Welcome back to another session of Todd’s Tech Tips! In this installment, we’re diving into some key RV questions that RV enthusiasts frequently ask. As always, I’m here with Tony to help break down these questions so that you can keep your RV adventures running smoothly. Let's get started!
1. Running Your Propane Generator While Traveling on Hot Days
Our first question comes from @RVingtheCrossroadsofLife about running an Onan 5500 propane generator to power the air conditioner while driving on hot days.
Absolutely, you can do this. The propane generator is an internal combustion engine, just like the one in your truck. There's no safety issue there. Of course, check with your manufacturer for their recommendations first. The main concern lies with your refrigerator or water heater. If left on while driving, the Venturi effect could cause flames to be sucked out, potentially damaging your RV's exterior. As long as your fridge and water heater are off, you’re good to go with the generator on.
2. Winter Storage for Lithium and Lead-Acid Batteries
Chad Haney asked how to store lithium batteries in the winter while boondocking.
For lithium batteries, like those from Big Beard Battery, simply leave them on because they are self-heating. Cold temperatures can cause issues when charging lithium batteries, so self-heating ensures they don't freeze. If you're storing for the winter, you can turn them off by pressing the off button, or disconnect them, and they'll be good to go. For lead-acid batteries, it’s best to keep a trickle charge on them, especially in extreme temperatures.
3. How Many Amp Hours Do You Need to Run an RV Air Conditioner Overnight?
Gary Merill wanted to know how many batteries are needed to run an air conditioner all night without shore power.
Here’s the simple math: An RV air conditioner typically draws around 1,400 watts per hour (while running) at night. If you have a 300 amp-hour battery, that equates to 3,600 watts of power, but you don’t want to drain it completely, so plan on about 3,000 watts of usable power. With one 300 amp-hour battery, you can expect to run your AC for about 2 hours. With two 300AH batteries, you get about 4 hours, and a third battery can stretch it to 6 hours. Depending on how frequently the AC cycles, you may get close to 8 hours with three batteries.
4. Low Water Flow in One Faucet
Mechanic Mark asked about low water flow in one faucet while the rest of his RV's faucets are functioning well.
This likely points to either a clogged aerator or a kinked water line. Start by cleaning the aerator—this small piece can collect debris over time and restrict water flow. If that doesn’t fix the issue, check for any kinks in the water line, especially under the cabinetry or beneath the RV.
5. Inverter Safety with Shore Power or Generator
RVing with Bandit was concerned about whether it’s dangerous to leave the inverter on when switching to shore power or running the generator.
If your inverter is wired correctly—especially if it was installed at the factory—there shouldn’t be any issue. Most RVs come with an automatic transfer switch that safely manages power sources, including inverters, generators, and shore power. If the inverter detects 120 volts from another source, it will switch to pass-through mode. If you installed the system yourself, make sure everything is wired properly to avoid potential issues.
Final Thoughts:
These were some great questions, and we hope the answers help you on your next RV adventure! Remember, whether you’re boondocking in the desert or troubleshooting a faucet, there’s always a solution to keep your RV life running smoothly. Stay tuned for more tips, and keep those questions coming!
Happy RVing,
Todd & Tony