All guides · Batteries and charging
To monitor your boat from home, you need usable measurements, a compatible GX solution, and internet on board. I would first select the information and alarms that can help you make a concrete decision.
Four links must work together
- Measurement: Battery, shunt, charger, or sensor must provide the desired data.
- Connection: The equipment must be connectable to the GX device with a supported interface.
- Internet: The boat's connection must be active, even when you are at home.
- VRM: The system is registered, and display, access, and relevant alarms are set up.
Cerbo GX can collect data from compatible equipment. A local GX display can be useful on board, but a screen alone is not an internet connection.
What do you actually want to keep an eye on?
| Questions from home | This requires |
|---|---|
| Is the battery's energy reserve falling? | A correctly configured source for battery state of charge and a relevant history over time. |
| Are the solar panels charging? | Supported data from the solar charge controller. |
| Is shore power gone? | A supported measurement of the AC supply and appropriate alarm setup. |
| Is the information current? | Checking the latest update and notification in case of missing data. |
Internet is part of the installation
Victron describes Ethernet, Wi-Fi, and a mobile router as connectivity options, among others. The harbor's Wi-Fi may require a login or have varying coverage. A mobile connection requires appropriate equipment, coverage, and a subscription.
I would test the connection from your phone after the boat has been left in its normal harbor state. Verify that the GX and router still have power when the breakers you normally turn off are switched off.
Monitoring also consumes energy
Assume that the GX, router, and accessories together use 8 W on average. This results in 192 Wh per day, equivalent to 16 Ah in a simplified 12 V calculation. The figure is an example; measure or calculate your specific equipment before including it in your winter budget.
An alarm should lead to action
Agree on who will respond if the battery level drops or data is missing. VRM can show history and supported alarms, but a latest measurement is not proof of the boat's condition right now if the connection has been lost. Test the notifications and access rights before relying on them.
Sources and manufacturer documentation
Manufacturer documentation verified September 2026. Always follow the manual for the specific model and installation. The calculation examples are simplified examples for planning purposes.
Continuing with your solution
Tell me which Victron devices you already have and what you want to see from home, and I will help you find the missing connections.