Can You Power a Trolling Motor with a Generator? A Comprehensive Guide

Trolling motors are invaluable for anglers and boaters who need precise boat control. But what if you want to extend your time on the water without the weight of extra batteries? The idea of using a generator to power a trolling motor has been around for a while and this article explores the possibilities, challenges, and safety considerations involved.

The Allure of Generator-Powered Trolling Motors

Traditional trolling motors rely on battery power, which can be limiting on longer trips. Generators offer a continuous power source, freeing you from battery life concerns. The concept is simple: a generator provides electricity to either directly power the trolling motor or charge the battery while you're using the motor.

Benefits of using a generator:

• Extended run time: Say goodbye to the anxiety of running out of battery power.
• Reduced battery weight: Less reliance on multiple heavy batteries.
• Versatility: Generators can also power other onboard electronics.

Sizing Your Generator: What You Need to Know

Before diving in, you need to determine the appropriate generator size for your trolling motor. This depends on the motor's thrust and voltage requirements.

• Determine the voltage: Most trolling motors use 12V, 24V, or 36V systems.
• Calculate amperage draw: Check the motor's specifications or use a multimeter to measure the current draw at different speeds.
• Choose a generator with sufficient wattage: Ensure the generator's continuous wattage output exceeds the trolling motor's power consumption. For example, a trolling motor drawing 30 amps at 12V requires at least 360 watts.

Remember to factor in a buffer for other devices or any surge power requirements.

Setting Up Your Generator-Powered Trolling Motor

There are a few ways to approach this setup:

1. Direct Connection: If your generator has a 12V output with sufficient amperage, you can connect it directly to the trolling motor. However, most generators have limited 12V output, which doesn't supply enough power for the trolling motor.
2. Battery Charging: A common method involves using the generator to charge a deep-cycle battery while you're using the trolling motor. This requires a compatible battery charger.
3. AC-to-DC Converter: Use a generator with a higher-voltage AC outlet and pair it with a power supply or battery charger to step down into the required DC voltage for the trolling motor.

Potential Problems and Solutions

While the idea has merit, some users have raised concerns about a generator's ability to consistently supply the necessary amperage. Here are some elements one should also consider:

Safety First: Addressing Carbon Monoxide Concerns

One of the biggest concerns is carbon monoxide (CO) exposure. Generators produce CO, a colorless and odorless gas that can be deadly.

• Proper Ventilation: Ensure the generator exhaust is directed away from the boat and occupants.
• CO Detectors: Install carbon monoxide detectors on board to provide an early warning.
• Generator Placement: Position the generator as high as possible, preferably above the gunnels, with the exhaust pointed outwards.

Noise and Vibration

Generators can be noisy, which can disrupt the peace and quiet of being on the water and potentially scare away fish.

• Inverter Generators: Opt for an inverter generator, known for being quieter and producing cleaner power than conventional generators. Honda's EU series is a popular choice for its quiet operation and reliability.
• Sound Dampening: Use sound-dampening materials around the generator to minimize noise.
• Vibration Isolation: Mount the generator on vibration-isolating pads to reduce vibrations transmitted to the boat.

Efficiency and Fuel Consumption

Generators consume fuel, adding to your operating costs.

• Select an Efficient Generator: Choose a generator with good fuel efficiency.
• Run at Optimal Load: Avoid running the generator at full throttle when not needed.
• Consider a Sinewave Inverter Generator: Quieter, with better fuel economy than a standard generator.

Alternatives to Generator Power

Before committing to a generator, consider these alternatives:

• High-Capacity Batteries: Invest in high-amp-hour batteries designed for extended use.
• Solar Charging: Use solar panels to supplement battery power. This is an eco-friendly and silent option.
• Kicker Motor: Many boaters opt for a small, quiet four-stroke kicker motor as an alternative to a trolling motor.

Conclusion

Powering a trolling motor with a generator is technically feasible, but it requires careful planning and execution. Understanding the power requirements of your trolling motor, choosing the right generator, and implementing proper safety measures are essential. While generators can extend your time on the water, alternatives like high-capacity batteries or solar charging might offer a simpler, quieter, and more environmentally friendly solution.