FAQ

Fuselink reads the fuse states from your Victron Lynx Distributor chain over its RJ10 (I²C) port and presents them to your Cerbo GX over USB. Venus OS already includes the UI pages for Lynx Distributor fuses — Fuselink just provides the data they need.

One Fuselink unit and one 1.5 m USB cable (USB-A on the Cerbo end, USB-C on the Fuselink end), plus a quick-start card. You'll need a standard Victron RJ10 cable — the same one that comes with a Lynx Smart BMS — to reach your distributor.

£99 inc. VAT, delivered free anywhere in the UK. For trade orders over five units, contact us for a price.

No. The install flow is: press the button on Fuselink, plug it into the Cerbo, reboot the Cerbo, press the button again, plug in the RJ10 cable. You never have to open a terminal or edit a file.

Any GX device running Venus OS v3.0 or newer with a free USB host port. That's the Cerbo GX, Cerbo GX MK2, and most Ekranos / Ekrano GX setups. The Color Control GX (CCGX) is not officially supported because its USB stack is older.

Up to four. Each Lynx Distributor has a 2-way DIP switch on the back that selects an I²C address from 0 to 3. With four addresses, four distributors per chain is the hardware limit.

Yes, comfortably. A standard USB port supplies 500 mA. The Fuselink module itself draws around 80 mA in run mode, and each Lynx Distributor's logic board uses around 20–40 mA — so a fully populated four-distributor chain pulls about 240 mA at the absolute worst case. That leaves more than 50% headroom on the USB rail.

No. Fuselink replaces the BMS as the thing that lights up the fuse pages. If you already have a Lynx Smart BMS, you don't need Fuselink. If you don't have one and don't want to spend several hundred pounds just to see fuse states, Fuselink is for you.

Yes — Fuselink is designed not to collide with a BMS on the bus. That said, if you have a BMS, the BMS already does this job and you don't need Fuselink.

No. Fuselink is specifically for the Lynx Distributor — the unit with four fuses and front-panel LEDs. The Lynx Power-in has no fuses; the Lynx Shunt is a different device with its own VE.Direct port.

No. Fuselink is read-only by design. It only publishes fuse telemetry — it has no path to send control commands to anything else on the bus, and it's explicitly designed not to participate in Victron's charge-control logic. Safe to leave installed permanently.

No. In normal use it's a USB-attached device — no Wi-Fi, no Bluetooth, no cloud. The only time it uses Wi-Fi is when you put it in recovery mode to download a firmware update, and even then it talks only to fuselink.uk.

Hold the button for five seconds. Fuselink enters Wi-Fi recovery mode and hosts a captive portal. Connect to it from your phone, pick your home Wi-Fi, and it pulls the latest firmware from fuselink.uk/firmware/latest.json automatically.

Blue: install mode (USB mass-storage). Green: run mode, reading and streaming fuse data. Amber pulsing: Wi-Fi recovery mode. Red: fault — the easiest fix is to unplug, wait five seconds, and plug it back in.

Twelve months from delivery, covering manufacturing defects. We don't cover damage caused by reverse-polarity power on the RJ10 (which shouldn't be possible with standard Victron cables anyway).

Yes — 30 days, no questions. If it isn't right for your install, send it back and we'll refund you in full (you cover return postage).

The Cerbo's built-in Lynx Distributor fuse pages light up — the same pages that work with a Lynx Smart BMS. Tap any fuse to give it a name; the Cerbo handles the rest, including alarms.

"Lynx" is a Victron trademark — we'd never use it in our own product name. Fuselink is the brand; we describe what it works with (Lynx Distributor, Cerbo GX) because compatibility-talk requires it.

No. Fuselink is an independent product. We don't decompile or reuse Victron's code. The Cerbo runs an open-source operating system; we feed its standard input format and the existing fuse pages do their thing.