12V-36V Dark Speed On The Run Dual Marine Charger

(2 Reviews)
$599.99

Free shipping

Millertech’s Dark Speed “on-the-run charger” will maximize your trolling motor run time by sending excess energy from your engine’s charging system, to your 36v trolling motor batteries!

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Description
  • INPUT VOLTAGE- 90-130V AC
  • AC POWER DRAW- 857W
  • OUTPUT VOLTAGE- 1 – 14.5V 15A
  • OUTPUT VOLTAGE- 2 – 42.6V 15A
  • START TRANSFER VOLTAGE- 14V
  • STOP TRANSFER VOLTAGE- 13.3V
  • WATERPROOF- IP65
  • DIMENSIONS- 10¾” x 7¾” x 3½”
  • WEIGHT- 13.8 lbs.

 

Dark Speed “On The Run” vs. traditional lithium battery charging methods

The Dark Speed “On The Run” charger offers a distinct advantage over traditional charging methods by allowing you to recharge your auxiliary lithium battery bank directly from your motors alternator while in motion plus diverting any extra power directly to your 24v or 36v battery.

Here’s a comparison to highlight the differences:

Charging speed and efficiency

  • Dark Speed “On The Run”: Enables fast and continuous charging of your whole lithium battery system while your vehicle is running. This eliminates downtime associated with traditional charging methods and keeps your equipment ready for extended use.
  • Traditional Chargers: Often require longer charging times since no power is being distributed throughout the day.

 Power source and convenience

  • Dark Speed “On The Run”: Utilizes your vehicle’s alternator as the power source, providing convenient and fast charging whenever your on the move. This eliminates the need for daily shore power hookups, generators, or external power sources.
  • Traditional Chargers: Rely on external power sources like shore power, generators, or separate charging units often limiting your day on the water to 10 or less hours. 

 Flexibility and freedom

  • Dark Speed “On The Run”: Offers unparalleled freedom and flexibility, letting you stay out on the water longer without worrying about power depletion. You’re no longer tethered to a fixed power source.
  • Traditional Chargers: Can be restrictive, requiring you to dock at a marina or use a generator for daily recharging limiting your autonomy.

Never lose power on the water again with the revolutionary Dark Speed “On The Run” Lithium Battery Charger. Designed for the modern adventurer, this charger lets you seamlessly power your essential equipment directly from your vehicle’s alternator.

Unleash Uninterrupted Power

  • Charge While You Cruise: The Dark Speed “On The Run” charger efficiently harnesses the power of your motors alternator to charge your auxiliary lithium battery bank. Say goodbye to waiting at the dock or having to find a power outlet – keep your trolling motors, fish finders, and other gear powered up even while in motion.
  • Smart & Automatic Charging: Equipped with an integrated smart battery monitoring system, this charger prioritizes your starting battery, ensuring it’s always ready to get you going. Once your starting battery reaches optimal charge, the system intelligently diverts the alternator’s power to your auxiliary battery, converting it to the correct voltage for your 24V or 36V system.
  • Lithium Battery Wake-Up: The innovative design of the Dark Speed charger can automatically “wake up” a completely depleted lithium battery’s BMS (Battery Management System), allowing it to begin charging without any extra steps from the user, {Plug and Play}

Engineered for Performance and Durability

  • Marine-Grade Waterproof Construction: Built to withstand the harshest environments, the charger features a rugged and waterproof design, making it ideal for marine and outdoor applications.
  • Built-in Protection Features: Enjoy peace of mind knowing the Dark Speed charger is equipped with multiple safety mechanisms to protect both your batteries and the charger itself. These include protection against low voltage, over-temperature, and over-voltage situations.
  • Fast & Efficient Charging: The advanced charging algorithms ensure optimal battery health and extend the lifespan of your lithium batteries. For example, the 36V version can fully charge a 36V 60Ah battery in under 4 hours.

Experience the Freedom of “On The Run” Power

The Dark Speed “On The Run” Lithium Battery Charger is more than just a charger – it’s a commitment to uninterrupted adventure. Take control of your power, extend your time on the water, and enjoy the confidence that comes with knowing your batteries are always ready for action.

THE MILLERTECH® MARINE CHARGER 3 YEAR GUARANTEED WARRANTY IS SIMPLE!

TERMS:
From the date of your charger purchase through year number 3 of ownership, your charger is covered. If it stops working during this time, we will repair or replace it with a charger of equal or greater value for FREE!

SHIPPING:
We cover all shipping costs associated with shuttling your charger back and forth for repair or replacement. It is our warranty; it is our cost; not yours.

EXCLUSIONS:
There are NONE! You trusted Millertech®, and if it’s within the warranty period your Millertech® charger is completely covered for everything!

PROOF OF PURCHASE:
You don’t need one. If its Millertech®, it’s covered!

Customer Reviews

Rusty Trancygier
Rating: 5/5
Great quality!
12V-36V Dark Speed On The Run Dual Marine Charger
Mon Nov 03 2025 14:55:22 GMT+0000 (Coordinated Universal Time)
John McAllister
Rating: 5/5
12V-36V Dark Speed On The Run Dual Marine Charger
I purchased the 12V-36V Dark Speed On The Run Dual Marine Charger along with two 36v 60 amp batteries and a 12v 190 amp battery. After using the trolling for the majority of the day, the Dark Speed Charger kept the 36v batteries charged at mid-90% charge by transferring charge from the 12v, as required. Having the needed power was not a concern as the Miller Tech app on my phone kept me informed of the battery charge status throughout the day. I have 100% confidence in the Dark Speed Charger and Miller Tech stands firmly behind their products, just read their warranty. Thank you for great products at a reasonable price!
Fri Jan 10 2025 05:00:00 GMT+0000 (Coordinated Universal Time)

What the pros are saying about Millertech batteries