Finding the perfect source of traction for a boat today often leads to electricity. Powerful electric motor on the boat It ceased to be the lot only of quiet fishing on karsh, becoming a full-fledged alternative to ICE. Modern technologies have allowed to create units that can plane with a boat on board and confidently resist the wind and flow.
But choosing the equipment is not just about buying the engine itself, but you have to solve the difficult task of choosing the engine. traction-battery Errors in the planning phase can lead to the desired speed being reached for only 15 minutes, after which the discharge occurs.
In this article, we will take a closer look at the technical details needed to successfully electrify your boat or PVC boat, and you will learn about the real thrust metrics, installation features, and hidden challenges that beginners face.
Criteria for the selection of traction electric motor
The first thing to pay attention to is the declared thrust, measured in pounds (lbs).to plane a small boat with a fisherman and equipment will require a unit with a force of at least 80-100 lbs. Weak models, designed for 30-40 lbs, are only suitable for quiet movement on standing water without getting on plane.
The second critical parameter is the operating voltage of the system. Powerful electric motors They're typically 24 or 36 volts, and this reduces the current in the circuit, reducing the heating of the wires and the loss of energy, and using a 12 volt system to power a motor would require huge currents, which is inefficient and dangerous.
Also worth considering is the design of the datawit and the ability to lift it. In shallow water or when passing through overgrown areas, maneuverability is important. Many modern models are equipped with telescopic rumples and rotary mechanisms that simplify control.
- 🔋 Traction: For planing, you need from 80 lbs and above.
- ⚡ Voltage: 24V or 36V to reduce current load.
- 🌊 Defense: Reverse and protection from overgrowth of the screw.
Don't chase for maximum power without considering the capabilities of your boat. Too heavy engine will upset the balance of the boat, especially if we are talking about inflatable models. The optimal weight of the engine for a PVC boat with a length of 3.6-4.2 meters is 15-20 kg, which allows you to maintain stability.
Calculation of the power system and choice of battery
The heart of any electric boat is a battery pack. A conventional starter battery in a car isn't going to work here, it's not designed to give you long-term low-current energy. You need specialized power. tractor Deep Cycle (Deep Cycle)
There are three main types of batteries: lead-acid (AGM/GEL), lithium-iron-phosphate (LiFePO4) and lithium-ion. Lead batteries are cheap but heavy and lose capacity in the cold. Lithium analogues are 3-4 times lighter, have stable voltage returns, but require a BMS (battery management system) and cost more.
To calculate the required capacity, use the formula: Current (A) × Time (h) = Capacity (A·h). A powerful full-thrust motor can consume from 40 to 60 Amps at 36 volts. Therefore, for 4 hours of active fishing, you will need a battery with a capacity of about 200 A·h.
⚠️ Warning: When lithium batteries are used in winter, it is strictly forbidden to charge them at negative temperatures without first warming up, which can lead to irreversible damage to the cells and failure of the BMS.
It's important to get the balance right between weight and capacity. A 200 Ah lead battery will weigh about 60 kg, which can be critical for a light boat. A lithium equivalent of the same capacity will pull just 20-22 kg, significantly improving driving performance.
| Type of AKB | Weight (roughly) | Duration of service (cycles) | Price. |
|---|---|---|---|
| AGM/GEL | 60-65 kg | 400-600 | Low. |
| LiFePO4 | 20-25 kg | 2000-5000 | High. |
| Li-Ion (NMC) | 18-22 kg | 1000-1500 | Medium/High |
Always keep 20% of your battery capacity. A deep discharge to zero reduces the life of any battery, especially lead batteries.
Technical features of installation on the boat
Electrical traction installation requires careful preparation. Focus on the mounting of the tranny bracket. Vibration and tear load during plane is great, so only use certified fasteners and locks.
For currents of 50-60 Amps, thin wires will cause a voltage drop and strong heating. Use copper cables with a cross section of at least 16-25 mm2 (depending on the length of the route). All connections must be reliably pressurized and protected from moisture by thermal shrinkage.
Battery locations also play a role: They should be placed as low and close as possible to the diametric plane of the boat to improve stability. Battery boxes should be airtight and have ventilation, especially if lead batteries are used to emit gases when charging.
- 🔧 Fastening: Use the bolts of the strength class not lower than 8.8.
- 💧 Defense: All contacts are treated with silicone lubrication.
