NEVER GET STRANDED AGAIN

NEVER GET
STRANDED

AGAIN

Your engine starts instantly—even with a completely dead battery. No jump-start. No stress. Just confidence on the water.

PEACE OF MIND ON EVERY ADVENTURE

Instant Start Power

Delivers massive cranking power in seconds, even when your battery can’t light a dashboard bulb.

Always Ready

Holds its charge for months. Your boat sits all winter? BoatStartPlus is ready when you are.

Set It & Forget It

Automatically charges during normal use. No maintenance, no monitoring, no worry.

Built for Marine Life

Engineered to handle saltwater, temperature extremes, and the demanding marine environment.

The End of Dead Battery Anxiety

Every boater knows the feeling—that moment of dread when you turn the key and nothing happens. You’re anchored in your favorite spot, miles from help, with a completely dead battery. BoatStartPlus™ eliminates that fear forever.

This isn’t another battery. It’s a supercapacitor engine starting system that works along side your existing starting or house battery, delivering instant power when you need it most—guaranteed.

Advanced Supercapacitor Technology

WHAT
IT IS

A supercapacitor energy storage system that delivers massive cranking power instantly. Unlike batteries, it stores energy in capacitor cells—not through chemical reactions that will fail.

WHAT
DOES IT
DO

Provides up to 42kW of starting power, enough to crank engines up to 7 liters. Recharges completely in 30 seconds from any 12V source. Works in any weather, any temperature.

BUILT
TO
LAST

Engineered for over 1 million start cycles—that’s 50+ years of weekend boating. Often outlasts the boat itself.

3-Year Full Warranty

Because we stand behind our technology

Real Stories from Real Boaters about our KBi System

I couldn't be more pleased with the supercapacitor and the support provided by Kold-Ban in planning and executing the installation... It started the engine three times on it own with the battery disconnected! The ability to recharge the capacitor from almost any 12 volt source, if necessary, gives me an added sense of security

Like all KBi supercapacitors, it is designed to augment and assist - rather than take the place of - a starting battery. Its boost considerably lightens the load of the existing starting battery, thereby extending its life... Unlike a battery, the KSM's service life is virtually unlimited.

.. I have switched to the KrankingKART MiniHD in all of our boats. With the 90 second recharge, we never have to worry about getting on site with a dead jump box... Logistically, it's been great for us. We can plan better, because we know we have capabilities beyond a traditional jump box. Anything I can do to make the experience quicker for our customers is a win in my book.

KBi's KSM is simple to install, and it's designed to last forever. As simple as is purpose may be, KBi's KSM is truly amazing. I'm shocked nobody came up with this sooner, as it's only a matter of time before every boat has one.

Would you like to put in a good word for BoatStartPlus or any of KBi System products? Submit it here!

Trusted by Commercial Fleets Nationwide

Kold-Ban International (KBI) has been the trusted engine starting solution for commercial trucking and transit bus fleets for decades. When a city bus absolutely must start—in New York winters, Texas summers, or anywhere in between—they rely on KBI supercapacitor technology.

Now we’ve brought that same proven reliability to the marine world. BoatStartPlus is commercial-grade technology, sized and optimized for recreational boaters.

Made in the USA with a legacy of never letting customers down when it matters most.

BoatStartPlus™ Product Specification

Specification	Value
Power Output	42.05 kW maximum
Operating Voltage	7-14.5 Volts DC
Capacitance	240F (Farad)
Internal Resistance	0.0026 Ohms
Cycle Life	>1,000,000 cycles
Emergy Storage	19.4 kJ (operating window)
Recharge Time	>30 seconds
Operating Temperature	-40°F to 149°F (-40°C to 65°C)
Dimensions	14.25” × 10.25” × 6.25
Weight	8 lbs (3.62 kg)

Key Features

Works with lead-acid and lithium battery systems
No maintenance required
Automatic charging during engine operation
Emergency start button for deeply discharged batteries
Twin engine applications

Specification	Value
Engine Compatibility	Up to 7L displacement
Installation Distance	Up to 20 feet from engine
Mounting	Any orientation
Voltage Limits	15V max, 0V min
Current Leakage	4.5mA @ 15V
Storage Temperature	-40°F to 158°F (-40°C to 70°C)
Warranty	3 years (supercapacitor module)
	1 year (other components)
Origin	Made in USA

Need More Power?

If your boat requires more than 7L engine capacity, Kold-Ban offers larger supercapacitor systems designed for commercial vessels and bigger recreational boats. From workboats to yachts, we have the right starting solution for your needs.

About Kold-Ban International

For decades, Kold-Ban International has been the trusted name in engine starting solutions for commercial fleets, transit systems, and heavy-duty applications. From Northern winters to desert heat, our supercapacitor technology ensures reliable starts when failure isn’t an option. BoatStartPlus brings that same proven reliability to the marine market—commercial-grade performance, sized for recreational boaters.