Mastervolt Masterlink BTM-III Battery Monitor 12/24V

Description

The Mastervolt Masterlink BTM-III Battery Monitor is an advanced and reliable solution for monitoring multiple battery banks in marine, automotive, RV, and industrial power systems. Designed to eliminate unexpected battery failures, the BTM-III provides real-time and highly accurate information on voltage, current, remaining capacity, and estimated runtime.

With support for up to three battery banks (service, starter, and bowthruster), the monitor ensures complete control over your onboard power. The built-in microprocessor calculates actual battery health and stores historical usage data to help you identify trends and optimize system performance.

The BTM-III includes a high-quality 500A/50mV shunt, enabling precise current measurement up to 500A (optionally up to 1000A). Its clear display provides easy access to essential parameters, special battery status events, and multiple language options.

Compact, powerful, and easy to install, this battery monitor is an essential tool for anyone who needs accurate power management and continuous insight into battery performance.

⭐ Key Features

• Real-time monitoring of up to 3 battery banks

• Displays voltage, current, amp-hours, remaining time, and battery capacity (%)

• Built-in microprocessor for accurate calculations

• Stores historic battery data

• Ideal for marine, RV, and off-grid systems

• Battery alarm contact for safety

• High-resolution voltage display (0.01V)

• Compatible with 12V and 24V systems

• Precise 500A/50mV shunt included

• Multi-language display (10 languages)

🔧 Technical Specifications

Electrical

• Max Ah Capacity: 9999 Ah

• Supply Voltage: 8–50 V

• Voltage Range: 7–35 V

• Current Consumption (Backlight Off): 28 mA (12V), 16 mA (24V)

• Current Consumption (Backlight On): 100 mA (12V), 50 mA (24V)

• Voltage Resolution: 0.01 V

• Voltage Accuracy: ±0.6%

• Current Measurement Range: 0–500 A (optional 1000 A)

• Shunt: 500 A / 50 mV

• Current Accuracy: ±0.8%

• Battery Alarm: Yes, open collector

• Remaining Time Indicator: Yes

• Historical Data Storage: Yes

• MasterBus Compatible: No

General

• Battery Outputs: 3 (service, starter, bowthruster)

• Display: Voltage, current, Ah, time remaining, battery %, events

• Languages: EN, NL, FR, ES, DE, DA, FI, NO, IT, SV

• Built-in Depth: 40 mm (55 mm incl. cover & cable)

• Dimensions (HxWxD): 65 × 120 × 40 mm

• Shunt Dimensions: 84 × 44 × 44 mm

• Weight: 0.25 kg