Soft Start for RV AC: How to Install and Why You Need It

If you are an RVer like me, you know that keeping your air conditioning running efficiently can be a challenge—especially when moochdocking or relying on a generator. Moochdocking is when you park your RV on a friend or family member’s property and use their utilities—typically with their permission but without the full hookups of a paid campsite. It is a great way to stay connected with loved ones while cutting costs, but it can present power limitations, especially when running high-energy appliances like an air conditioner.

I spent last summer moochdocking in the Okanagan, BC, and I am heading to Mexico this winter. Keeping my RV cool without constantly tripping breakers or overloading my power source became a priority. That is when I discovered the soft start for RV AC, and it has been a game-changer.

What Is a Soft Start for RV AC?

A soft start is a small device installed in your RV’s air conditioning unit that reduces the surge of power needed when the compressor starts. Instead of demanding a huge burst of electricity, it gradually increases the voltage, preventing your AC from tripping breakers or overloading your generator.

Key Benefits of a Soft Start for RV Air Conditioners

• Prevents Breaker Trips: Reduces the power spike when starting up your AC.

• Easier on Generators: Allows you to run your AC on a smaller generator without overload.

• Quieter Operation: Eliminates that loud 'kick' sound when the compressor starts.

• Lower Energy Consumption: Helps reduce power bills when plugged into shore power.

Why Does My RV AC Trip the Breaker After Running for a Few Minutes?

Many RVers experience a frustrating issue where their air conditioner runs fine at first but then trips the breaker after a few minutes. This often happens because the compressor or fan cycles back on, causing a sudden spike in power demand. While the initial startup of the AC unit requires a lot of power, the secondary surges when the compressor restarts can overload the breaker—especially if your RV is plugged into a household outlet or running on a small generator.

How a Soft Start for RV AC Fixes This Issue

A soft start device smooths out power surges by gradually ramping up voltage instead of demanding an abrupt, high-power draw. This not only prevents breakers from tripping mid-cycle, but it also protects your generator from overload. If you have been dealing with a breaker tripping after your AC runs for a few minutes, installing a soft start could be the best solution to keep your system running smoothly.

Additionally, the folks at Soft Start are readily available for troubleshooting and can even provide a video call walkthrough to guide you through the installation process. Their support makes installation straightforward, even if you are not experienced with electrical work.

My Moochdocking AC Nightmare

When I parked my RV in my parents’ driveway last summer, I thought a decent extension cord would be enough to keep my AC running smoothly. I was wrong. Every time the air conditioner kicked on, it tripped the house breaker. After multiple trips to reset it, I knew I needed a solution. That is when I decided to install a soft start for my RV AC.

If you are traveling through remote areas, it is also a good idea to ensure you have reliable power sources to keep your essential appliances running.

Installing a Soft Start for RV AC: My Experience

I was initially intimidated by the installation process. I am comfortable with RV maintenance, but electrical work can be daunting. Thankfully, the company I purchased from offered a live video chat to guide me through the installation. It was surprisingly easy, and if you are not confident with wiring, you can always hire a professional.

Watch a similar installation here.

Installation Steps:

1. Turn off the power to your RV AC unit.

2. Open the AC cover and locate the compressor wires.

3. Connect the soft start unit according to the manufacturer’s instructions.

4. Secure all wires and close the AC unit.

5. Test the AC to ensure the installation is successful.

The Results: More Cooling, Less Hassle

Once the soft start was installed, the difference was immediate. My AC ran smoothly without tripping the breaker, and it was noticeably quieter. Even better, by the end of the summer, my parents saw a drop in their electric bill since the AC was no longer pulling excess power.

For those who live full-time on the road, it is also important to prepare for unexpected challenges. Read about surviving a wind storm in a van and how I handled extreme weather conditions.

Next Project: Soft Start for My Camper Van

After seeing how well it worked in my RV, I am now installing a soft start in my camper van. I will be spending the summer Moochdocking in the Okanagan heat, and running my AC is a must. A soft start will allow me to keep cool without overloading my generator.

If you are traveling to warmer climates, check out my guide to Cabo Pulmo—a beautiful off-grid destination with excellent snorkeling and diving spots.

Final Thoughts

A soft start for RV AC is an essential upgrade if you:

✔ Moochdock frequently and do not want to trip house breakers.
✔ Want to run your AC on a small generator without issues.
✔ Need a quieter and more efficient cooling system.
✔ Want to lower your power consumption and energy costs.

If you are looking for other ways to make van life easier, I highly recommend checking out my RV heater blog post—we have advice for every season.

The upfront investment pays off with improved versatility, quieter operation, and longer AC life. If you are struggling with RV AC power issues, a soft start is worth considering.