What Size Generator Do I Need for Caravan?

Buying guide ·
What Size Generator Do I Need for Caravan?

Find the right generator for your caravan with the help of the "What Size Generator for Caravan?" guide. The appropriate generator size is critical for a smooth mobile experience, combining energy requirements with practicalities. Anyone who has gone boondocking in a remote region understands that power is only sometimes available. Even campgrounds may have restricted access, rendering shore power cumbersome and unreliable. For these reasons, generators have become indispensable for many caravans and campers.


On this page, you'll learn how to choose the best generator size for your caravan. Dive into the minutiae of power usage, efficiency, and the nuances determining the ideal balance. Make sure your caravan is powered efficiently and reliably on every road trip by arming yourself with the knowledge to make an informed selection. Furthermore, Jackery Solar Generators are an excellent way to charge caravan appliances using renewable and clean energy. 

Table of Contents

Key Takeaways:

• A caravan generator is a portable power source tailored to provide electricity for caravan appliances and devices when conventional grid power is inaccessible.

• When it comes to caravan generators, more significant is only sometimes better. There are four steps to determine what size generator is for a caravan, including calculating the power consumption, choosing the right type of generator, selecting the proper size, and counting the optimal solar generator capacity.

• A caravan solar generator harnesses sunlight to generate electricity using photovoltaic (PV) panels mounted on the caravan's roof or exterior, as for the Jackery Solar Generator, which is a portable solar system combining Jackery Solar Panels with a Portable Power Station.

• We highly recommend Jackery Solar Generator 2000 Pro and 2000 Plus for charging your caravan with higher capacities.

• When choosing a generator for a caravan, you need to consider its power output, fuel type, portability, noise level, size, brand reputation, and budget.   

What Is A Caravan Generator?

A caravan generator is a portable power source that provides electricity for caravan appliances and devices when average grid power is unavailable. These generators, which run on gasoline, propane, or diesel fuel, generate alternating current (AC) power and come in various sizes and configurations to meet different energy needs and consumption scenarios.

Their lightweight and small form makes them easy to move, allowing caravan owners to use them in various settings, including camping sites, isolated locales, and outdoor events. Despite their mobility, caravan generators have powerful capacities, capable of powering a variety of caravan necessities such as lights, freezers, air conditioners, televisions, and electronic devices, offering comfort and convenience on the road.

The advantages of a mobile generator go beyond its portability and versatility. Beyond powering appliances, they provide a sense of independence and flexibility, allowing caravan owners to operate autonomously without relying on grid power. This freedom benefits off-grid activities and extended stays in isolated areas where conventional electricity may be scarce.

Caravan generators provide emergency backup power, ensuring comfort and convenience during power shortages or unanticipated events. With their dependable performance and numerous applications, caravan generators are indispensable companions for caravan enthusiasts seeking self-sufficiency and peace of mind.

What Size Generator Do I Need for Caravan?

When it comes to campervan generators, more doesn't always mean better. It would be best to have enough power to run your appliances and recharge your batteries. But having a solid generator that could power your devices without harming them would be helpful. Watts, volts, and amps are the three parameters to consider when determining the proper generator size. 

  • Watt is a unit of power. The number of watts required will determine the size of the generator.
  • Volts Volts show the flow of electrical current through a wire. It shows you how much voltage a caravan can tolerate. Most caravan plugs are 120 volts.
  • Amps indicate its current capacity. Caravans in different classes will have other amp plugs, commonly 30 or 50 amps.  

The following are the detailed steps to determine what size generator for the caravan:

how to determine what size generator for caravan

Step 1: Calculate The Power Consumption of Caravan Appliances 

Your amp requirement is an essential baseline because it determines the size of your desired generator. You should purchase a more significant generator if you have high-powered equipment (such as a microwave or hair dryer). In contrast, someone primarily using low-power items like smartphones and an electric blanket may get by with a smaller system like the Jackery Solar Generator. Check the amps (A) or watts (W) needs of each appliance and device to determine how much power they use.

It would help to consider your caravan's amp rating when deciding what size generator to acquire. Then, use the following formula to determine how much capacity you require in watts.  

