How Many Watts Does an RV AC Use to Run Normally?

How many watts does an RV AC use to run normally? Most RV air conditioners run from 11,000 – 15,000 BTUs, thus, using about 1000 – 1700 watts.

In fact, the size and type of your RV determine the watts the AC requires. Also, your AC’s amp, voltage, and BTU are critical factors in its energy requirements. Read further as this guide helps determine how many watts your RV AC uses.

How Many Watts an RV AC Uses

Three methods can give you the wattage your RV air conditioner uses.

1. Determine the size and type of your RV

The amount of space your AC requires to cool can determine its wattage capacity.

Different types of RVs and their sizes have their own AC power requirement due to their interior.

Your RV type lets you know the amount of space its air conditioner unit needs to cool. Here are the various RV class and their average dimensions in length.

2. Use a watt meter

An easy and accurate method of knowing your camper’s AC wattage is through a plug-in meter. These devices measure the energy transfer between an appliance and an outlet. You can also read your RV AC amp draw better with a meter.

Plug a watt meter into your RV outlet. Turn off the lights and other appliances connected to your RV’s power grid while your air conditioner runs.

3. Converting the BTU cooling output

Every RV Dometic air conditioner has a yellow energy guide sticker that contains a unit’s energy efficiency ratio or EER and its capacity rated in BTU., or a British thermal unit is your AC’s cooling output. At the same time, EER is the unit’s energy.

Use this formula to get the running wattage of your AC based on its BTU and EER value:

British thermal unit rate (BTU) / energy efficiency ratio (EER) = Running Wattage (W)

Example: If your RV AC energy guide sticker tells you your unit has a capacity of 13500 BTU and 12 EER, we can calculate the wattage with this formula:

13500 (BTU) / 12 (EER) = RV AC Unit Wattage (W)

1,125 = RV AC Unit Wattage (W)

You can also get the power requirement of your AC with this RV wattage chart based on its BTUs.

While the wattage chart is a rough estimate of the power usage of your RV AC, it can give you a good grasp on how much electricity it can use while it is on.

Below is an RV amp usage chart based on the BTU rate to show you the accuracy of the two early charts.

Calculating the amp and volt on the chart shows you how close the second BTU chart is, showing you how many watts to run your RV AC.

How to Calculate the RV AC Powers

Find the running wattage of your RV AC in its manual or labels. If you cannot find the wattage of your AC, look for the voltage and amp instead to find the power requirement of your unit.

Use this formula to get the power requirement of your camper’s AC:

Amp (A) x Volt (V) = Power (Wattage)

12(A) x 120(V) = Power (Wattage)

1440 = Power (Wattage)

Wattage is the power your camper AC uses while it is turned on.

You can use this data to know how much energy your air conditioner uses at specific times with this formula:

Power (Wattage) x Time (hours) = Energy (Wattage/hour)

1440 (Wattage) x 6 (hours) = Energy (Wattage/hour)

8,640 = Energy (Wattage/hour)

Frequently Asked Questions

Why should you know your RV AC watt and voltage requirements?

Knowing your air conditioner’s power usage lets you know if your power generator or solar power lithium batteries are enough for a single trip. A clear grasp of how much electricity you need for your AC also helps you know if you need more power for other RV appliances.

What average amps does a RV AC use?

A standard RV air conditioner unit draws around 11 to 16 amperages. On the other hand, modern campers have energy-efficient air conditioning units that draw lesser amps than the average.

Will a 3000-watt inverter run an RV Air conditioner?

A 3000-watt inverter can power most camper’s air conditioner units since it is rated to deliver 3000 watts. Always consider that you have a higher watt rating than your RV AC running wattage to prevent power issues.

Is there a difference between starting and running wattage of an RV AC?

Starting wattage is the amount of power an RV AC draws to turn on, while the running wattage is the power it uses during operation. A 13500 – 15000 BTU RV AC tends to have a starting wattage of 6000-7000 watts.

What is the generator size I need to run your RV AC?

Use the running wattage of your RV AC to determine the appropriate generator for the unit. The generator must supply enough power to handle your air conditioner’s startup wattage. RV ACs with large BTUs likely require generators that produce higher total wattages.

Conclusion

There are three ways to know how many watts an RV AC uses. One of these methods includes going through the manual and its specifications label. You can also use your air conditioner’s BTU and EER to calculate power requirements.

You can find the appropriate power generator or solar battery to provide sufficient power to keep your outdoor trip comfortable when you know your RV AC is running wattage.

Read more: Reasons why my RV AC breaker keep tripping.

Philip Lopez

Okay, so I’m Philip Lopez. I join Riverside Trailer as an editor, where I will be doing research for both content and reviews. I contribute to studies aimed at understanding the most typical problems encountered by RVers on the road. I also keep up with the newest RVing gadget innovations so that I can promptly evaluate and recommend the best options.