Blue Sea 1850 M2 OLED Vessel Systems Monitor

The Blue Sea 1850 M2 Vessel Systems Monitor performs comprehensive monitoring of four critical boat systems in one compact OLED digital display. It is designed for boaters who want DC battery status, AC power quality, and bilge or tank monitoring without a wall of separate gauges.

One input monitors DC voltage, state-of-charge, and current for one battery bank while a second input tracks the voltage of an additional bank, with alarms for high and low voltage, high current, and low battery. On the AC side it tracks voltage, current, and frequency with its own set of alarms, and two configurable inputs can each be set up as a bilge pump monitor (tracking cycle counts and run time) or a tank monitor (capacity in gallons, liters, or percentage, with auto-calibrated custom tank shapes). Browse more options in our panels, switches, and circuit breakers category.

Key Features

• Monitors up to 2 DC battery banks
• single AC voltage/current/frequency monitoring
• 2 configurable bilge or tank inputs
• auto-calibrated custom tank shapes
• high/low alarms across all functions
• compact OLED display

Frequently Asked Questions

How many battery banks can this monitor? It monitors up to two DC battery banks, tracking voltage, state-of-charge, and current.

Can this monitor be used for both bilge pumps and tanks? Yes, its two configurable inputs can each be set up as either a bilge pump monitor or a tank level monitor.

Does this monitor AC power as well as DC? Yes, it monitors AC voltage, current, and frequency in addition to DC systems.