One of the most concerns of RV travelers who have begun to stray from established campsites has to do with energy usage. They’re always worried about running out of battery power, a version of the “range anxiety” that owners of electric cars often have.
That’s a legitimate concern, because once the batteries run out of juice, everything in the trailer goes off: refrigerator (even when running on propane), heat, light, water pressure … even the hitch jack won’t go up or down anymore. If it happens to you, you won’t forget it.
It’s a pretty traumatic experience to have the entire trailer—your home and security—go dead.
The battery life problem is two-fold. First, many owners really have no idea of how much power they are using at any given time (the built-in battery monitor is pretty inaccurate). Second, the batteries typically have just enough capacity for an overnight or a weekend if you aren’t running the furnace a lot.
Airstream provides those batteries because most people don’t use their trailer away from shore power for longer than a night or two. Yes, despite all the discussions about “boondocking” you may have seen online, and all the blogs written by hard-core off-the-grid travelers, the reality is that most travel trailers go straight to a campground and get plugged in. Problem solved.
Boondockers require more. After a while, a minority of owners start to pine for something more in their travel experience, and that inevitably leads them to the need for more power, more efficiency, and a better understanding of what’s going on.
Learn how to cut back on power; that’s the first and best way to get more boondocking time out of your batteries. Cutting back on use of electrical power gets into the same skills that boondockers need for water and propane conservation. You can do simple things like taking shorter showers (the water pump is a big energy consumer) and doing less dishwashing, switching to LED bulbs if your trailer didn’t come with them, setting the furnace temperature lower, etc. Conservation takes a little effort and a little practice, but it pays off immediately.
There are other ways to conserve as well. If you have an inverter, use it minimally because it’s a fairly inefficient way to power your devices like laptops. The inverter turns 12 volt DC power into 120 volt AC power, which then gets turned back into DC power by the “power brick” attached to your laptop. In each step, some energy is wasted—and even when there’s nothing attached to the inverter it is constantly consuming a small amount of power. Switch it off when you’re not using it.
More efficient devices are needed for boondocking. A laptop can pull 60-100 watts, which is a lot when you’re running on battery. Using a tablet instead of a laptop cuts that power requirement to 10 watts or less, and it can recharge off a USB outlet, which means you can skip the inverter — or recharge in the car while you’re driving.
In hot weather, bail out of the trailer by late morning when things warm up, and try to stay out as late as possible. This cuts down the length of time you’ll need the vent fans, saving about 24 watts per fan used. That power is put to better use after sunset when the temperatures start to drop.
Sometimes it’s easiest to relocate your power consumption to another place. In other words, if you’ve got to log some laptop time, consider relocating to a coffee shop and using their power (and wifi). Consider trying the campground showers to cut use of the power-hungry water pump in the trailer. Instead of running the inverter to watch a movie in the trailer, consider going into the local town to see what’s playing.
A lot of people hate conserving because it makes them feel deprived, but if you take a different perspective you may not mind so much. You may find that the steps you take to conserve open the door to opportunities for new experiences.
By Rich Luhr