Multimeter M2 DC with SoC

The BLUE SEA SYSTEMS M2 DC multimeter with SoC (State of Charge) is a digital OLED monitor designed for precise energy management. It measures current, voltage, and battery state of charge. It is particularly useful for monitoring the full charge state of a battery, the voltage of up to three battery banks, and the current of one bank.

The M2 DC multimeter with SoC measures accurately:

Voltage for up to three battery banks (with a 0.01V DC resolution and ±1.0% accuracy). Current for one battery bank (with a range of -500A to 500A with the included shunt, and up to 5000A with external shunts). State of charge (SoC), capacity, remaining amp-hours (Ah), and charge cycles for the main battery (Battery 1).

The M2 DC multimeter with SoC features a 55 mm x 28 mm auto-dimmable OLED display.

Yes, the M2 monitor's front face is rated IP66, meaning it is protected against powerful water jets when installed according to the instructions. However, the rear of the unit is not waterproof and must not be exposed to water.

The M2 DC multimeter with SoC operates on a power supply range of 7V to 70V DC.

The M2 multimeter is compatible with 12V, 24V, 36V, and 48V battery systems.

Yes, the M2 DC multimeter with SoC (model 1830) can measure the voltage of up to three battery banks and the current of one battery bank.

The M2 multimeter is equipped with 80dB (or 92dB depending on the source) audible alarms for the following thresholds:

High current
High/low voltage
Low battery

Yes, the M2 multimeter integrates an isolated 500mA MOSFET relay. This relay can be used to activate external circuits based on configured alarm thresholds.

Yes, all settings of the M2 multimeter are stored in flash memory and retained even when the device is powered off. Additionally, the SoC 1830 monitor logs the current charge state and charge cycle values every 15 minutes. In the event of a restart or power loss, it will restore these values to their last saved state.

For a standard installation, the M2 multimeter requires a mounting hole with a diameter of 2-1/8 inches (54 mm).

The M2 multimeter can be mounted on a panel with a maximum thickness of 1 inch (25 mm).

For correct monitoring of the state of charge (SoC) with model 1830, the shunt must be connected between the negative terminal of battery 1 (service battery) and the main negative bus. All consumers and charging sources must have their negative terminals connected to the main negative bus, except for the negative source of the M2, which must be directly connected on the battery side of the shunt. The shunt's sensing wires must be a twisted pair.

Before starting the installation, it is imperative to:

Disconnect the inverter power cables from the battery if an inverter is installed.Stop and render any AC generator inoperative if a generator is installed.Ensure no other DC or AC source is connected to the boat’s wiring.Make sure Battery 1 (house battery) is fully charged for the initial setup.

The M2 multimeter’s 8-pin connector supports wire sizes from 16 to 26 AWG. For shunt sensing wires, a twisted pair is recommended for accurate State of Charge (SoC) calculation.

The M2 multimeter can be configured to monitor various battery types, including:

FLStd (Standard flooded lead-acid batteries)AGM (Standard AGM batteries)TPPL (Thin-plate pure lead AGM batteries)Gel (Gel batteries)FLRsv (Reserve lead-acid batteries)FLLoM (Low-maintenance sealed lead-acid batteries)CFoam (Carbon foam AGM batteries)Lilon (Lithium-Ion batteries)

Yes, although the M2 multimeter is supplied with a 500A/50mV shunt, it can display up to +/- 5000A. This requires the use of a 5000A/50mV shunt, which is not included and must be purchased separately.

The M2 multimeter’s power consumption ranges from 0.3W to 1.0W. This consumption varies depending on supply voltage, display intensity, and standby mode.