Amps (A) x volts (V) = watts (W)

Usage patterns will differ based on the type of camping you are doing. For example, your energy consumption will likely be higher if you remain in a caravan park with a hookup rather than boondocking in remote areas without facilities. The same applies to whether your generator has enough electricity to run an air conditioner or a space heater. Knowing how much power popular appliances need allows you to assess the size of the caravan generator needed for your rig. Here are some everyday caravan gadgets and their power consumption:


Power Consumption (Watts)

Current Consumption (Amps)




LED Lights









Air Conditioner



Air conditioners take more electricity to operate than any other mobile equipment, often 10 to 20 amps at 120 volts. While most caravans can work without air conditioning while temperatures outside aren't too high (usually less than 80°F), it's always a good idea to have a cooling system in your rig if things become hot. 

Step 2: Choose The Right Type of Caravan Generator  

Caravan generators exist in two types: portable and built-in/stationary. Portable generators give additional backup power, whereas built-in generators frequently come pre-installed. These possibilities are divided into fuel kinds, the most frequent being solar-powered and gas or diesel generators. Here are some of the contrasts between solar and fossil-fueled generators:

Solar-powered generators create electricity from solar panels and store it in a portable power station, which functions similarly to a large bank of batteries. Solar generators, such as the Jackery Solar Generators, may power a few additional ordinary caravan appliances simultaneously. Solar energy is gaining popularity as a power alternative for campers and caravan owners looking to lessen their reliance on fossil fuels and carbon footprint while camping or off-grid

Gas and diesel generators are inexpensive, simple to operate, and can run continuously with enough fuel. However, they are also noisy and messy and require frequent refuelling and maintenance. Examining the poisonous fumes and greenhouse gas emissions produced by fossil fuel generators and the long-term expenses of regular refuelling makes sense.

Generator Type




- Widely available fuel

- Portable

- Produces emissions

- Requires fuel storage

- Pollute environment


- Fuel-efficient

- Long-lasting

- Noisy

- Heavy and bulky

- Pollutant

Solar (e.g., Jackery)

- Quiet operation

- Renewable energy source

- Clean

- Easy to use

- Portability

- Initial cost may be higher

- Limited power output at night or in cloudy conditions

The Jackery Solar Generators are ideal power sources for caravan trips, allowing you to stay in remote areas without traditional power sources. The integrated solar panel provides sustainable and environmentally friendly power. This grid-independent feature expands your caravan options and encourages you to explore the natural beauty outside your designated campground.

Step 3: Size The Generator for Caravan

Aside from the ampere, you'll need to estimate the operating duration to get the total amps used. Perform the following calculation:

Amps x run time (hours) = Amp-hours

For example, suppose your laptop has a power draw of 0.45A, and you use it for two hours daily. You'll need a generator with at least 0.9Ah capacity to power your laptop. However, you should give enough room for surge power and extra space to avoid exhausting the generator's battery. A generator with a portable power station capable of producing at least 200Wh is a safe estimate here. With its 300Wh capacity, the Jackery Explorer 300 Plus portable power station would be ideal.

Remember that this is simply the wattage for a single device. Add the amp-hours from all your equipment and devices to calculate your caravan's electricity usage. The following are some popular sizes of caravan generators.

common caravan generator sizes
  • Class B Caravan with an AC Unit: 2,000-2,800W
  • Class C Caravan with an AC Unit: 2,800-3,600W
  • Class A Caravan with 2*AC Units (15,000 BTU): 5,000-8,000W
  • Class A Caravan with 3*AC Units (15,000 BTU): 10,000-12,000W
  • Fifth Wheel with 2*AC Units: 5,000-7,000W

Please remember that these ranges may fluctuate depending on your unique equipment. The specific equipment determines the size of the generator required in your caravan.

Step 4: Calculate Optimal Solar Generator Capacity 

Add up the power ratings of all appliances that will be powered simultaneously. Then, evaluate the daily sunshine hours and intensity at the caravan site to determine solar energy generation potential. Finally, choose a solar generator with a battery capacity that can store enough energy to meet power requirements during periods of low sunshine or overnight. Calculate the required battery capacity using the expected energy usage and desired autonomy.

How Does A Caravan Generator Work?

A caravan solar generator converts sunlight into power through photovoltaic (PV) panels fitted on the caravan's roof or exterior. These solar panels are made of semiconductor materials that, when exposed to sunlight, generate direct current (DC) electricity. The DC produced by the solar PVs is then routed into a charge controller, which regulates the voltage and current entering the battery bank.

