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.
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.
!
BUILTTOLAST
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 technologyReal Stories from Real Boaters
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 |
| Energy 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) |
| Recharge Time | >30 seconds |
| Operating Temperature | -40°F to 149°F (-40°C to 65°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.