Havis Battery Insulator

Havis Battery Insulators: Professional-Grade Power Protection for Working Vehicles

When a fleet vehicle, law enforcement cruiser, or heavy-duty work truck depends on rock-solid electrical reliability, battery management isn't optional — it's mission-critical. Havis, a manufacturer with roots going back to 1928 and over 80 years of experience equipping public safety and fleet vehicles, brings that same professional-grade engineering philosophy to its line of battery insulators.

What Makes Havis Battery Insulators Stand Out

Havis battery insulators are purpose-built for dual-battery vehicle configurations common in fleet, emergency, and commercial applications. Havis battery isolators allow dual batteries to be charged from a single power source such as an alternator or battery charger, and due to the isolator's ability to pass current in only one direction, your first battery can be discharged without draining power from the second battery. This one-way current flow is the cornerstone of protecting a vehicle's starting battery while auxiliary electronics — laptops, radios, lighting, and other mission-critical gear — draw from a secondary source.

Havis offers Schottky-diode-based dual battery isolators at multiple amp ratings, including a 75 Amp Schottky Dual Battery Isolator and a 140 Amp Schottky Dual Battery Isolator , giving installers and fleet managers the flexibility to match the isolator's capacity to the vehicle's total electrical load. Schottky diodes are favored in these applications for their low forward voltage drop, which minimizes power loss and heat generation during charging cycles — an important consideration in enclosed engine bays and upfitted fleet vehicles.

Built Into a Broader Power Management Ecosystem

With minimal maintenance and care, Havis Isolator and Equalizer products assure many years of trouble-free service. The battery isolator is designed as part of a broader Havis power management ecosystem. Havis power management solutions protect valuable equipment while reducing fuel and maintenance costs, keeping you on-task and with power no matter where your work takes you. Complementary products in the Havis lineup include DC-to-AC inverters, battery equalizers, battery chargers, and DC converters — all engineered to work together in demanding in-vehicle environments.

The company focuses on product durability, and its mounting and docking equipment is made to support and withstand the rugged, unpredictable environment of a squad car, with materials supporting ballistic shock, ingress protection, mil-spec connectors, salt spray, and many other extreme environmental conditions. That same durability philosophy carries through to every power management component Havis produces.

Who Relies on Havis Battery Insulators

Typical installation applications include transit buses, private coaches, tour and charter coaches, heavy trucks, boats, and solar power systems. Whether you're upfitting a police patrol vehicle, a utility work truck, or a transit coach that can't afford unexpected power failures, a Havis battery insulator provides the electrical separation needed to keep the starting battery healthy and the auxiliary systems running independently.

For anyone building out a reliable dual-battery system in a professional vehicle, Havis delivers the combination of proven Schottky technology, broad amp-rating options, and an integrated power management ecosystem that serious installers and fleet managers have trusted for decades. Browse all battery insulators or explore the full Havis product catalog to find the right fit for your application.