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Automatic Battery Isolator/Combiners



Save Money; Enjoy added Security

Achieve Battery Isolation with:

  • Efficiently achieve the fastest charge rates for your RV deep cycle battery banks

  • Detect poor battery connections early (before your battery is damaged due to an extended undercharged condition)

  • Avoid expensive tows due to a  weak or dead starting battery.

  • Operate trailer accessories without disconnecting from tow vehicle.

  • Extend the useful life of your starting batteries with starting power confidence.

  • Have backup starting power while in the boondocks.

  • Enjoy starting boost power during cold weather.

  • Simplify and automate your dual or triple battery charging system on your marine watercraft.

  • Automatic Charging of two or more batteries.

  • High Output Alternators (even 300+Amp)

  • Self Jump Starting capability (Backup battery setup).

  • Backup Starting and Operating.

  • Batteries of different age or type.

  • Very Low Resistance Solid State Switching (no diode effect).

  • Limiting of inrush current; No more stuck or welded relay contacts!

  • Significantly Less Power Dissipation than diode isolators.

  • Less mounting space required.

  • Battery/Charging system monitoring indication.


We offer battery isolator/combiners, available in two models.   These are no ordinary isolators or combiners!   In addition to automatic combination when charge voltage is available, they have the ability to combine the batteries with a small remote switch as well as provide diagnostic information on your battery system via a remote LED.   Check out all the links and learn about batteries, charging, starting, isolation, voltage drops, installation tips etc...

Click here to Learn why you should choose a Hellroaring Isolator/Combiner!

Note: The BIC-95150B and BIC-95300B are our most current versions.  Previous models are the BIC-75150, BIC-75150A, BIC-85150A, BIC-85300A, BIC-95150A, and BIC-95300A These "A" models have used an external sense resistor and TVS diodes mounted externally on the terminals.  These current versions are form, fit, and function identical except they are more thermally efficient with lower ON resistances, and therefore have higher current handling capabilities.  These "B" models have taken it a step further with built-in Sense Resistor and Transient Suppression, for the simplest and cleanest installations.

Battery Isolator/Combiner, models BIC-95150B and BIC-95300B have become the most popular versions. Simply put, the BIC-95150B is for either the Auxilary battery setup or the Start side isolation method and the BIC-95300B is for the Backup battery setup.

The legacy model, BIC-95300A is a bit more versatile because it can be configured for any of the three setups mentioned above. But, this flexibility comes at the expense of mounting a few components on the BIC terminals (a TVS, Sense resistor, and possibly an external diode if using a Remote switch.) So, it's install is not as simple nor as clean as the "B" versions. So, this is a good choice for those who know they want the Hellroaring BIC product, but don't know what setup they want to use, or if they think that they may want to re-configure to a different setup at a later date. The BIC-95150A also uses these external components for the ability to use external sensing over a long input run. But, most applications do not need this, and the option favors the BIC-95150B.   They are ideal for the following applications:
Tow vehicle and trailer three battery system configured with:
  • Starting Battery

  • Vehicle Backup battery with no loads connected to it.

  • Deep Cycle Trailer or camper battery

  • The Hellroaring BIC-95300B for the Backup battery and the BIC-95150B for the trailer or camper battery.

4 x 4 vehicle configured with:
  • Starting Battery

  • Backup Battery

  • Winch system and or Off road lighting.

  • Hellroaring BIC-95300B with Remote Module, and 1 or 2 FS-150A fuse sets.

Hunting Vehicle (Pickup, SUV - Sport Utility Vehicle) equipped with:
  • Starting Battery

  • Emergency Start Backup Battery

  • Hellroaring BIC-95300B with Remote Module, and 1 or 2 FS-150A fuse sets.

Vehicle with Super Audio System configured with:
  • Starting Battery

  • Deep Cycle Auxiliary Battery for long play and or high power audio

  • Hellroaring BIC-95300A, BIC-95300B, or BIC-95150B depending on configuration.

Marine Watercraft - Boats configured with:

Camper applications configured with:
  • Start Battery
  • Deep Cycle Auxiliary Battery for camper loads
  • Hellroaring BIC-95150B with 2 CB-50A breakers (one breaker at each battery end)
And many others! Contact us below to ask about your specific application.




Contact Information

For General Information, Sales, Technical or Customer Support:

Telephone: 406-883-3801
Postal address: P.O. Box 1521, Polson, MT 59860
Electronic mail: sales23@hellroaring.com
Sales/Pricing info: Sales page

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We have the utmost respect for your privacy.  We do not collect information from you other than that required for us to conduct business and communicate with you.   We do not sell, share, nor distribute any information or addresses collected from you.  We do not create nor use mass mailing lists.  We communicate with you one to one and utilize Phone or voice mail if necessary and e-mail.   We do not use automated, time consuming, non-personalized phone systems.  We ask for and obtain your permission prior to using any communication quoted in our marketing information. 

Send mail to sales23@hellroaring.com with your orders, questions, or comments.

Copyright 1998-2023    Hellroaring Technologies, inc.
Last modified: 10-31-2023