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There are plenty of ways to keep your RV cool when the sun is heating up your rig. Whether you’re boondocking off-grid in the desert or trying to keep your rig cool while hooked up with a 50 or 30 amp RV electrical system at an RV park (or “mooch-docking” in a friend’s driveway), you’ll have different goals and methods in mind for maintaining a comfortable RV.
We’ve learned that keeping ourselves cool is more important (and often easier) than keeping our entire RV cool – this can be done by sealing RV seams or going overboard with tarps on the roof, for instance (there will be more in this blog post about keeping ourselves cool later on).
As I write this, we’re dry camping at Tecolote Beach in Baja, Mexico (and in case you’re curious, you don’t have to speak Spanish to be able to RV in Baja, Mexico). It’s 80F today, and we aren’t hooked up to electricity to run our A/C (and we don’t travel with a generator). So, we’d like to offer you some tips on how we keep our RV cool that I hope will be helpful to you. We enjoy coming back to a cool RV after being out in the heat at the beach a few steps away from our front door.
Keeping our RV cool in Mexico
Not just tips for “How to keep an RV cool in summer”
These tips aren’t just for the sun in Baja or keeping an RV cool in the extreme heat temperatures of summer in the south. You might find yourself trying to keep your RV cool during a warm day in late spring in Arizona, during the middle of summer heat in the Midwest, or hoping for a glimpse of cool air during a heat wave in the fall near the Great Lakes.
Keeping an RV cool in extreme heat:
I hate to be the bearer of bad news, but RVs with 2-inch walls are not built to allow you to breed penguins while enjoying free dispersed camping in Southern California in July or August. If you’re RVing in the south during the summer, your RV will get hot (even if you’re hooked up to shore power and have your A/C on full blast).
Keeping your RV cool in extreme heat depends on how you define “cool” and “extreme heat.”
These tips will help you reduce the heat of your RV, but you have to understand that there are limitations to how an RV is meant to be used and have reasonable expectations.
We find it’s often better to focus on keeping yourself cool than to focus on trying to keep the RV cool. Going to the pool, working at a coffee shop, and drinking lots of ice water are great ways to stay cool, even if your RV feels hot.
Do RVs Have Air Conditioning?
Yes, RVs (since the 90s) have air conditioning, but your RV needs to be plugged into electricity to use it at a campground or someone’s driveway – very few RV Air Conditioners can be run off of solar power for extended periods of time.
RV air conditioners can usually lower and sustain the inside temperature by about 10-15F. (For example, if it’s 85F outside, you can reasonably expect to get your RV temperature to 75F inside).
How To Keep Your RV Cool In Summer Heat With These 17 Tips:
Park your RV in the shade (if possible)
This is a great solution if you’re in a full hookup site (or at least one with electric hookups to run your air conditioning). By parking in the shade, you will keep the afternoon sun from heating your RV, and as a result, your a/c will not have to work as hard to cool down your rig to a comfortable temperature.
If you’re camping on BLM land and depending on solar panels to power your rig, parking in the shade may keep your rig cool, but it will also limit the solar power or cause you to have no incoming solar power.
However, boondocking (what is boondocking?) in the shade can work for a few nights – your batteries may be sufficient to keep a fan running for a few days without feeding in additional solar power.
In our case, our solar panels are at the front (tongue) end of our travel trailer, so if we can plan the path of the sun, we can try to shade the back 2/3rds of our rig and leave the front 3rd exposed when the sun is at its highest and giving us the option to put in most power.
We usually fail at aiming for partial shade, but we always convince ourselves it’s an idea worth trying.
Usually, when we try this (south of the Grand Canyon, for instance, parked among the trees), we can get a couple of hours of direct sunlight, which is enough to slow down the drain on our batteries while still keeping most of our rig shaded.
Here at Playa Tecolote in Mexico, we’ve parked our RV out in the open, so shade isn’t an option for us (unless we wanted to be parked a little bit away from the beach in the shade of the mountain, which we decided against).
Put A Microwavable Bean Bag In The Freezer
This one might seem a bit unconventional – and a trick that won’t technically keep your RV cool, but beans (or rice, in our case, from our homemade microwaveable bags) hold cold just as well as heat.
