Can you run the AC in your travel trailer while towing? The short answer is yes, but it requires careful planning and the right equipment. You’ll need a reliable power source, typically a generator, to provide the electricity the AC unit demands, and understanding the limitations of your setup is crucial for a safe and comfortable journey.
Understanding the Power Requirements
Running your RV’s air conditioner requires a significant amount of power, far more than your tow vehicle’s charging system can provide. This is why relying on a generator is the most common and practical solution. Before you even consider firing up your AC on the road, you need to determine the power demands of your unit.
Calculating AC Power Needs
Look for the AC unit’s specifications, typically located on a label either inside or outside the unit itself. Pay attention to the starting wattage and the running wattage. The starting wattage is the surge of power required when the AC first kicks on, and it’s substantially higher than the running wattage, which is the continuous power needed to keep it operating.
For example, a typical 13,500 BTU RV AC unit might have a starting wattage of 2,200 watts and a running wattage of 1,500 watts. This means your generator must be able to handle at least 2,200 watts initially, and then maintain 1,500 watts continuously. It’s always wise to add a buffer of around 20% to your calculations to account for fluctuations and other devices drawing power simultaneously.
Choosing the Right Generator
Selecting the appropriate generator is vital. Inverter generators are generally preferred over conventional generators for their cleaner power output and quieter operation. They produce a stable sine wave, which is essential for protecting sensitive electronics in your RV.
Consider the wattage rating of the generator. You need a generator that can comfortably handle the starting and running wattage of your AC, plus any other devices you might want to use while driving, such as lights, refrigerators, or charging phones. A generator with a continuous output of 3,000 watts should be sufficient for many smaller RVs with a single AC unit. Larger RVs with multiple AC units or higher power demands will require more powerful generators.
Setting Up Your Generator Safely
Safety is paramount when operating a generator, especially while towing. Exhaust fumes are deadly, so never operate a generator inside the travel trailer or enclosed space.
Proper Placement
The ideal location for your generator is on the tongue of your trailer, in the bed of your truck (if applicable and securely fastened), or on a specially designed generator platform that attaches to the trailer frame. Make sure the generator is securely strapped down to prevent movement during travel. It should also be positioned in a well-ventilated area to allow for proper cooling and to prevent the buildup of exhaust fumes.
Exhaust System Safety
Ensure the generator’s exhaust is directed away from the trailer and the tow vehicle. Consider using an exhaust extension kit to redirect the fumes further away. Regularly inspect the exhaust system for leaks or damage. Carbon monoxide detectors are a must inside the travel trailer, even when the generator is running outside.
Electrical Connections
Use a heavy-duty extension cord rated for outdoor use to connect the generator to your travel trailer’s shore power inlet. Make sure the extension cord is properly grounded and that all connections are secure. Avoid using multiple extension cords connected together, as this can create a fire hazard.
Optimizing AC Performance While Towing
Even with the right equipment, running your AC while towing can strain your electrical system. Here are some tips to optimize performance:
Pre-Cooling Your Trailer
Before hitting the road, cool down your travel trailer as much as possible. This will reduce the load on the AC unit when you start towing. Park in the shade and close the curtains or blinds to minimize heat gain.
Auxiliary Cooling Measures
Consider using other cooling methods in conjunction with your AC, such as portable fans or a swamp cooler. These can help circulate air and lower the temperature inside the trailer without drawing as much power.
Driving Habits
Reduce the strain on your generator by avoiding prolonged periods of idling in direct sunlight. If you need to stop, try to find a shaded area or pull into a rest stop where you can shut down the generator and let the trailer cool down naturally.
Frequently Asked Questions (FAQs)
FAQ 1: Can I use my tow vehicle’s alternator to power the AC?
No, your tow vehicle’s alternator typically does not produce enough power to run a travel trailer AC unit. While some vehicles have auxiliary alternators or upfitter switches, they are not designed for the continuous high amperage draw of an AC unit. Attempting to run the AC from the alternator could damage your vehicle’s electrical system.
FAQ 2: What size generator do I need for my RV AC?
The generator size depends on your AC unit’s wattage requirements. As a general rule, a 3,000-watt inverter generator is usually sufficient for a single 13,500 BTU AC unit. However, always check the starting and running wattage of your specific AC unit and add a safety margin of at least 20%. Consider future needs as well if you think you may add more devices.
FAQ 3: Is it safe to leave my generator running unattended while towing?
While it’s common practice, leaving your generator running unattended involves inherent risks. Regular monitoring of the generator, its placement, and exhaust system is essential for safety. Ensure you’ve addressed all safety precautions, including secure mounting, proper ventilation, and functional carbon monoxide detectors.
FAQ 4: What are the advantages of an inverter generator compared to a conventional generator?
Inverter generators offer several advantages: cleaner power output, quieter operation, and often better fuel efficiency. They produce a stable sine wave, which is crucial for protecting sensitive electronics in your RV. Conventional generators produce dirtier power, which can damage electronic devices.
FAQ 5: How often should I service my generator?
Generator service intervals depend on the manufacturer’s recommendations and how frequently you use it. Generally, you should change the oil every 100-200 hours of use and inspect the air filter, spark plug, and fuel lines regularly.
FAQ 6: Can I use a solar power system to run my AC while towing?
Solar power can supplement your generator’s output, but it’s unlikely to be sufficient to run your AC unit solely on solar, especially while towing. Solar panels generate power based on sunlight availability, which can be inconsistent while driving. Solar can help keep your batteries charged and reduce the load on your generator.
FAQ 7: What if my generator keeps tripping the breaker?
This usually indicates that you’re overloading the generator. Check the wattage of all devices you’re running simultaneously. You may need to reduce your power consumption or upgrade to a larger generator. Ensure all electrical connections are secure and that there are no shorts in your system.
FAQ 8: How can I reduce the noise from my generator while towing?
Inverter generators are generally quieter than conventional generators. You can also use a generator enclosure or sound dampening materials to reduce the noise. Position the generator as far away from the living area as possible. Consider investing in a quieter generator model specifically designed for RV use.
FAQ 9: Are there any legal restrictions on running a generator while towing?
Some states or municipalities may have regulations regarding generator use, including noise restrictions or restrictions on running generators in certain areas. Check local laws and regulations before traveling.
FAQ 10: How can I protect my RV’s electrical system from power surges?
Use a surge protector or electrical management system (EMS) to protect your RV’s electrical system from voltage fluctuations and power surges. These devices can detect and prevent damage from common electrical problems.
FAQ 11: What other appliances can I run at the same time as the AC?
This depends on the generator’s capacity and the wattage requirements of the other appliances. Carefully calculate the total wattage of all devices you plan to run simultaneously. Avoid running high-draw appliances like microwaves or electric water heaters at the same time as the AC.
FAQ 12: Is it more efficient to run the AC continuously or to turn it on and off?
It’s generally more efficient to run the AC continuously at a lower setting than to turn it on and off frequently. Frequent start-ups draw a significant amount of power and can be harder on the generator. Maintaining a consistent temperature requires less energy than constantly cooling down a hot trailer.