Electric Outboard Motor Battery
Electric Outboard Motor Battery Manufacturer In China
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What is an electric outboard motor battery?

Electric Outboard Motor Battery is a battery pack that provides a power source for kayaks, small boats, and fishing boats. The battery is used to provide energy for the string outboard to ensure sufficient power source in the ocean, lake, and river. keheng as an Electric Outboard Motor Battery manufacturer not only provides lithium battery packs for Electric Outboard motors but also provides customized battery packs for fish finders and trolling motors.

Featured Products For String Outboard Motor Battery

Trusted Electric Outboard Motors Manufacturer

Keheng has more than 15 years of experience in the lithium battery industry. Our products are certified by international standards such as MSDS, UN38.3, CE, UL, KC, BIS, CB, and ISO9001:2015 so that our products can comply with the usage standards. This allows our electric propulsion systems to be adapted to the needs of all types of rowers, rather than requiring rowers to succumb to the limitations of a specific battery system.

Electric Boat Motors Lithium Battery Appliance

Choose keheng lithium battery to make your sailing experience better!

Keheng provides lithium battery solutions for marine propulsion, offering 12V to 72V outboard motor systems to boat builders, leisure craft brands, and marine equipment buyers. Our batteries use high‑energy‑density materials and intelligent BMS, reducing weight, extending range, and enhancing overall performance, with high protection for humid marine environments. For sailboats, fishing boats, small craft, and electric water products, we deliver customized capacity, voltage, size, and functional options. This helps clients build efficient, long‑lasting electric propulsion systems that improve user experience and market competitiveness.
Keheng lithium battery for outboard motor
Choose keheng lithium battery to make your sailing experience better!

As a manufacturer of electric outboard batteries, we offer energy-customized solutions for outboard manufacturers:

  1. Voltage customization: according to the use of string outboard power customized 12.8V, 25.6V, 36V, 51.2V, and other compatible string outboard voltage.
  2. Capacity customization: Keheng can design 100Ah, 200Ah, and 500Ah lithium battery packs according to the time you want to use them.
  3. Special function customization: the battery can be connected to LCD, Bluetooth, high rate, and other functions.
  4. shape customization: whether you need prismatic, round, square, or irregular shapes can be found in Keheng corresponding solutions.
Not just electric outboard motor battery

We not only provide rechargeable lithium battery packs for electric outboard motor batteries, but also widely used in kayak propulsion, fish finder, trolling motors and other on-water fields. We provide 5 years warranty for the batteries to ensure the benefit of our customers. Meanwhile, we have absolute competitive price to provide one-stop solution for your string outboard!

Not just electric outboard motor battery

Contact keheng for an electric outboard motor battery catalog!

What types of string outboards are there?

Gasoline Outboards

Gasoline outboards use diesel or gasoline as fuel and can have an impact on the waters.

Electric Propulsion

Marine Outboard

Electric boat propellers usually use batteries, while most people are still using lead-acid batteries as a power source, which is inconvenient to use due to their heavier weight. So lithium batteries have obvious advantages in the field of string outboards, she is not only lightweight, small in size, and high energy density the perfect choice for limited space.

What voltage battery pack should I choose for my thruster?

Usually, manufacturers will use the 12-24V battery as the standard voltage of the thruster, when choosing the matching battery, you need to consider not only the voltage but also the capacity, waterproof, BMS, and other features so that you can protect the battery will not make the battery life reduced due to external or internal factors.

Benefits of lithium batteries for outboards
  1. Save space
    We all know that the space on an inflatable boat is very small, and it takes a lot of space to use lead-acid batteries. As lithium batteries have the characteristics of small size, the use of lithium batteries for marine outboard propulsion can save space.
  2. Increase speed
    Suitable for marine outboards using lead-acid batteries, the capacity is not less than 60 amps, weighing up to 30 kilograms. And lithium batteries 60 amp only 6-7 kilograms or so, greatly reducing the carrying capacity of the boat, the speed is naturally accelerated.
  3. long life
    Lead-acid batteries can be charged and discharged cycle life of 150 times -300 times and generally can be used for 1-2 years, while the lithium battery charging and discharging cycle life of up to 2000 times, can be used for more than 5 years.
  4. High power
    Lithium batteries have a high power tolerance, in which the lithium iron phosphate lithium-ion batteries for electric outboards can reach 15-30C charge and discharge capacity, to facilitate high-intensity startup acceleration.
  5. Wide temperature range
    Lithium batteries are highly adaptable to high and low temperatures and can be used in a -20℃ -60℃ environment, and can be used in a -45℃ environment after the process.
  6. High energy density
    Lithium battery energy ratio is high, with high storage energy density, has reached 460-600Wh/kg, and is about 6-7 times of lead-acid batteries.
Propulsion lithium battery series connection recommendation

Are you considering, in the end, the use of the ternary lithium 6 series (6 ternary lithium battery cell series for 18-25.6V lithium battery pack) or ternary lithium 7 series (7 ternary lithium battery cell for 21-29.4V lithium battery pack)?