Put that bean bag on your feet or in your lap after 20 minutes in the freezer, and it will start to cool your whole body. We’ve learned that staying cool is often essential to staying comfortable while RVing on hot summer days.
One time, our A/C stopped running (while we were mooch docking in a friend’s driveway), right when I was scheduled to record a LIVE video interview for Xantrex in our RV. While it was during the heat of the summer, and I had no A/C, I used my cooled bean bag (fresh out of the freezer) as a footstool to keep myself cool and comfortable while I worked.
Pull your RV window shades down
This might seem obvious, but stopping the sun from turning your rig into a greenhouse is a great way to stop the heat from getting into your rig. We also have to balance this with the shades blocking the cool breeze, which might be the best way to cool off our trailer.
Most of our windows open partially (the lower half or lower 3rd, for instance), so we pull the blinds down, covering the top portion of the window and leaving the section of the window that opens uncovered. This way, we are doing what we can to block most of the sun but can still have the window open enough to allow the breeze in.
Smart Window Orientation: Learn Where To Face Your RV
One side of your RV probably has more windows than the other. In our case, the driver’s side of our RV has a large bedroom window near the front, one near the rear, and large windows in the slide-out near the dinette and my office space (we took out the love seat and now can use that space as an RV office area).
Staying cool in my RV office workspace (where our loveseat used to be)
In the winter, while RVing in the desert, we’ll face this side of the rig southwest, so we get the sun moving east to west on the southern horizon and get lots of sun in these windows.
Keeping our RV shaded by positioning it in the desert
When we’re trying to keep the RV cool in the summer (or later into the spring when we’re looking to keep our camper cool on hot days), we park in the opposite direction so that the sun shines on the passenger side where we only have a small kitchen window and a small bedroom window.
You might have a large windshield at the front of your motorhome or a large picture window out the back of your fifth wheel, which changes the way you orient your RV.
Orientation isn’t always an option in an RV park – the campsites may all be facing a particular direction, or there may only be a few sites available for you to choose from. However, when you get the choice, or you’re camping on public land where you can face whatever direction you want to, keep your windows in mind based on the season.
Use An RV Awning For Shade on Hot Days
While we’re focusing on the direction to face your RV, remember that your awning helps shade the side of your RV from direct sunlight on the passenger side.
Unless it’s too windy, your awning can create an excellent sunblock, allowing you to sit outside to enjoy the breeze in the awning’s shade. You’ll also reduce the sun warming up the side of your RV or help to maintain a cooler temperature inside your RV while your air conditioning is running.
Keeping our RV cool with our awning opened while boondocking.
Additionally, you can add awnings above your slides that will automatically extend and retract with your slide to reduce the sun warming up the roof of your slide-out and have the added benefit of protecting against rain, branches, leaves, and bird droppings.
Get Even More Air Flowing To Keep Your RV Cool
We swapped out a skylight in our kitchen for a fantastic fan vent. Not only does it act as an extra ventilation method while cooking food, but it also creates airflow at a low volume.
To give you an example, while I’m sitting near an open window (in my office space, for instance), I can feel the difference in airflow from the window between having the fan on or off.
Keep your RV cool by using a ceiling vent to remove hot air
Because it’s a ceiling fan, it takes the warm air (since hot air rises) and pushes it out of the RV. This pulls in fresh air from the windows – not necessarily cooler air, but the air movement is always better when trying to cool off than having still air in your RV.
It’s also a reversible roof fan, so if our RV is filled with hot air when we get back at the end of the day (or if we forgot to open all of our RV windows while we were out during the afternoon on a sunny day), we can pull cool air down into the RV instead of trying to push hot air out.
We have a second vent in our bathroom, and we’ll often run that one as well with the door open to create additional airflow.
Use your RV roof vents to the fullest
Even if you don’t install a fan, having a skylight in your RV ceiling that can open will naturally let the warmest air out of your RV, which pulls cold air flow in through the windows.
Of course, if you’re hooked up to electricity, you’ll want to keep your roof vents and windows closed to keep the cooled air in while running your A/C.
Try to reduce the number of times you (or your kids) use the door – the biggest opening to let your cooled air out and the heat from outside in… someone please tell my kids this.
