Mastervolt Masterlink/BTM-III - 70403163

SKU: EX 70403163

1-2 weeks delivery time

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The Mastervolt Masterlink BTM-III (70403163) is a professional battery monitor for marine and mobile energy systems. It tracks voltage, current, amp-hours, remaining time, and state of charge for up to three separate battery banks. The BTM-III is ideal for 12V, 24V, and 48V systems and includes a high-precision 500A/50mV shunt. With multilingual support and integrated historical data logging, it provides total battery insight to avoid unpleasant surprises.

Description
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Mastervolt 70403163 – Masterlink BTM-III Battery Monitor (3 Banks, Multi-Language, 9999Ah, 500A Shunt)

The Masterlink BTM-III is a sophisticated battery monitor panel designed to give users full insight into their DC power system. It measures voltage, current, capacity, amp-hours, and remaining runtime for up to three separate battery banks (typically service, starter, and bow thruster). Using a built-in microprocessor, it calculates battery health, logs historical performance, and raises alarms if limits are exceeded.

With support for ten languages and a clear digital display, the BTM-III is ideal for marine, RV, and off-grid applications. It includes a 500A shunt and is compatible with system voltages up to 48V. The unit is standalone and does not require MasterBus or special cabling, making installation straightforward and flexible.

Key Features

Monitors up to 3 battery banks: service, starter, and bow thruster
Displays voltage, current, amp-hours, time remaining, and battery %
High accuracy measurement with built-in 500 A / 50 mV shunt
Stores historical data for trend analysis
Remaining runtime calculation based on usage
Open collector alarm output for external alerts
Multi-language interface (10 languages)
Standalone operation – no MasterBus or special cables required

Display Languages

English
Dutch
French
Spanish
German
Danish
Finnish
Norwegian
Italian
Swedish

General Specifications

Parameter	Value
Battery Outputs	3 (service, starter & bowthruster)
Display Read-Out	Voltage, current, Ah, time remaining, battery %
Built-in Depth	40 mm (55 mm incl. cover/cable)
Dimensions (HxWxD)	65 x 120 x 40 mm
Shunt Dimensions (HxWxD)	84 x 44 x 44 mm
Weight	0.25 kg / 0.6 lb

Technical Specifications

Parameter	Value
Max Ah Capacity	9999 Ah
Supply Voltage	8–50 V DC
Voltage Range	7–35 V
Current Consumption (Backlight Off)	28 mA @ 12 V / 16 mA @ 24 V
Current Consumption (Backlight On)	100 mA @ 12 V / 50 mA @ 24 V
Voltage Resolution	0.01 V
Voltage Accuracy	± 0.6%
Current Range	0–500 A (optionally 1000 A)
Current Accuracy	± 0.8%
Shunt Spec	500 A / 50 mV
Battery Alarm Output	Yes (open collector)
Remaining Time Indication	Yes
Historical Data Logging	Yes
MasterBus Compatible	No
Special Cabling Required	No