# Popular Articles

## Using a BMV 712 alarm as a signal to start a generator

The Victron BMV series Amp Hour Meters have a programmable relay output on the back of the meter. You can program it to operate based on voltage, state of charge, temperature, or other parameters. The procedure is detailed in the instruction ...

## Fuse and DC cables for MultiPlus 12/3000

The normal fuse you would install with the 12 volt MultiPlus 12/3000 is at least 350 Amps. This is because it has a surge capability and because as the battery voltage varies so does the current. A 350 amp fuse will avoid nuisance tripping caused ...

## How to calculate wire size

For DC wires there are two things to consider, the ampacity of the wire and the voltage drop. In low voltage DC circuits the voltage drop tables will give you the larger result in most if not all cases. Here is a link to the tables: Voltage Drop ...

## Can I exceed the power rating of my MPPT charge controller?

Here is the table of recommended maximum power ratings: The charge controller will only pass its rated amps which is the second part of the model number. 100/20 means 100 volts maximum input, 20 Amps maximum output. If you have more power ...

## Resetting your BMV battery monitor when you get new batteries

The instructions for the Victron BMV battery monitor are here. The BMV learns the history of your batteries over time. When you replace the batteries you need to erase the history and start again. Here is what it stores: Here is the relevant part ...