If you don’t want to worry about this, look at your large loads and oversize the inverter so that you have capacity. Most inverters will range between 1,000 watts and 5,000 watts, and you’ll probably need an inverter size somewhere in the middle. Many wonder what size inverter they need for their RV and estimate something far larger than necessary.
Take 1,500 + 300 (which is 20% of 1,500) = 1,800 watts. This means you’ll need a pretty average size inverter of at least 2,000 watts. A 2000- or 3000-watt unit is the most common size used in RVs. Does the Inverter Need to Power the Whole RV? Thankfully, no. If this were the case, we would all have to purchase very powerful inverters.
The 12V battery of the RV can only enable electrical appliances with low power to work normally, such as 12V refrigerator and LED light, ventilation fan or small TV. If you want to use a high-powered electric appliance such as a rice cooker, a microwave oven, an electric kettle, or an induction cooker, you need a power inverter.
RV inverters allows conversion from 12V battery power to 120V AC power. For your power needs, you need the right size inverter for your RV.
You can easily estimate the size inverter you’ll need by adding up the largest number of watts you’ll be using at a given time and adding 20%. For example, let’s say you need 1,500 watts to run your computer and microwave at the same time. Take 1,500 + 300 (which is 20% of 1,500) = 1,800 watts.
In campervans and motorhomes, an inverter is essential for converting the 12 volts (V) DC power from your battery into 240V AC power for running household appliances.
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