  1. The higher the voltage, the faster the speed (it is recommended that in the water current turbulence, the main propulsion to use, the distance is recommended to choose the 7 series of lithium battery cell).
  2. The efficiency of the power use (according to the minimum). Use voltage to determine the use of the lithium battery pack, if 12V-24V can be used for propulsion, then you can choose 6 strings of lithium battery pack, if the minimum voltage of 22V propulsion then you need to choose not less than 22V voltage lithium battery pack).
  3. Consider the weight and size, using more cells, the size and weight will increase.
  4. Cost, the more the cost of the battery cell is higher. So it is recommended to choose the corresponding lithium battery pack according to your needs first.
Which batteries are suitable and unsuitable for string machines?

Applicable

  • Gel batteries
  • Absorbent Glass Matte (AGM)
  • Lead-acid batteries
  • Hydrogen batteries
  • Lithium-ion batteries

Unsuitable：

  • Nickel-cadmium batteries cannot be used for long periods due to their short lifespan.
  • Sodium batteries (still in the R&D stage, less viable in commerce)
  • Liquid flow batteries are not suitable for use in string outboards or high power equipment due to their low efficiency.
How to configure the power propulsion system with the size of the boat?
  • For dinghies under 5 meters, inflatable boats, and small sailboats under 7 meters, are generally suitable for outboards with 1 kW thrust.
  • 6 to 9 meters Roadster, fishing boats, small cleaning boats, small sightseeing boats, etc., suitable for 3 to 6 kW thrust outboards.
  • 9 to 15 meters business boat, cleaning boat, large sightseeing boat, etc., generally suitable for 10 to 25 kW thrust outboards.
  • 18 to less than 18 meters business boats, yachts, mono/catamaran sailing boats, etc., generally suitable for 10 to 40 kW thrust inboards.
  • 18 to 30-meter work boats, fishing boats, ferry boats, medium and large sailing boats, etc., are generally suitable for inboard engines with 100 kW thrust.
How to choose the corresponding battery capacity according to the power system?

For example: if you have a 24-volt thruster, you need to find the running power in the user manual: e.g. 500w at full power operation, then the consumed power is 500/ 24 ≈ 20Amps, and different Amps for different power. The formula is: power (W) divided by voltage (V) = Amps

You have a 24V thruster that runs at 500w, the power consumption is 500/ 24= 20Amps, and if you want it to run for 5 hours, then you need a 20*5=100Ah Li-ion Battery Pack.

The battery formula can also be used if we use Watts and Watt-hours instead of Amps and Amp-hours. The answer stays the same. The formula is Needed battery (in Wh) = Watt (W) * Desired Sailing Time (in hours)

Your propulsion is usually running at 50% and you want the run time to be at least 5 hours, at 50% the motor is 240W, at this point you need the Needed battery (in Wh) = 240 (Wattage consumed by the motor) x 5 (Desired run time), you will need a 24-volt battery pack of at least 240 x 5 = 1200W!

Why is a LiFePO4 lithium battery for electric outboards considered safer for marine use?
The olivine crystal structure of Lithium Iron Phosphate (LFP) is extremely stable. It does not easily catch fire or explode due to internal short circuits or overcharging. Furthermore, the current thermal runaway behavior of LFP manifests as smoking and slow expansion, rather than violent combustion or explosion. This provides you with ample emergency response time.
What is the best battery for a boat electric motor?
When purchasing a battery for an electric outboard motor, prioritize “safety” first. Then, comprehensively consider the vessel’s unique operating environment, range requirements, and total cost of ownership. Lithium Iron Phosphate (LFP) batteries have become the standard answer for the vast majority of electric boats. They offer an ultra-long lifespan of up to 3000-5000 cycles and high energy density for lighter weight. Additionally, marine battery packs employ multi-layer sealing and anti-corrosion treatment, making them better suited for harsh marine environments.
How do I choose the right battery box for my electric outboard motor?
First, you need to ensure the battery box matches the battery’s size and voltage for it to function properly. The size and position of the cable exit ports on the box must accommodate your battery cables. Second, the marine environment is damp and exposed to water splash, with salt spray corrosion in seawater. Therefore, the enclosure must utilize waterproof and corrosion-resistant construction and be capable of secure, vibration-resistant mounting. Finally, consider safety and heat dissipation. The water surface is exposed to direct sunlight, so the box must facilitate timely heat dissipation to prevent high temperatures from inducing thermal runaway.
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