Run Your RV AC Longer: The Right Generator Size for Your Needs

Enjoying the comforts of home while on the road is a key part of the RV lifestyle. Air conditioning is often high on that comfort list, especially during those hot summer months. But keeping your RV AC running requires power, and that's where your generator comes in. Choosing the right generator size is crucial to ensuring you can run your AC comfortably for extended periods without worrying about power outages or damaging your equipment. This guide will help you determine the correct generator size for your RV air conditioner and maximize your camping enjoyment.

Understanding RV AC Power Requirements

Before diving into generator sizes, it's essential to understand the power demands of your RV air conditioner. This information is typically found on a sticker located on the AC unit itself. Look for the following crucial details:

• Amperage (Amps): This indicates the amount of electrical current the AC draws.
• Voltage (Volts): Most RV AC units operate on 120V.
• Starting Watts (Surge Watts): This is the initial power surge the AC needs to start up. It's significantly higher than the running wattage.
• Running Watts: This represents the continuous power needed to keep the AC running once it's started.

Important Note: The running watts are usually lower than the starting watts. Your generator needs to handle both – the surge at startup and the continuous power to keep it running.

What Size Generator Do I Need to Run My RV Air Conditioner?

The general rule of thumb is to choose a generator with at least twice the running wattage of your air conditioner. This accounts for the significant starting wattage and provides a safety margin to prevent overloading the generator. However, several factors influence this:

• Other Appliances: If you plan to run other appliances simultaneously (like a microwave, refrigerator, or lights), you'll need a larger generator to handle the combined load.
• Inverter vs. Conventional Generators: Inverter generators are more fuel-efficient and quieter, but often have lower peak power output compared to conventional generators. If you opt for an inverter generator, ensure its surge capacity meets your AC's starting wattage requirements.
• Future Upgrades: Consider potential future additions to your RV (like a larger AC unit or more appliances). Choosing a slightly larger generator initially can save you money and hassle in the long run.

How to Calculate the Right Generator Size

Let's break down a practical example:

Suppose your RV AC unit has the following specifications:

• Running Watts: 1500W
• Starting Watts: 3000W

Following the rule of thumb, you'd need a generator with at least 3000W (twice the running wattage). However, to account for the starting surge and potential simultaneous appliance use, a 4000W to 5000W generator would be a safer bet.

Frequently Asked Questions (FAQs)

Can I run my RV AC on a smaller generator?

While technically possible with a smaller generator for short bursts, this is highly discouraged. It can lead to frequent power outages, damage your generator, and potentially harm your air conditioner.

What type of generator is best for RV air conditioning?

Both inverter and conventional generators can power RV ACs. Inverter generators offer greater fuel efficiency and quieter operation, but they might require a larger model to handle the surge wattage. Conventional generators are generally more powerful but can be noisier and less fuel-efficient.

How long can I run my RV AC on a generator?

The runtime depends on the generator's fuel capacity and the AC unit's power consumption. Larger generators with larger fuel tanks will offer longer runtime. Always check your generator's specifications for runtime estimates under different loads.

What happens if I use a generator that's too small?

Using a generator that's too small can lead to frequent shutdowns, damage to your generator or AC unit, and a significant reduction in your camping enjoyment. You may also experience voltage drops that affect your electronics.

Should I consider a generator with a transfer switch?

A transfer switch is a valuable investment for ensuring safe and efficient power management when using a generator. It automatically switches between shore power and generator power, preventing backfeeding that could damage your RV's electrical system.

Choosing the right generator size is crucial for ensuring the comfort and reliability of your RV’s air conditioning system. By carefully considering your AC unit's power requirements and other potential loads, you can select a generator that meets your needs and enhances your RV camping experience. Remember to always consult the specifications of both your AC unit and generator for accurate wattage requirements and safe operation.