system owners and installers real-time performance data, historic generation records, and instant system alerts from anywhere, with no ongoing airtime or data contract required.
Because it relies on the property's existing broadband network rather than a mobile signal, the WLan-WW is the preferred choice wherever a stable home WiFi or wired LAN connection is available, offering a more consistent link than cellular alternatives in areas with weak mobile coverage.
USB / RJ45
Physical Interface
Typ. 3W
Power Consumption
Inverter Compatibility
The WLan-WW is confirmed compatible with Fox ESS H1 (G2) and H3 series hybrid inverters. It is not compatible with the V or R series inverters — check your inverter model before ordering to avoid a communication fault at commissioning.
Why Choose WiFi/LAN Over 4G
Unlike Fox ESS's cellular dongles, the WLan-WW uses your existing internet connection at no ongoing cost, and supports both wireless 802.11 b/g/n WiFi and a wired RJ45 LAN connection for installations where a stronger, more stable link is needed.
Dual Connection Modes
Offers both USB-connected WiFi (802.11 b/g/n) and a wired RJ45 LAN port, letting installers choose whichever connection method is most reliable at the inverter location.
Outdoor-Rated IP65 Enclosure
Rated to IP65 for dust and water-jet ingress protection, allowing safe outdoor installation directly alongside the inverter without additional weatherproof housing.
Secure Wireless Encryption
Supports WEP, WPA-PSK and WPA2-PSK security protocols, keeping the connection to the home network encrypted and protected from unauthorised access.
Flexible Network Configuration
Configurable via DHCP, Static IP, or firmware upload, giving installers the flexibility to integrate the dongle into networks with specific IP addressing requirements.
Real-Time & Historic Monitoring
Streams live generation and consumption data to the Fox ESS Cloud app, while also storing historic performance records and raising instant alerts if a fault occurs.
Wide Operating Temperature Range
Operates reliably from -25°C to +60°C, suiting the wide range of external conditions the dongle will face when mounted outdoors on the inverter enclosure.
General
| Model |
WLan-WW |
| Part Number |
WLan-303645 |
| Product Type |
USB / RJ45 WiFi & LAN Monitoring Dongle |
| Compatible Inverters |
Fox ESS H1 (G2), H3 series |
| Not Compatible With |
Fox ESS V series, R series |
| Installation Type |
Plug-in |
Electrical
| Input Voltage |
DC 7–12V |
| Power Consumption |
Typ. 3W |
Wireless & Communication
| Frequency Range |
2.4–2.472GHz |
| Wireless Standard |
802.11 b/g/n |
| Antenna Gain |
3dB (internal PCB antenna) |
| Security |
WEP / WPA-PSK / WPA2-PSK |
| Protocol |
TCP / UDP / HTTP / MQTT / SSL |
| Baud Rate |
9600, 8/N/1 |
| Transmitting Power |
19.5dBm (11b) / 14dBm (11g) / 13dBm (11n) |
| Configuration Interface |
DHCP / Static IP / Firmware Upload |
| Physical Interface |
USB, RJ45 |
Physical & Environmental
| Dimensions (W×H×D) |
130.0 × 48.0 × 27.0mm |
| Weight |
62g |
| Operating Temperature |
-25°C to +60°C |
| Storage Temperature |
-25°C to +60°C |
| Operating Humidity |
≤95%, non-condensing |
| Ingress Protection |
IP65 |
| Certification |
CE-RoHS (2011/65/EU and 2015/863/EU) |
Will the WLan-WW work with my Fox ESS V series or R series inverter?
No. The WLan-WW is confirmed compatible with Fox ESS H1 (G2) and H3 series inverters only. It is not designed for use with the V series or R series — fitting it to an incompatible inverter will prevent the dongle from communicating correctly with Fox ESS Cloud.
Do I need a mobile data or SIM contract to use this dongle?
No. The WLan-WW connects over your existing home WiFi network or a wired LAN cable, so there is no SIM card, mobile signal, or ongoing airtime cost involved.
Can I use a wired connection instead of WiFi?
Yes. The WLan-WW includes an RJ45 port alongside its WiFi capability, so it can be connected directly to your router or network switch via an Ethernet cable if a wired connection is preferred or more reliable at the installation site.
Is the dongle suitable for outdoor installation?
Yes. It carries an IP65 ingress protection rating and an operating temperature range of -25°C to +60°C, making it suitable for mounting outdoors alongside the inverter.
How is the dongle configured once installed?
The WLan-WW supports DHCP for automatic network configuration, or Static IP and firmware upload for installers who need manual control over the network setup.