Cook Outdoors to Keep Your RV Camper Cool
We have an outdoor kitchen and outdoor grill that we cook with to keep our RV cool. Boiling pasta, BBQ (grilling), and frying foods outside allow us to keep the heat out of the RV (and the smell of onions and garlic, which are both seem to linger inside our rig for days afterward).
If you don’t have an outdoor kitchen, you can still grill outside, cook on the BBQ, or use an outdoor pizza oven on a picnic table. Another option for meals would be to eat sandwiches, salads, or charcuteries on the warmest days to avoid cooking altogether.
Keep your RV cool by cooking outside with a portable grill
Not a fan of grilling?
You can still use your instapot, air fryer, or slow cooker, but use an outdoor outlet (either on your RV or your power pedestal). Outdoor cooking allows an RV owner to create (and leave) that heat caused by cooking outside in summer temperatures.
Whenever Celine makes cookies, I try to convince her that it’s too hot to heat up the RV by cooking in the kitchen (even if it’s in the middle of winter). I’m a raw cookie dough fan, but I usually only get a few pieces of cookie dough before it’s baked into cookies.
Use Insulated Window Covers or Reflectix to Keep Your RV Cool
Insulated RV window covers (or Reflectix, which looks like silver bubble wrap) are a popular option for the most extreme heat situations.
Unlike blinds that allow the heat into the RV windows and then stop it from getting into the RV interior, window covers stop the heat from getting into the RV in the first place.
The downside is that they also block almost all light, which requires you to turn more lights on – not usually a heat-generating problem if you’re using LED lights, but it depends on your goals.
If you’re boondocking to enjoy the views, then covering your RV windows isn’t a great option (even if you put in the effort to take down the insulated covers every night).
Boondocking on BLM land in Kofa National Wildlife Refuge
If you’re trying to keep your RV cool while you go to work for the day or while you’re out hiking in high temperatures on BLM land, then insulated RV window covers might be a great option. When they are used along with an air conditioner, that can make a huge difference in your electrical usage.
Clean Your Camper Air Conditioning Filters and A/C Vents
Not only will dust-clogged filters stop the air from flowing freely through your A/C vents, but the dust can also get inside the RV air conditioner itself and inhibit its performance.
Dirty air conditioning fins and coils can cause the life of your A/C unit to be dramatically shortened, and if you think it’s hot now, wait until you have no A/C because your unit has died, and now you’re waiting on a backorder.
RV Air Conditioners are not cheap, so regular RV air conditioner maintenance can cost less than having to replace your RV’s A/C.
Test Your RV Air Conditioner In The Spring Before You Need It
Rather than waiting until you need to turn on your A/C unit for the season and then finding out it needs to be replaced, test it in the spring to be sure the fan is working and that the air is cooling.
This way, you’ll be ahead of everyone else who finds out at the beginning of the season that their unit needs to be replaced, and you won’t have to wait for back orders if a part or a technician is needed.
Do the same by testing your RV awning – better to find out everything is working before the hot weather arrives.
Portable Air Conditioners: Alternative Options For When You’re Hooked Up To An Electric Pedestal
Portable A/C units are an option if your built-in unit stops working or if you need a boost in your bedroom or a specific area of your hot RV. Keep in mind that some parks won’t allow additional A/C units because of the extra draw on the power.
In some cases, you won’t be able to run both your onboard A/C unit and a second air conditioner on 30-amp power (with everyone else in the park also pulling power for their A/C).
We haven’t tried the Bouge RV Portable Air Conditioner (primarily a ‘van life’ air conditioner), but we’ve heard some RVers swear by it.
Bouge Portable Air Conditioner – good for up to 54 sq ft or simply for blowing directly in your face.
Consider A Dehumidifier or Portable Fans Instead of a Portable Air Conditioner
We’ve found that a dehumidifier pulls less energy than an air conditioner, doesn’t need to be vented, and works well for taking the humidity out of the air.
Since your RV is a small space, removing the humidity is a simple task and makes a big difference in keeping your RV cool. Removing humid air may be as important as cool air.
If you’re not hooked up to power at an RV park, then you’re not using your onboard A/C and probably wouldn’t have enough energy to power a dehumidifier for hours daily. If this is the case for your situation, then portable fans are a great option.
Sometimes moving air, like a gentle breeze on a hot day, is a step closer to feeling cooler and requires less energy than generating cold air.
