PriorityStart 12 Volt ProMax HD - Electronic Cut Off Switch [12V-PROMAX-HD] for Sale


When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Price: $129.95

Current models include LED light.

Easy to Attach!
  1. Connect your existing vehicle positive cable to PriorityStart!
  2. Attach the PriorityStart! cable to your battery\'s positive post
  3. Attach the ground wire to the battery\'s negative post

Specially designed for Law Enforcement, Fleets, Utility, Emergency, and Security vehicles with multiple accessories. PriorityStart! is an automatic computerized on/off “switching” system protecting battery voltage and starting power. If battery voltage drains below 11.7 volts when engine is off, it automatically disconnects the load. The battery voltage immediately recovers. TO START: just step on brake pedal, starting power is automatically reconnected. Designed to handle 1600 “starting amps”.

Often multiple accessories mimic “engine run”. The PriorityStart! is specially designed to handle multiple accessory loads, utilizing higher value electrical components to monitor “engine run” when the engine is off.

PriorityStart! is successfully being used in vehicles with:

  • 2 way/CB radios
  • Radar Systems
  • GPS
  • Cell phones
  • Computers
  • Flashlight Chargers
  • Mobile Equipment
  • Dual batteries
  • Hi-Amp Stereo Systems
  • Mobile T.V

PriorityStart! is an electronic cut off switch. It willnotcharge or maintain a battery.

What improvements does the PriorityStart! HD have over the original 12V-PROMAX?
  1. 1600 Starting Amps, 400 Continuous Amps.
  2. Contact disk upgrades:
    • Contact disk approximately 60% area increase for more load carrying capability.
    • Spline gear and holding nut increased approximately 60% providing heavier load carrying capability, thus decreasing strain and stress.
  3. Jack screw increased approximately 40% to provide heavier load carrying capability.
  4. Busses increased approximately 30% to provide more load carrying capability.
  5. Ground wire connector thicker and stronger allowing use on heavier vehicles.
  6. Top post contact material increased and raised to improve new GM connections.
  7. Gear cover protects from outside debris, the single solid cover is strong and durable and suppresses normal gear noise.
  8. Motor cover protects from outside debris, the single solid cover is strong and durable.
  9. High intensity LED light, moved to top of unit.
  10. Redesigned circuit board, with room for future expansion.


Parts Search:


Follow