Yes, you can run the air conditioner in your travel trailer while driving, but doing so safely and effectively requires understanding the power source limitations and implementing the right setup. While it offers welcome relief from the heat, simply assuming your AC will work is a recipe for disappointment and potential equipment damage.
Powering the AC: The Core Challenge
The primary challenge lies in providing sufficient power to the AC unit. Most travel trailer AC units are designed to run on 120V AC power, typically supplied by shore power at a campsite or a generator. Your tow vehicle primarily operates on 12V DC power, and converting this to run a power-hungry AC unit requires careful consideration.
Power Source Options: Pros and Cons
Generator Power
- Pros: This is the most common and often the most reliable method. Portable generators, specifically those designed for RV use, can supply the necessary 120V AC power. Generators provide a robust and consistent power source, capable of handling the AC unit’s starting and running demands.
- Cons: Generators can be noisy, require fuel, and contribute to air pollution. Some campgrounds have restrictions on generator use, and they can be bulky and require storage space. You’ll also need to ensure the generator’s wattage is sufficient for your AC unit and any other appliances you plan to use simultaneously.
Inverter Power
- Pros: Inverters convert 12V DC power from your tow vehicle’s alternator (or a separate battery bank dedicated for this purpose) into 120V AC power. This eliminates the need for a noisy generator and is a more environmentally friendly option.
- Cons: Running an AC unit solely on an inverter powered by your vehicle’s alternator is usually impractical. The draw on the alternator is immense, potentially leading to damage to the alternator, overheating, and decreased fuel efficiency. Even with a heavy-duty alternator, maintaining sufficient power can be challenging. Using a dedicated battery bank with a powerful inverter is feasible, but requires a significant upfront investment in batteries, inverter, and potentially solar charging to keep the batteries topped off. The size of the inverter is also crucial; it needs to handle the AC unit’s surge wattage during startup.
Specialized DC Air Conditioners
- Pros: These AC units are specifically designed to run directly on 12V or 24V DC power, eliminating the need for an inverter. They are typically smaller and more efficient than traditional 120V AC units.
- Cons: DC air conditioners are generally less powerful than standard AC units, providing more localized cooling. They can be expensive and may require modifications to your travel trailer’s electrical system. Installation may be more complex.
Safety Considerations
Safety is paramount when running any electrical appliance while driving. Improper wiring, insufficient power, or overloaded circuits can lead to fire hazards and equipment damage.
- Use a Professional: Consult with a qualified RV technician to ensure your electrical system is properly set up and safe.
- Monitor Temperatures: Keep an eye on the generator or inverter’s temperature and the performance of your alternator to prevent overheating.
- Secure Equipment: Ensure the generator or battery bank is securely mounted to prevent movement during travel.
- Inspect Wiring: Regularly inspect all wiring and connections for signs of wear or damage.
Is It Worth It? Weighing the Pros and Cons
The decision to run your AC while driving involves weighing the benefits of a cooler trailer against the cost, complexity, and potential risks. Consider the following:
- Trip Length: For shorter trips, the effort and expense may not be justified.
- Climate: In extremely hot climates, the comfort and safety benefits may outweigh the drawbacks.
- Budget: The cost of a generator, inverter, batteries, or DC air conditioner can be significant.
- Personal Preference: Some people are more tolerant of heat than others.
Frequently Asked Questions (FAQs)
FAQ 1: What size generator do I need to run my travel trailer AC?
You’ll need a generator with enough wattage to handle the AC unit’s starting wattage (the surge when it initially turns on) and the running wattage (the power required to keep it running). Consult your AC unit’s specifications. Typically, a generator with 3000 starting watts and 2000 running watts should suffice for a standard 13,500 BTU RV air conditioner. Always err on the side of caution and choose a slightly larger generator to avoid overloading it.
FAQ 2: Can I use my car’s cigarette lighter to power an inverter for the AC?