Insulators For RV Vent Fan And Skylight Vent Covers
RV skylight insulators are an option that we havemixed feelings about.
Lots of people use RV vent cover insulators (basically pillows) to block the light and heat from a vent. Unfortunately, it also blocks escaping heat from that vent and prevents cool air from getting in.
Reflectix RV vent insulator
In our first rig, we had a window vent in our kids’ bunk room. We found the insulator pillow helped block morning light or late afternoon sunsets in northern Canada, but when we were trying to cool our RV down, we would pull out the insulator pillow to vent the hot air out the ceiling.
In our current rig, the bunk room doesn’t have a window vent – something we’ve considered putting in – so we no longer use a skylight insulator in our rig.
Use LED Light Bulbs To Keep Your RV Cool
Incandescent light bulbs generate heat – enough that while we were renovating our first RV late into the evenings, we saw the light covers bubbling as they melted under the extended heat of the incandescent light bulbs – that being said, we had them on for 5-6 hours at a time from dusk until whenever that last coat of paint went on.
The benefit of using RV LED lights is a matter of scale. If you’re weekending in your RV and want to keep it cool, then maybe you can get by with flashlights or by only turning on one to two lights after dark for a couple of hours.
If you live fulltime in your RV like we do and want to be as efficient as possible with battery power usage to spend as much time off-grid as possible, or if you have kids who don’t remember to turn their lights off no matter how many times you lovingly remind them, then LED lights drastically reduce your power usage and the heat output.
There are a few different bulb styles available, so check what kind of bulbs your RV requires before ordering replacement LED lights for your RV.
LED lights produce less heat and are helpful in keeping your RV cool
Unplug Unneeded Appliances To Keep Your RV Cooler
While the power draw and heat output is minimal on your TV in standby mode, if you add up all of the small draws and small amounts of heat along with the breaker panel or inverter cycling to keep those power items running on standby, then turning them off when they aren’t needed can make some difference.
Consider your TV, microwave, night lights, outdoor kitchen fridge (if not storing additional food that must be cooled), and device chargers that aren’t in use.
Anything that has a clock or indicator light on it while not in use is still drawing power.
If it’s 80F outside and you’re trying to get your rig cooled to 75F, this probably isn’t going to make a difference. However, if you’re RVing in heat in Texas, Arizona, or Florida, for example, and you’re trying to get your rig from 104F down to ANYTHING in the 80s, then this extra power draw may help give you that competitive edge against the hot sun.
Get Out Of Your RV To Keep Cool
While not exactly a tip on keeping your camper cool, the goal is to keep both the RV and yourself cool. While it may not always be an option to keep your RV at 72F around the clock, you might consider some ways to stay cool yourself (during the heat of the day) and head back to enjoy your RV in the evening.
Make use of alternative locations for air conditioning
Visit a library, work at a coffee shop, go grocery shopping, go out to a movie, or eat out at a restaurant during the high heat of the afternoon on hot days.
Enjoy a Public Swimming Pool or an RV Park’s Pool:
This is one of our favorite options while we’re dry camping. A public swimming pool (indoor or outdoor) allows us to cool off, and they often have showers which allow all of us to shower without using any of our fresh water or filling up our grey tank.
If the RV park you are camping at has a pool, spend an afternoon there (even with just your toes in the water) to cool off.
Staying cool at an RV park pool in La Paz, Baja, Mexico
BONUS: (My favorite) Go to an ice cream shop!
Ok, it’s not a requirement to go out to an ice cream – you don’t even have to leave your rig – but how about you enjoy frozen yogurt or make a smoothie with frozen fruit or suck on frozen grapes or blueberries: Get something cool in you and drink plenty of water to feel better.
You might think this goes without saying, but being prepared for a hot day with some extra ice in the freezer or some frozen fruit can go a long way to helping you stay cool if you’re at the point where you are so hot you feel like you can’t think straight or make any decisions.
Plan for an upcoming heat wave, and store up some of your favorite frozen treats, fill up that ice cube tray, and stick a jug of water or freshly squeezed lemonade in the fridge to beat the heat.
If you’re RVing through the summer, you might also be planning to RV in the winter as you find the days are getting cooler. Here are some tips for RVing in the winter.