The battery bank stores extra electricity generated by the solar panels for later use when sunshine is unavailable, such as at night or overcast days. The stored electricity in the batteries charges the caravan's appliances and devices via an inverter, which transforms the batteries' direct current (DC) electricity to alternating current (AC) electricity compatible with ordinary household appliances and electronics.

The system runs autonomously, gathering sunlight throughout the day to replace the battery bank and provide a consistent power source for the caravan's energy requirements. Monitoring and control devices can be connected to the system to track energy production, battery status, and system performance in real time, allowing users to regulate power consumption more efficiently and optimise the performance of the caravan solar generator.

How Does Jackery Solar Generator Work? 

A Jackery Solar Generator combines a lithium battery pack with integrated solar charging capabilities to provide portable and renewable electricity for various applications. The generator's lithium battery stores electricity from Jackery Solar Panels or other charging sources, such as AC power outlets or automobile adapters. The integrated solar charging feature allows users to recharge the battery with solar panels attached to the generator via the built-in solar input connection.

When exposed to sunlight, the Jackery Solar Panels convert it into DC electricity, which is then put into the Jackery Portable Power Station's battery and stored. The lithium battery's stored energy can subsequently be utilised to charge various devices and appliances via the generator's AC outlets, DC ports, and USB ports.

how jackery solar generator works

Jackery Solar Generators are lightweight, compact, and portable, perfect for camping, outdoor excursions, emergency backup power, and off-grid living. Monitoring and control capabilities, such as integrated display panels or mobile apps, enable users to track battery state, input/output power, and charging status in real-time, resulting in effective energy management and improved performance of the Jackery Solar Generator.

Jackery Solar Generators for Caravans

A Jackery Solar Generator is a portable solar power device that converts sunlight to electricity and stores it in batteries for later use. Unlike standard gas-fired generators, solar generators run quietly, create no pollutants, and require no maintenance. The Jackery Solar Generator combines Jackery Solar Panels and a Portable Power Station that converts sunlight into power. This makes it ideal for charging caravan appliances such as portable coolers, camping lighting, GPS, radios, and more.

Jackery Solar Generator 2000 Pro

The Jackery Solar Generator 2000 Pro has an exceptional charging capacity of 2,160Wh. It can be charged in under 5.5 hours using 6* SolarSaga 100W solar panels or in only 2 hours using an AC power outlet. Tailored for camping experiences, particularly in locations like New South Wales where electrical outlets are sparse, it becomes an indispensable companion for charging equipment ranging from mini-fridges to phones and illumination.

The Jackery Explorer 2000 Pro portable power station is a dependable emergency backup power supply with a ten-year lifespan and twice-weekly use. Its durability is enhanced by features like heat dissipation and high-temperature protection, ensuring peak performance in various environments. The SolarSaga 100W solar panel's IP67 Waterproof Rating protects it from harsh and moist situations, making it durable and trustworthy.

With a single switch, you may experience the simplicity of endless power. The upgraded input and output display displays give crystal-clear data, including low battery and fault code indicators, providing a smooth and informed operation. The Jackery Solar Generator 2000 Pro combines cutting-edge technology with rugged dependability, providing abundant clean energy to power your travel.

jackery solar generator 2000 pro
Jackery Solar Generator 2000 Plus

Jackery's high-performance Solar Generator 2000 Plus substantially advances portable power options. Its massive capacity and high power output allow it to power standard vans for weeks, making it ideal for outdoor trips or home backup power supply. Incorporating battery cells into the Jackery Solar Generator 2000 Plus increases capacity from 2 kWh to 12 kWh, resulting in a paradigm shift in household backup power supply.

The Explorer 2000 Plus can deliver up to 3000W and has a 30% higher rated power than comparable 2 kWh models. Powered devices make up the vast majority of essential household appliances. Despite its regular use, the Solar Generator 2000 Plus can be fully charged in 6 hours (using 6* SolarSaga 100W solar panels). The power source becomes self-sufficient, charging from solar energy instead of the power grid.

The add-on battery pack can be charged with solar panels, providing additional flexibility while boosting charging efficiency and saving time. Jackery Solar Panels produce more lifetime energy due to their excellent solar conversion efficiency of up to 25%. Our solar panels produce 50% more electricity in low-light circumstances than traditional solar panels (PERC) and have a more robust spectrum response.

jackery solar generator 2000 plus

What Size of Solar Generator Do I Need?

