PriorityStart! 24 Volt ProMax Battery Protector HD (Heavy Duty)
Item #: 24V-PROMAX-HD   |    In Stock

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PriorityStart! 24 Volt ProMax Battery Protector HD (Heavy Duty)

Item #: 24V-PROMAX-HD   |  In Stock

Today's Price: $137.95
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Price: $137.95

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Free 2-Day Shipping
1 Year Factory Direct Warranty
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100% Compatibility
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Product Specifications for PriorityStart! 24 Volt ProMax Battery Protector HD (Heavy Duty)

BM Part #: 24V-PROMAX-HD
Voltage: 24 Volt
Length: 5"
Width: 3"
Height: 1.25"
Shipping Weight: 2.00Lbs
Warranty: 1 Year Factory Direct
Product Manual: Download
  • Handles over 1600 starting amps.
  • Handles approximately 400 continuous amps.
  • Disconnects at 23.6V; times out after approximately one (1) minute.
  • Reconnects with 0.2mV load change (brake pedal, light switch, etc.).
  • High intensity LED light indicates connect/disconnect status.
  • Temperature range: -40°F to +185°F.
  • This item is covered by the Replacement Only Return Policy.
  • PriorityStart! 24V ProMax H.D. provides even stronger Automatic battery protection for heavy duty vehicles and multiple accessory (2way/CB radios, radar, GPS dual batteries etc.) applications
  • Heavy duty increases on all internal components, circuitry and materials, providing greater strength and durability to a wider range of vehicles and applications
  • Designed to handle 1600 starting amps and up to 400 continuous amps providing heavier load capacity, Top high intensity LED indicates connect/disconnect mode
  • 20 Years Same proven technology Automatically Disconnects any drain on battery when engine is off, then Automatically Reconnects with small load change (put foot on brake pedal, operate light switch, etc.) Do-It- Yourself Install.
  • No buttons to push, no raising the hood, no remote to carry and no hard wiring no down time, no lost man hours, no damaged alternator or damaged electrical system. NO DEAD BATTERY!

Product Description

Free Standard Shipping!

Order today and receive free standard shipping on your PriorityStart! 24 Volt ProMax Battery Protector HD (Heavy Duty). Only valid in the contiguous 48 states and not valid with any other offer.

PriorityStart! a TOTALLY AUTOMATIC 24 volt Electro-Mechanical computerized on/off battery protection system 20 years proven technology. Simple Do-It-Yourself 3 easy step installation. Stops battery from going dead, preventing damage to battery, alternator, and electrical system (surge protection). Monitors battery voltage when the engine is off. If battery voltage drops below 23.6V (11.7V for the 12V model) for any reason, PriorityStart! Automatically Disconnects the drain, leaving starting power! To start the engine, simply operate brakes, lights, accessories, (bilge pump on boat) any small load change (0.2mV) and PriorityStart! Automatically Reconnects, you can start the engine. No raising the hood, No remote to carry, No button to push, No Dead Battery. PriorityStart! pays for itself first time it saves the battery. A dead battery costs time, money, and permanently damages the battery. Protect your battery's life and power with PriorityStart! See each model for more specifics.

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 farming, military, and international vehicles found outside the USA 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 will not charge or maintain a battery.

Have a question regarding use of this item? Contact PriorityStart! directly for installation or technical support. They can be reached at (800) 780-8276

View Parallel Dual Battery Installation Instructions

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.

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What our Customers are saying
24 volt Pro Max
July 5, 2023
by on July 5, 2023

Always had trouble with batteries on our Dredge. This has helped with batteries not discharging during idle periods. So far so good.

Would recommend to a friend?