Egis Mobile Electric Battery Isolators & Voltage Sensitive Relays

Egis Mobile Electric: Precision Battery Isolation for Demanding Applications

When a dead start battery isn't just an inconvenience but a mission-critical failure, the engineering behind your battery isolation system matters. Egis Mobile Electric has built its reputation on exactly this kind of high-stakes reliability, delivering battery isolators and voltage sensitive relays engineered for marine, emergency vehicle, work truck, and off-road environments where electrical failure simply isn't an option.

The XD Series: Award-Winning Relay Technology

The centerpiece of Egis Mobile Electric's battery isolation lineup is the XD Series — a family of relays that earned the prestigious IBEX Innovation Award in 2022. These aren't conventional relays. XD Series units can be configured via dip switches to function as a relay/battery disconnect, voltage sensing relay, or low voltage disconnect , giving installers a single, versatile platform for multiple applications. Remote ON/OFF/Auto inputs allow forced close or open operation, or fully automatic operation based on voltage sensing, with local and remote LED indicators per relay.

One of the most practical advantages of the XD Series is its footprint. An advanced bi-stable solenoid design delivers a 35–75% reduction in mounting space and product weight compared to common electrical system layouts — a significant benefit in tight marine or vehicle installations. The system is also expandable with Link and CrossLink Busbars to additional relays, supporting 2- or 3-battery systems with standard busbar interconnect accessories.

TH Series & Universal Voltage Sensing Relays

For applications that demand flexible battery management, Egis offers the TH3 Universal Voltage Sensing Relay. It can be installed as a time delay relay, battery management relay, low voltage disconnect, or simple relay, with on/off triggering via external ignition signal and/or alternator voltage sense and adjustable voltage trigger levels. This ensures dual-battery systems share charging power when available and isolate batteries when needed to protect starting or communications ability.

Automatic Charging Relays (ACRs)

Egis Mobile Electric's ACR lineup — exemplified by the 7610B — addresses one of the most common failure points in multi-battery systems: a drained start battery. The 7610B eliminates dead start batteries by sharing charging across two batteries and isolating them when no charge sources are present, all through a sealed, corrosion-resistant Deutsch/Amphenol DTM connector harness. Its ultra-low off-state current draw of just 1.3 mA compares favorably to typical ACRs that draw 7–10 mA — a meaningful advantage for vessels or vehicles that sit idle for extended periods. Adjustable on and off voltage settings allow the system to share start battery energy for an auxiliary battery while ensuring engine starting ability, with integrated thermal overload shutdown protection.

Built for Harsh Environments Across Multiple Markets

Egis Mobile Electric is dedicated to protecting the most critical and vulnerable aspects of mobile electrical systems, developing solutions for customers who demand the highest quality and reliability where consequences of failure are far greater than a simple inconvenience. Their battery isolators and VSRs serve marine, emergency and municipality fleet vehicles, and other specialty vehicles , with reliability and dependability engineered across wide temperature, vibration, and electrical system ranges.

Whether you're outfitting a patrol vessel, a work truck, or an off-road rig, Egis Mobile Electric's battery isolators and voltage sensitive relays offer a level of engineering depth that goes well beyond the basic solenoid. Explore the full Egis Mobile Electric brand catalog or browse all battery isolators and voltage sensitive relays to find the right solution for your system.