Maretron's DCM100 DC Monitor is an advanced electronic monitoring device used
to measure the voltage and current of any direct current (DC) power source or
load. Examples of DC power sources that can be monitored with the DCM100 include
batteries, alternators, solar panels, and wind generators. The DCM100 can also
be used to monitor DC loads like inverters, windlasses, DC refrigerators, or any
DC branch circuit. When the DCM100 is used to monitor batteries, sophisticated
circuitry and software algorithms monitor battery temperature, load current,
charging current and terminal voltage to precisely compute battery state of
charge, and time remaining. To measure current, the DCM100 uses an included
state-of-the-art Hall effect current sensor which simply slips over the wire -
you don't have to break connections or install connectors as you do with inline
shunts used by other solutions. Best of all, the DCM100 is NMEA 2000®
certified so you can view any and all DC information anywhere on the vessel
using a compatible NMEA 2000® display.
The DCM100 is a key component of Maretron's N2KView®
vessel monitoring and control system.
- Battery voltage
- Battery current
- Ripple voltage
- Battery case temperature
- State of charge
- Time remaining
- Charge efficiency factor
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Maretron’s Direct Current Monitor (DCM100) provides information about the DC
electrical system and in this example the DCM100 is used to monitor the house
battery bank. Vital battery information including voltage, current, state of
charge, and battery temperature are provided.

Maretron’s Direct Current Monitor (DCM100) provides information about the DC
electrical system. In this example the DCM100 is used to monitor the house
battery bank. This comprehensive system includes an 8” touchscreen (TSM800C) for
displaying information about the battery as well as triggering any associated
alarms or warnings. Triggered alarms or warnings can be sent off of the vessel
using the texting module (SMS100), for example if the battery voltage drops too
low for the bilge pumps to work. The Internet Protocol Gateway (IPG100) and WiFi
router (E2500) allows the information to be viewed wirelessly on the boat using
smartphones and tablets and remotely from the shore with an Internet connection.