A hot Texas afternoon can turn a simple campsite decision into an electrical one. You want the air conditioner running, the refrigerator cold, and enough power left for coffee in the morning. This guide to RV electrical loads helps you understand what your rig is asking from the pedestal, so you can camp comfortably without tripping a breaker or stressing your equipment.
The good news is that most RV electrical issues are preventable. They usually come down to knowing your service type, recognizing which appliances pull the most power, and avoiding the temptation to run everything at once. A little awareness goes a long way, whether you are staying for a weekend near Bandera or settling in for a Hill Country season.
Start With Your RV’s Electrical Service
Before counting appliances, confirm whether your RV has 30-amp or 50-amp service. The plugs look different, and the available power is very different too.
A 30-amp RV service provides one 120-volt leg of power. In simple terms, it can supply about 3,600 watts total at one time. That is enough for many travel trailers, smaller motorhomes, and modest electrical needs, but it requires some planning when temperatures climb.
A 50-amp RV service has two 120-volt legs. It can provide up to roughly 12,000 watts total, depending on how the RV is wired and how loads are distributed between those legs. A 50-amp coach does not have just 20 more amps than a 30-amp coach. It has far more usable capacity, which is why it is common in larger fifth wheels, big rigs, and RVs with two or more air conditioners.
Your RV’s shore-power cord, electrical panel, and owner manual are the best places to verify your service. Never assume a larger pedestal connection means your RV can safely accept more power. Your RV is protected by its own main breaker, and its plug type is designed for its system.
Guide to RV Electrical Loads: Know the Heavy Hitters
Watts measure how much power an appliance uses. Amps measure the electrical current flowing through the circuit. At a typical 120 volts, you can estimate amps by dividing watts by volts. A 1,200-watt coffee maker, for example, uses about 10 amps while heating.
You do not need to calculate every lamp and phone charger. Focus on the appliances that create heat, cool air, or move a motor. These are the items most likely to push your RV near its limit:
- Roof air conditioners, often 12 to 16 amps each while running, with a higher draw when starting
- Microwave ovens, commonly 10 to 15 amps depending on the model
- Electric water heaters, often around 10 to 13 amps
- Portable space heaters, usually 12.5 amps on their high setting
- Hair dryers, electric skillets, toaster ovens, and coffee makers, often 8 to 15 amps each
- Residential-style refrigerators and washer-dryer combinations, which can add meaningful load during their operating cycles
The exact numbers vary by appliance, age, and setting. Check the data label or owner’s manual when you need certainty. A portable plug-in power monitor can also show real-time draw for individual appliances, although it will not replace proper knowledge of your whole RV panel.
A refrigerator on electric mode usually draws less than an air conditioner or space heater, but it still matters when several appliances cycle on together. Battery chargers and converters deserve attention too. After a night of running lights, fans, and electronics, the converter may work harder to recharge the battery bank once you connect to shore power.
What a 30-Amp Camper Can Run
With 30-amp service, think in combinations rather than individual appliances. One air conditioner may use about half your available capacity. Add the refrigerator, converter, and a few smaller loads, and there may not be room for a microwave or water heater at the same moment.
A practical 30-amp routine is to run one major heating appliance at a time. If the air conditioner is on, switch the water heater to propane when available, then pause the AC briefly before using the microwave or hair dryer. It may feel like a small adjustment, but it keeps the day moving without repeated trips outside to reset a breaker.
Portable electric heaters are especially easy to underestimate. A typical heater on high can use nearly half the capacity of a 30-amp service by itself. It may be fine on a cool evening, but running it alongside an air conditioner, electric water heater, or kitchen appliance is a common cause of overloads.
What Changes With 50-Amp Service
A 50-amp RV gives you more breathing room, not permission to ignore the electrical system. You may be able to run two air conditioners, a microwave, and other everyday appliances, but the loads must still be balanced across the RV’s two legs.
In most RVs, the electrical panel handles that distribution. Yet one side of the panel can still become overloaded before the other does, especially after an owner adds appliances or changes circuits. If one breaker trips while the overall coach seems to have plenty of power, the issue may be a crowded branch circuit rather than the campground pedestal.
For extended stays, 50-amp service is a welcome advantage when summer heat, home-office equipment, cooking, and laundry all become part of daily life. Still, it is wise to stagger heavy-use appliances. Give the air conditioners a moment to settle before starting a high-draw cooking appliance, particularly during the hottest part of the day.
Protect Your RV Before You Plug In
A campground pedestal is your connection to the grid, but your RV deserves protection between the pedestal and its electrical panel. A quality RV surge protector or electrical management system can help identify problems such as low voltage, high voltage, open ground, reverse polarity, or a damaged neutral connection.
Low voltage is a concern during periods of heavy demand. Air conditioners can draw more current when voltage drops, creating extra heat and wear in their motors. If an electrical management system reports unsafe voltage, do not try to power through it. Turn off sensitive equipment and let campground staff know what you are seeing.
Inspect your shore-power cord before each stay. Look for cracked insulation, loose blades, discoloration, or melted plastic around the plug. Plug the cord firmly into the pedestal, then secure the connection so it is not hanging under its own weight. Keep the cord as dry and protected as possible, and do not run it where vehicles can drive over it.
Avoid lightweight household extension cords for RV power. They are not designed for the continuous load of an RV and can overheat. If you need a short extension for an approved purpose, use a heavy-duty RV-rated cord with the proper amp rating and as little extra length as practical.
Handle Breakers the Right Way
A breaker that trips is doing its job. It is telling you that a circuit is carrying more current than it should, or that another fault may be present. Do not repeatedly reset it and hope the problem disappears.
First, turn off or unplug the appliances that were running. Reset the breaker once, then add loads back gradually. If it trips again with only modest loads, leave it off and investigate further. A worn appliance, damaged cord, failing air conditioner, loose connection, or problem within the RV may need professional service.
GFCI outlets are another layer of protection, especially around kitchens, bathrooms, and outdoor locations. If a GFCI trips, moisture or a faulty appliance could be involved. Start by unplugging portable items, reset the outlet, and test equipment one piece at a time. Never bypass a GFCI or defeat a grounding pin just to keep an appliance running.
Make Comfortable Camping Easier
The simplest habit is to make a quick power plan when you arrive. In warm weather, decide whether the air conditioner is the priority and set the water heater or refrigerator to propane if your RV supports it. When cooking, avoid piling the microwave, coffee maker, and electric skillet onto the same busy morning.
For seasonal guests, small choices add up. LED lighting, a shaded windshield, closed blinds during peak sun, and reasonable thermostat settings reduce strain without taking away comfort. Keeping air-conditioner filters clean helps too. A dirty filter restricts airflow and makes the unit work harder for the same result.
At Pomarosa RV Park and Homestead, every site includes both 30-amp and 50-amp electrical service, along with water and sewer hookups. That gives travelers with a wide range of rigs a dependable place to settle in, but your own RV’s service rating still sets the rules for what can run at once.
A peaceful stay is easier when your electrical system is not asking you to troubleshoot all evening. Learn your service, respect the major loads, and let one high-draw appliance finish before starting the next. Then you can spend less time at the pedestal and more time enjoying the open space, a quiet sunset, and the freedom that brought you down the road in the first place.