How Big Of Generator Do I Need For My Rv

Okay, so you're thinking about getting a generator for your RV? Awesome! That's like giving your mobile home a superpower. But before you go out and buy the biggest, loudest, most fuel-guzzling beast on the market, let's figure out: How big of a generator do you actually need?
Think of it this way: buying a generator is a bit like ordering pizza. You don't want to end up with a pie so small you’re still hungry (underpowered generator), or so gigantic you’re eating leftovers for a week (overpowered generator). We're aiming for that Goldilocks zone – just right.
First Things First: Watts Up?
The key to unlocking the generator puzzle is understanding wattage. Watts measure the amount of electrical power your appliances use. You'll typically find this info listed on the appliance itself, often on a sticker near the power cord or on the back of the device. Don’t worry, it’s usually pretty straightforward!
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Why is wattage important? Because your generator needs to be able to supply at least the total wattage of all the things you want to run simultaneously. Imagine trying to power a whole stadium with a battery designed for a flashlight – not gonna happen, right?
Pro Tip: Most appliances list two wattages: running watts and starting watts. Running watts are what the appliance needs to operate consistently. Starting watts (also called surge watts) are a temporary higher wattage needed to initially kick the appliance on, especially things with motors like air conditioners, refrigerators, and microwaves. This is super important! You need to account for this peak demand.

The Appliance Rundown: Let's Make a List
Grab a notepad (or your phone – we're modern folks, after all) and make a list of everything you realistically plan to run at the same time. Think about it – are you really going to run the microwave, the air conditioner, the coffee maker, and the TV all at once? Probably not every single time.
Here are some common RV appliances and their typical wattage ranges:
- Air Conditioner: 1500-2000 starting watts, 1000-1500 running watts
- Microwave: 1000-1500 watts
- Refrigerator: 600 starting watts, 150-200 running watts
- Coffee Maker: 600-1200 watts
- TV: 50-150 watts
- Lights (LED): 5-15 watts each
- Laptop Charger: 50-100 watts
Remember, these are just averages! Check your specific appliances for their exact wattage.

Adding It All Up: The Wattage Calculation
Okay, now the (slightly) math-y part. But don't worry, it's not rocket science!
- Identify the appliance with the highest starting wattage. This is likely your air conditioner.
- Note that starting wattage.
- Add the running wattage of all other appliances you plan to run simultaneously to that starting wattage.
Example: Let's say your air conditioner has 2000 starting watts and 1300 running watts. You also want to run the refrigerator (200 running watts) and the TV (100 running watts).

Your calculation would be: 2000 (A/C starting) + 200 (Fridge running) + 100 (TV running) = 2300 watts
This means you'll need a generator that can supply at least 2300 watts to handle the initial surge and then maintain consistent power.
Buffer Zone: Playing It Safe
It's always a good idea to add a bit of a buffer. Think of it as insurance! A generator running at its maximum capacity constantly is going to be stressed and won’t last as long. Plus, you might decide to add something else down the road.

A good rule of thumb is to add 10-20% to your total calculated wattage. In our example, that would be 2300 + (2300 x 0.10) = 2530 watts. So, aiming for a generator that can handle 2500-3000 watts would be a smart move.
Inverter vs. Conventional: A Quick Note
You'll likely encounter two main types of generators: inverter and conventional. Inverter generators are generally quieter, more fuel-efficient, and produce cleaner power, making them ideal for sensitive electronics like laptops and TVs. Conventional generators are often more powerful and more affordable, but they're also louder and can be less fuel-efficient.
The Bottom Line
Choosing the right generator size is about finding that sweet spot between power and practicality. It's about understanding your needs and making informed decisions. So, take the time to assess your RV's power requirements, do the math, and choose a generator that fits your lifestyle. You’ll be relaxing in comfort in no time!
