Blue Sea Systems 1830 M2 DC Battery Monitor with 500A Shunt

The Blue Sea Systems M2 DC State of Charge Monitor provides accurate battery bank monitoring by measuring actual amperage flow rather than relying on voltage readings alone. This precision approach gives you the same confidence in your battery capacity as a fuel gauge provides for your gas tank, helping you avoid unexpected power loss on the water or road.

The M2 monitors one battery bank using the included 500A shunt to track current flowing in and out of your system. The high-resolution OLED display shows multiple critical parameters including state-of-charge percentage, hours remaining, amp hours (Ah) remaining, and total charging cycles. The bright display features auto-dimming technology and provides superior contrast and readability compared to traditional LED displays.

Key Features:

• Amperage-based monitoring for accurate state-of-charge calculations
• Includes 500A shunt for complete installation
• Bright OLED display with auto-dimming and high contrast
• Built-in MOSFET External Circuit Relay for controlling external circuits based on monitored values
• Programmable 92dB alarm with multiple alert types
• IP66 waterproof rating with gasketed face
• Compatible with 12V, 24V, and 48V systems (8-70V range)
• Low power consumption: 0.3W minimum, less than 1W maximum

Technical Specifications:

• Voltage range: 7-70V DC with 0.01V DC resolution
• Current range: -500 to 500A (up to 5000A with optional shunts)
• Display size: 1 3/16"H x 2 1/4"W (28mm x 55mm)
• Overall dimensions: 3 1/16"H x 3 1/16"W x 17/32"D (78mm x 78mm x 14.05mm)
• Mounting hole: 2 1/8" diameter x up to 1" deep
• Glass-reinforced nylon case construction
• No fasteners required for installation

Alarm Functions: High current, high/low voltage, and low battery alerts with programmable thresholds.

Backed by a three-year warranty. Weight: 0.25 lbs (0.11 kg).