The MasterShunt is an integrated battery monitor which can share information about the battery bank with other devices, such as chargers or inverters, in a MasterBus, CZone or NMEA 2000 systems. It can give detail on voltage, current, state of charge and time remaining of the battery (calculated accurately by using the current flow and the remaining capacity). Because you can then programme events to trigger on different events, such as turning on a generator when the battery capacity is low, it allows the whole system to be automated and run seemlessly.

The MasterShunt 500 has been improved upon to give the highest degree of accuracy in its readings and calculations. It retains historical data and doesn't lose its memory when the system is disconnected. It is straight forward to install and connect, and features a robust housing with isolated DC connectors for reliability. MasterShunts can also be installed in a parallel setup if higher currents are used.

Communication & monitoring

Communication interfaces: MasterBus, CZone, NMEA 2000

General specifications

MasterBus powering: yes, incl. Smart MasterBus Powering (switched off for CZone or NMEA 2000 communication)

Battery voltage: 12, 24, 36 or 48 V DC

Current: 300 A continuously, 400 A for 10 min., 500 A for 5 min. and 600 A for 2 min.

Main fuse: bus bar included in MasterShunt, Class T fuse or ANL fuse to be ordered separately

Idle consumption: 23 mA (normal operation), <1 mA (power saving, MasterBus off)

System functionality: alarms, timers, auto start/stop for generator

System information: e.g. time remaining, voltage, current, state of charge

Programmable alarms: warning low voltage, low state of charge, high voltage

Dimensions, hxwxd: 150 x 150 x 65 mm (5.9 x 5.9 x 2.6 inch)

Weight: 0.7 kg (1.5 lb)

Delivered with: MasterShunt, temperature sensor, MasterBus terminator, insulation caps for DC connections, 1 mtr Mastervolt-CZone drop cable

Technical specifications

Battery types: Gel, AGM, flooded, Lithium Ion

Protection degree: IP21

Key Features

Straight forward, easy to install

MasterBus, CZone and NMEA 2000 communication

Fits in a CZone system including setup tools and configuration file

Digital shunt providing the energy system with extensive information and historical data

Very accurate and reliable determination of State of Charge (SOC)

Service mode prevents memory loss during system maintenance

Realistic and precise indication of the time remaining

For higher current, multiple MasterShunt models may be installed in parallel

MasterConnect system makes connecting to the DC Distribution product very easy

Freedom of choice for fuse type, rating and location. Suitable for T-fuse and ANL-fuse (to be ordered separately)

Robust housing with isolation of the DC connections