- 📏 Length: Try to minimize the length of the power wires.
If you're putting the motor on a transom, make sure the datawite is submerged in water to a sufficient depth. Cavitation drastically reduces efficiency and can damage the blades. Adjust the angle of inclination depending on the load of the boat.
☑️ Check before the first launch
Comparison with gasoline analogues
The eternal argument is: electric or gasoline? Gasoline engines win in fuel consumption and fueling speed. In 5 minutes, you can fill the tank and swim another 100 kilometers. electric motors They give what the ICE does not have – absolute silence and no vibrations.
The economic aspect is also important: the cost of a kilometer of electricity is 5-7 times lower than gasoline if you charge from the home network, and electric motors do not require changing oil, filters and candles, which reduces operating costs.
The noise of a gasoline engine often scares fish away, especially in quiet weather or shallow water, and the electric unit allows you to sneak up on the fish park invisibly, an advantage that spinning and trolling masters value highly.
Hidden costs of a gasoline engine
In addition to the price of fuel, the owner of the ICE spends annually on winter preservation, changing the oil in the gearbox and engine, buying candles and filters.
But you can't ignore the range limits, because if you're going 50 kilometers one way, the electric motor will require a huge, heavy and expensive battery fleet, and in those cases, gasoline is the best choice.
Operation in different conditions: wind and flow
Motor power is especially important when driving against wind or current. A weak unit may not be able to handle the load and the boat will lose control. When choosing, consider that water resistance increases exponentially with increasing speed.
In high winds, a boat with a large sail (high boards, awning) will drift. The electric motor must have a power reserve to compensate for this demolition. turbo-accelerationThe scaling system available in some models helps to quickly overcome the critical area.
In winter, the efficiency of any battery drops. Lead batteries can lose up to 40% of their capacity at around 0°C. Lithium batteries are more stable, but they also require careful care. Keep the batteries warm before going to water.
⚠️ Warning: Don't try to reach maximum speed against a strong wave. This puts a tremendous strain on the dataset and can cause gear gears to break or the veneers to be cut off.
When driving overgrown bodies of water, it is important to have a special protective casing on the screw or the ability to instantly lift the datawitt. Wrapping grass on the shaft can block the screw and cause the windings of the engine to overheat.
A power reserve of 20-30% above the design minus is necessary to confidently overcome the headwind and current, as well as to compensate for the reduction in battery capacity over time.
Service and extension
Electric motors are reliable, but they require prevention. After each saline foray, the device must be thoroughly washed with fresh water, and salt causes metal parts to corrosion and contact oxidation, which can lead to short circuits.
Check the odulcs and seals regularly. Water entering the datawitt is a common cause of winding failure. Change the oil in the gearbox according to manufacturer's regulations, usually once a season or every 100 motor hours.
Batteries also need care. Lead batteries can't be stored discharged -- they sulfate and lose capacity. Lithium batteries are best stored when charged 50-70% in a cool room.
- 🧼 Washing: It is required after each release to salt water.
- 🔋 Charging: Use only smart chargers.
- 🔍 Inspection: Check the screw for cracks and chips.
Timely maintenance will avoid costly repairs, and even small scratches on a data sheet should be painted with anti-corrosion paint to prevent rust from developing.
FAQ: Frequently asked questions
Will the electric motor bring the boat to the plane?
Yes, a powerful electric motor (from 80-100 lbs) is capable of bringing a lightweight PVC boat or an aluminum Kazanka with one or two passengers to the plane, but for heavy boats, electric power may not be enough for confident planing.
How long does the traction battery charge?
Charging time depends on the battery capacity and the power of the charger. a lead battery with a capacity of 200 Ah standard charger (10-15 A) will charge about 12-15 hours. Lithium batteries can be charged with high currents, reducing the time to 3-5 hours.
Can I use an electric motor in winter?
You can use it, but with limitations. The mechanical part of the motor works fine, but the battery capacity drops in the cold. Lithium batteries can't be charged in the cold, they need to be put into the heat. Lead batteries are less sensitive to cold when discharged, but they also lose capacity.
Do I need to register a boat with an electric motor?
In Russia, boats weighing less than 200 kg and an engine powering less than 8 kW (about 10.8 hp) are not subject to registration in GIMS. Most electric motors meet these standards, but always check the technical data sheet of a particular device.