Egis Relays & Contactors
Egis XD Series Flex 2 relays, ACRs (Automatic Charging Relays), contactors, time-delay relays, and power distribution modules. Including the NMEA 2000-connected XD Series with DT/DTM connector kits for plug-and-play installation.
Marine Electric Systems sells and installs Egis products in Annapolis, Maryland, including XD Flex systems and ACRs on boats throughout the Chesapeake.
Egis Relays & Contactors FAQ
What does an Automatic Charging Relay (ACR) do?
An ACR connects two battery banks when it senses charging voltage, so the alternator or charger can top up both, and separates them when voltage drops. That keeps your house loads from draining the starting battery. It's often paired with a manual battery switch for emergency combining.
What's the difference between a relay and a contactor?
Both use a small control signal to switch a circuit on and off. A contactor is built to carry much higher current, so it's the choice for heavy feeds like a windlass, thruster, or main battery disconnect, while relays handle smaller loads. Either one still needs its own overcurrent protection on the circuit it switches.
Why choose an NMEA 2000-connected relay system?
The XD Series ties into the boat's NMEA 2000 network, so circuits can be switched and monitored from devices on that network instead of running a separate switch wire for every load. Check that your display or controller supports it before you buy. If you're planning a digital switching system, call (410) 263-0807 or contact us; we install throughout Annapolis and the Chesapeake Bay.