Absolutely not. The cigarette lighter (12V accessory outlet) in your vehicle is not designed to handle the high amperage required to run an inverter large enough to power an AC unit. Attempting to do so will likely blow a fuse, damage your vehicle’s electrical system, or even start a fire.
FAQ 3: Is it safe to run a generator inside my travel trailer?
No! Running a generator inside your travel trailer is extremely dangerous due to the risk of carbon monoxide poisoning. Generators should only be operated outdoors in a well-ventilated area. Keep the generator away from windows and doors to prevent fumes from entering the trailer.
FAQ 4: Will running the AC while driving drain my tow vehicle’s battery?
Yes, if you are attempting to power the AC via an inverter connected to your tow vehicle’s starting battery. This is generally not recommended as it can drain the battery and leave you stranded. Using a separate battery bank charged by the alternator is a safer approach, but still puts a significant strain on the vehicle’s electrical system.
FAQ 5: How can I reduce the power consumption of my AC unit?
Several strategies can help reduce the AC’s power consumption:
- Park in the shade: This reduces the heat load on the trailer.
- Use window coverings: Reflective window coverings block sunlight and heat.
- Clean the AC filters: Dirty filters restrict airflow and reduce efficiency.
- Ensure proper insulation: Adequate insulation keeps the trailer cooler.
- Use a fan: A fan helps circulate the cool air and reduces the need for the AC to run continuously.
FAQ 6: Can I use solar panels to power my travel trailer AC while driving?
Solar panels can supplement the power supply, but they are unlikely to provide enough power to run the AC unit continuously, especially on cloudy days. Solar panels can help keep a battery bank charged, which can then be used to power an inverter. However, a substantial solar array is needed to make a significant difference.
FAQ 7: What is the best type of generator for running my RV AC?
Inverter generators are generally preferred for RV use. They are quieter, more fuel-efficient, and produce cleaner power than traditional generators, which is important for sensitive electronics. Look for a model specifically designed for RV use with sufficient starting and running wattage.
FAQ 8: What is a soft start capacitor and why is it important?
A soft start capacitor reduces the AC unit’s starting current (the surge when it initially turns on). This makes it easier to run the AC on a smaller generator or inverter, as it reduces the peak power demand. It’s a valuable upgrade for RVers who want to use their AC with limited power resources.
FAQ 9: Can I add a second AC unit to my travel trailer and run them both while driving?
Adding a second AC unit significantly increases the power demand. Running two AC units while driving would require a very large generator or a substantial battery bank and inverter system. It’s generally not practical unless you have a large tow vehicle with a very robust electrical system and are prepared for the increased fuel consumption and noise.
FAQ 10: Are there any 12V AC alternatives that are more efficient?
While true 12V AC units offering the same cooling power as standard 120V ACs are rare, there are evaporative coolers and portable DC air conditioners. Evaporative coolers, also known as swamp coolers, are more efficient but work best in dry climates. Portable DC air conditioners offer localized cooling and consume less power, but they may not be as effective in cooling the entire trailer.
FAQ 11: What is the difference between BTU and wattage when it comes to AC units?
BTU (British Thermal Unit) measures the cooling capacity of the AC unit – how much heat it can remove per hour. Wattage measures the electrical power the AC unit consumes. A higher BTU rating means more cooling power, but it also generally means higher wattage consumption.
FAQ 12: What are some tips for keeping my travel trailer cool without running the AC constantly while driving?
- Start early: Begin your drive early in the morning before the temperature rises.
- Ventilation: Open windows and roof vents to create airflow.
- Reflective window coverings: Use reflective shades or window film to block sunlight.
- Park in the shade during stops: Avoid parking in direct sunlight when taking breaks.
- Portable fans: Use portable fans to circulate air.
- Consider a swamp cooler: In dry climates, a swamp cooler can provide effective cooling without the high power consumption of an AC.
By understanding the power requirements, safety considerations, and alternative cooling strategies, you can make an informed decision about whether running your AC while driving is the right choice for you and your travel trailer.