Charles® - Battery Isolator

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Product Details

Charles Accessories

Battery Isolator by Charles®. Battery Banks: 3. All Charles Battery Isolators are ignition protected. They feature a heat chamber design, protective boots on heavy-duty 5/16" battery and alternator studs, corrosion-resistant casings, are compact and easy to install. Either leg of the Charles Battery Isolator handles the entire alternator output amperage rather than a portion of the rated load. Made in the USA.



Banks: 3


  • Engineered to high standards
  • High-grade design delivers extended lifespan
  • Made with premium materials

When charging multiple battery banks, Charles suggests connecting a battery isolator between the charger and the batteries. Battery isolators isolate charge current and stop it from recirculating, thus preventing one battery from discharging into a lesser charged battery. When properly installed within the system, the alternator remains connected to the batteries at all times, eliminating the possibility of damage to the diodes. Charles Battery Isolators are built to be robust, with either leg of the isolator handling the entire alternator output amperage rather than a portion of the rated load. Please note that by inserting a battery isolator into the system, a voltage drop of approximately 0.7 to 1.5 DC, depending on the charge current, will occur.

Founded in 1968, Charles® is a privately-held, diversified manufacturing and technology company with corporate headquarters in Rolling Meadows, Illinois and five U.S. manufacturing centers. Charles sells quality products, services and innovative solutions to telecommunications, utility, government, marine, and industrial markets worldwide. Charles is proud of its Midwest manufacturing roots that position it to effectively compete in an ever-changing marketplace.

Warranty Information

CHARLES MARINE PRODUCTS warrants the products will be free from defects in materials and workmanship which cause mechanical failure, as set forth in the Limited Warranty. Review this warranty carefully for information on what is covered by its terms. Complete and return the warranty registration card within ten (10) days of purchase to establish proof of ownership and validate the warranty coverage. Customer must provide notice of any alleged defect in material of workmanship within thirty (30) days of discovering the problem, and within the warranty period.


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