Choosing the right generator for your caravan isn’t just a matter of plug and play. It can mean the difference between seamless power and blown fuses, or between quiet nights and headaches from the roar of overkill wattage. The goal is to get it just right—and that means understanding your setup, your power habits, and what generator specs actually mean.
If you’re shopping for caravans in Heatherbrae and planning to tour Australia without constantly relying on powered sites, understanding generator sizing is essential. From appliances to inverter compatibility, let’s break it down clearly so you can avoid costly mistakes.
Understanding Generator Ratings: Watts, Not Just Words
The first step in sizing your generator is learning to speak its language. Generators are rated in watts, and you’ll commonly see two key numbers:
- Starting (or peak) watts: The highest output the generator can manage momentarily to start up devices.
- Running (or continuous) watts: The output it can maintain over time.
A 2000W generator might be perfect for charging your laptop and running lights, but fire up the air con and you could hit a wall. Understanding the peak draw of your appliances will help determine your minimum generator size.
Common Caravan Power Requirements
While each caravan setup varies, some appliances have fairly standard draw requirements:
- Laptop: 100-200W
- LED lights: 20-60W (total)
- Fridge (12V compressor): 100-200W
- Microwave: 1000-1500W
- Air conditioner: 1600-2400W (starting) / 1000-1500W (running)
- Electric kettle or toaster: 1000-2000W
When used simultaneously, these quickly add up. For example, running a fridge, lights, and charging a few devices can push you close to 800W without even thinking about cooling or cooking.
Minimum Generator Size For Light Use
If you don’t have heavy draw appliances, a compact generator may be enough. A 1000W to 2000W inverter generator can cover:
- Charging electronics
- Running lights and water pump
- Small TV or stereo
These smaller generators are lightweight, fuel-efficient, and run quietly—ideal for weekenders or minimalist setups.
What If You Want To Run Air Conditioning?
This is where size really matters. Air conditioners have one of the highest startup draws in a van. Even a compact rooftop unit can require 2000 to 2400W just to kick in. Once running, they settle into a lower wattage range, but your generator must still manage the spike.
For air con usage, a minimum 2400W generator is recommended, though some prefer 3000W for overhead.
Inverter Generators Vs Conventional Generators
Inverter generators produce cleaner, more stable electricity—perfect for sensitive electronics like laptops or smart TVs. They also tend to be more fuel-efficient and quieter.
Conventional generators can be cheaper, but they’re bulkier, noisier, and may cause damage to electronics over time.
Unless you’re powering a construction site, go with an inverter generator for caravan use. Brands like Honda, Yamaha, and Dometic are well-reviewed by Aussie travellers.
Dual Fuel Generators: Worth It?
Some newer generators offer dual fuel capabilities—meaning they can run on petrol or LPG. The benefit is flexibility and extended runtime. However, dual fuel models are often heavier and slightly more expensive.
If you already travel with LPG, it might be worth the convenience. Otherwise, petrol-only models may offer better portability.
Sound Levels And Campground Rules
Noise matters. Many caravan parks have strict rules about generator noise and operating hours. A loud generator (over 70dB) might get you kicked out or at least some dirty looks from the neighbours.
Look for generators with sound levels below 60dB. Some ultra-quiet models operate in the 52-56dB range, making them ideal for early morning coffee without waking the whole park.
Weight And Storage Considerations
Even if you want all the power in the world, you still have to carry it. A 2000W inverter generator typically weighs 20-25kg. A 3000W unit can push 35kg or more. Make sure your storage setup can handle the load safely and that you can lift it without risking injury.
If you’re towing a small van or already loaded up with gear, choosing a lighter generator might be smarter than chasing maximum power.
Frequently Asked Questions
1) Can A 2000W Generator Run A Caravan Air Conditioner?
In most situations, a 2000W generator is not powerful enough to start or run a typical caravan air conditioner. These units often require between 2200W and 2400W just to start, which exceeds the maximum output of a standard 2000W model. Even if it manages to power the unit briefly, it’s likely to strain the generator, reduce efficiency, and cause tripping or overheating. While some advanced air conditioners come with soft-start features that reduce the startup power draw, these are the exception rather than the rule. If you insist on trying it, expect inconsistent performance. To avoid frustration or potential damage to either your generator or appliances, it’s smarter to invest in at least a 2400W generator. A 3000W model offers additional peace of mind and better performance, especially during hot days when your air conditioner may work harder.
2) What Size Generator Do I Need To Run Everything In My Caravan?
To power everything in your caravan simultaneously—including air conditioning, microwave, lighting, water pump, fridge, and device charging—you’ll need a generator with at least 3000W output. This size gives you flexibility and overhead for startup surges, especially from power-hungry devices like air conditioners or microwaves. Keep in mind that simultaneous usage drives the required wattage up fast. Many travellers find alternating usage—running the microwave only when the air conditioner is off, for example. If you’re relying on off-grid power regularly, investing in a 3000W inverter generator ensures reliability and prevents overloads. It’s also worth considering battery backups or solar panels to reduce dependency on fuel-driven generators and extend your power setup.
3) Are Inverter Generators Really Better For Caravans?
Inverter generators are far superior for caravanning due to the clean power output they produce, which closely mimics household electricity. This is crucial for safely powering sensitive electronics like laptops, smartphones, or medical devices like CPAP machines. They also operate at variable speeds, reducing fuel consumption and noise. Inverter models are generally lighter and more compact, making them easier to transport and store in tight caravan compartments. Although they come at a higher price point, the benefits outweigh the cost. If you plan on using your generator frequently and value quiet operation, efficiency, and longevity for your gear, an inverter generator is the clear winner. Conventional models may be tempting due to lower upfront costs, but the potential for appliance damage and campground bans makes them less ideal.
4) Is It Better To Have One Big Generator Or Two Small Ones?
There’s an ongoing debate among seasoned travellers about whether it’s smarter to carry one large generator or two smaller units that can be run in parallel. Running dual 2000W generators gives you flexibility: you can run one during low power needs to save fuel and noise, and connect both when higher output is needed, like during air conditioner use. This modularity can also offer redundancy; if one unit fails, you’ve still got power. However, it also means more weight, more fuel, and higher upfront costs for compatible models and parallel kits. On the other hand, one 3000W generator is often simpler, especially if you’ve got the storage space and physical ability to move it. Choose based on your power profile, storage capacity, and physical setup.
5) Can I Use A Generator In All Caravan Parks?
No, generator use is not universally allowed across all caravan parks. Many managed parks, particularly those in densely populated or environmentally sensitive areas, have rules either banning generators outright or limiting their usage to specific times. This is primarily due to noise and emissions concerns. Even if allowed, you’ll likely be restricted to low-decibel models under 60dB and expected to only use them during daylight hours. National parks and free camps may be more lenient but still expect respectful use. Always check signage or speak to park management before using your generator. Using a quiet, fuel-efficient inverter generator improves your chances of staying within guidelines and keeping peace with your neighbours.
Speak With The Local Experts At 7th Street Caravans
Whether you’re planning to travel off-grid or want help understanding what powers what, the team at 7th Street Caravans can walk you through the key differences in generator setups and caravan compatibility.
Start your journey with confidence — visit 7th Street Caravans or give our team a call on 02 4012 6009 for friendly, local advice.