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What is MasterBus?

MasterBus is a protocol for

exchanging information

between the connected components

within an electric system. MasterBus

is also the standard for a plug & play

information system for (de)centralised

operation, service and monitoring.

MasterBus ensures you a simple, logical

and reliable energy system.

What can I do with


The MasterBus system is

incredibly flexible and can be designed

and extended to any size. Using several

handy interfaces, it is also possible to

connect all sorts of conventional products

to MasterBus. Via the MasterBus

USB interface, for example, you can

connect a PC or a laptop to the system.

Can I connect other

products to the


Yes, that is possible. Although MasterBus

is a Mastervolt-specific protocol, non

-Mastervolt products can still be

connected to the system. Equipment

with maritime standard NMEA 2000

connections can be easily connected via

the MasterBus NMEA 2000 Interface. In

addition, the MasterBus network can

be integrated within your own central

system by means of the MasterBus

Modbus Interface or the MasterBus

Firecan Interface.

Is MasterBus an open


No, MasterBus is a closed

protocol. This allows Mastervolt to

guarantee that a MasterBus system

works safely and without interference,

with a uniform data supply and no

unwanted interruptions. Components

from other suppliers can be connected

via the communication interfaces

specially designed by Mastervolt. They

ensure a safe and pure transition to the

protocol and operate as a firewall against

data interference and voltage conflicts.

This ensures that the MasterBus network

is always safe and reliable.

What is the basis of


MasterBus hardware is based

on CANbus V2.0 technology. The software

communication protocol was designed by

Mastervolt to maximise the performance

of an electrical power system.

How many Mastervolt

products can I connect

to a MasterBus?

You can connect a maximum of 63

products within a MasterBus data


What is the maximum

cable length?


250 m with less than 10

connected products.


150 m with up to 25 connected



100 m with up to 50 connected


Or use a MasterBus Repeater.

What cables

should I use?

We advise using the green

Mastervolt cables, but MasterBus also

works with high quality UTP cables.

A Mastervolt DIY kit contains all you need

to make the cables for a complete system

of any desired length.

How do I connect a


The MasterBus data network

lifeline is the cable which runs as a chain

from component to component. Both

ends of the cable should be provided

with a MasterBus terminator. On each

MasterBus product are two equal

communication ports for connection.

By connecting a MasterBus cable to each

of the ports you add the product to the

chain. The terminators at both ends

of the cable ensure interference-free

operation, prevent reflection of data

signals and ensure high communication


Do components always

have to be connected

as a chain?

The MasterBus network requires that

all components together create a chain

with terminators at both ends. Circular

configurations or branch systems may

interrupt the data supply and power

supply, damaging the connected


What might be

the causes of a


MasterBus network?


One or both terminators are missing

on the outside components in the chain.


One of the cables is disconnected or

incorrectly connected: Check whether you

see an open communication port.


One of the plugs is not properly

connected to the cable.

Do I need an

additional power

supply for MasterBus


No. A number of the connected

components, such as the MasterShunt

and the Mass battery charger, can supply

the necessary MasterBus power. Other

components such as interfaces and

MasterView panels consume this power.

The MasterBus cable is simultaneously

responsible for data communication and

power provision.

Can I connect different

batteries to the same

MasterBus circuit?

Yes. As all power supply sources within a

MasterBus circuit are galvanically isolated,

all connections are completely safe.

Frequently asked questions

about MasterBus















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