The Mastervolt BattMan Pro is an affordable and accurate battery monitor for 12/24 V DC systems, equipped with a large, splash-proof display (IP65) and built-in energy meter. The monitor displays real-time information on battery status including voltage, current, amp-hours, remaining time, and state of charge in percentage. It also stores historical data on the battery and alarm messages.

Thanks to its clear, universally readable display with backlighting, all data remains visible in all conditions. The BattMan Pro issues timely warnings when the battery set is nearly empty and shows the remaining runtime before charging is required.

The unit supports two battery connections: one for full monitoring (service battery) and one for voltage measurement only (start battery). Accurate current measurement is achieved via the included 500 A/50 mV shunt. The BattMan Pro is not compatible with MasterBus.

Technical specifications:

• Battery connections: 2 (service + start)
• Display readings: voltage, current, amp-hours, remaining time, SOC %, historical data
• Languages: universal symbols
• Display: Ø 64 mm, mounting depth 79 mm, IP65 rated
• Shunt dimensions: 87 x 45 x 35 mm
• Power supply voltage: 9–35 V DC
• Voltage range: 0–35 V
• Max. battery capacity: 9999 Ah
• Current draw (backlight off/on): 8/30 mA @ 12 V, 6/18 mA @ 24 V
• Voltage resolution: 0.01 V
• Voltage accuracy: ± 0.3%
• Current measurement range: 0–500 A
• Current accuracy: ± 0.4%
• Shunt specification: 500 A / 50 mV
• Battery alarm contact: potential-free relay
• Historical data storage: yes
• Remaining time indication: yes
• MasterBus compatible: no
• Required cabling: 6-core signal cable (not included), no modular cable needed