To select the correct size solar generator for your needs, consider your energy demand, the efficiency of your solar panels, battery storage capacity, and the specific needs of your equipment. Choosing the right size solar generator involves balancing energy needs, setup efficiency, mobility, and cost. Customers can select a Jackery Solar Generator with capacities ranging from 12 kWh to 300Wh for a portable solar system based on their energy requirements. The formula for estimating the operational hours of Jackery Solar Generator-powered appliances is as follows:

Working Hours (H) = [Jackery Solar Generator Capacity (Wh)*0.85] / Appliance's Wattage (W)

The Jackery Solar Generator 2000 Pro can power a 100W ceiling fan for 18.36 hours (2160Wh x 0.85/100). This calculation helps determine the hours when appliances can operate.

jackery solar generator 2000 pro vs 2000 plus

How to Choose The Best Caravan Generator?

Various elements must be examined when choosing the best caravan generator to guarantee it fulfils your requirements and tastes. Here are some crucial variables to consider:

  1. Power Output: Before you choose a generator with enough power output, you need to find out how much power your caravan's appliances and gadgets need. Consider continuous and peak power ratings to ensure the generator can easily manage the load.
  1. Fuel Type: Consider the generator's fuel type, which might be gasoline, diesel, propane, or solar. Select a fuel type that is readily available and suitable for your requirements. Gasoline and propane generators are popular due to their portability, although diesel generators are more fuel-efficient and durable.
  1. Portability: Determine the generator's portability, especially if you intend to travel regularly or utilise it in distant areas. Look for lightweight, compact designs with handles or wheels for simple transportation.
  1. Noise Level: Consider the generator's noise level, especially if you value peaceful operation or want to use it in noise-sensitive environments like campers or residential areas. Look for generators that use silent operation or sound-dampening technologies.
  1. Size and Weight: Ensure the generator's size and weight are appropriate for your caravan's storage space and weight capacity. Choose a generator that balances power output and compactness for maximum convenience.
  1. Runtime and Fuel Efficiency: Check the generator's runtime and efficiency to see how long it can run on a single fuel tank. Look for generators with fuel-efficient engines and large fuel tanks to maximise runtime between refuellings.
  1. Brand Reputation and Warranty: Look into the generator brand's reputation and whether it offers warranties or customer support. Select a respected company for producing high-quality products and providing dependable customer support.
  1. Budget:Set a budget for the generator, including upfront expenditures, fuel charges, and upkeep. Compare several options based on their features, performance, and overall value proposition to get the best generator for your budget.

What Size Generator for Caravan FAQs

The following are the most frequently asked questions about what size generator for a caravan in Australia:

1. What size solar generator do I need to run my caravan aircon?

The generator size required to run a caravan air conditioner is determined by the air conditioner unit's power consumption. Most trailer air conditioners have power ratings of 1,000 watts to 2,000 watts or higher. As a result, a generator with a power output capacity equivalent to or greater than the air conditioner's rated power is required. For example, if your trailer air conditioner has a power rating of 1,500 watts, a generator with a capacity of at least 1,500 watts (1.5kVA) is appropriate.

2. Will a 2kVA generator run a caravan?

A 2kVA generator can power various essential caravan equipment and devices, such as lighting, electronics, small cooking appliances, and low-power air conditioners. However, it is critical to analyse the power requirements of all caravan appliances and equipment to ensure the generator's capacity is enough. If the entire power demand is within the generator's capacity, it may be able to supply all of the appliances concurrently with overloading.

3. Will a 2000w inverter run a caravan air conditioner?

A 2000W inverter may be able to power a trailer air conditioner, depending on the unit's power requirements. Examine the air conditioner's beginning (surge) and running (continuous) power to ensure compatibility with the inverter. Some air conditioners may demand more surge power than the continuous power rating, exceeding the capabilities of a 2000-watt inverter. Review the manufacturer's specifications for the air conditioner and the inverter to determine compatibility.

Final Thoughts

With insights into power consumption, efficiency, and practical issues, you can now make an informed decision specific to your caravan trips. Finding the ideal balance between power requirements and practicality is essential, regardless of whether you use a small portable generator or a more permanent solution. Jackery is ready to illuminate your route with excellent mobile energy solutions, guaranteeing that your caravan excursions are powered efficiently and reliably throughout.

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