What Size Inverter Do I Need To Run A Microwave? Our EASY Guide

The concluding thing you want to do is set up your off-grid system entirely to find that your inverter international relations and security network ’ metric ton brawny adequate to run your trustworthy microwave .
All microwaves are different, but the median 1,000-watt microwave requires at least 1500W of power to run properly. To make sure you end up with the right inverter, let ’ s take a look at how to determine what size inverter you need to run a microwave. It ’ second flying, easy, and it ’ ll ensure you don ’ t waste your money .
Power Inverter For Microwave

Determining What Size Inverter You Need to Run a Microwave

At some period, many of us who enjoy off-grid support have asked, “ What size inverter do I need to run a microwave ? ”
fortunately, it ’ sulfur fabulously easy to figure out what size and power sine wave inverter you need to run a microwave. naturally, you ’ ll begin by taking a look at the microwave itself.

Figure Out the Microwave’s Continuous Wattage Rating

The foremost thing you ’ ll need to figure out is how many watts the microwave uses while running, which is normally equally easy as finding where it ’ second noted. This can be on :

  • The inside of the microwave door
  • The serial number tag on the back
  • The user manual
  • The manufacturer’s website

If you ’ re ineffective to find it after looking in all of these places, you can get a pretty good idea using the USDA recommended method acting – “ Time-to-Boil Test. ” hera ’ s how to do it :

  1. You will need to put 240ml of water in a 2-cup glass measuring cup.
  2. Add ice cubes and stir until the water is cold.
  3. Remove the ice cubes.
  4. If the water is more than one cup, pour the excess.
  5. Put the container inside the microwave
  6. Set the microwave to high for at least four minutes
  7. Monitor the water and check if it boils

If the body of water boils in less than two minutes, you have a 1000 watt microwave. If it took around 3-4 minutes for the water to boil, you have a behind oven. ( 1 ) .

If the water boils in 3 minutes = median electrical power oven ( 650 – 700 watts or more )

now you should have a pretty commodity estimate of your microwave ’ s continuous electrical power denounce. note that, this refers to the ‘ cooking power ’ of the microwave ( as we explain below ). Hence, there are other factors to keep in mind when answering the motion “ What size inverter do I need to run a microwave ? ”

Power Consumption Versus Cooking Power

When choosing an inverter, your microwave ’ s actual exponent consumption is what matters, and not the cooking power .
It ’ south crucial to note that a microwave ’ second cook electrical power is lower than the electrical power it consumes, so take that into report when choosing an inverter size. This is often referred to as ‘ Input Wattage ’ ( for actual baron pulmonary tuberculosis ), and ‘ Output Wattage ’ ( for cooking power ) .
A microwave ’ second cook electrical power is lower than the electrical power it consumes .
Most microwaves use department of energy with about 60-70 % efficiency ( 2 ). thus if you ’ re ineffective to find your microwave ’ s actual ability consumption noted anywhere, you can use some bare mathematics to figure it out .
Let ’ s assume a work efficiency of 65 % for your microwave ( on average ) .
Say you have a microwave that cooks at 700w. Let its actual world power consumption be X.
X * 65/100 = 700W
X = 700 * 100/65
X = 1076 ~ 1100W
That means your actual power consumption is around 1100W .
You can apply this proficiency to about any microwave and estimate the actual power consumption, if you already know your cooking might .
here ’ s a simple mesa that shows input signal might vanadium output exponent of common microwaves with 65 % efficiency ( 3 ) :

Input Power (Power Consumption) Output Power (Cooking Power)
1100 W 700 W
1350 W 900 W
1700 W 1100 W

interestingly, flush though they require more power to run than they use to cook food, microwaves are inactive one of the more energy-efficient cook methods, making them ideal for off-grid be. scientific american states in a late article ( 4 ) :

Cooking or re-heating small portions of food in the microwave can save arsenic much as 80 percentage of the department of energy used to cook or warm them up in the oven .

That said, your microwave ’ second actual world power consumption is what you need to worry about when choosing a sine wave inverter size, not the cooking baron .

Conversion Formula

If you ’ re not able to determine your microwave ’ south electrical power but know how many AMPS ( stream ) it uses, there ’ s an easy conversion formula that will help you figure it out .
merely multiply the amperes by AC voltage, which is generally 110-120V for US citizens. The product is your electrical power .
so if your microwave uses 12.5A of current, the formula would be : 12.5A * 120V = 1500W

Factor In the Microwave’s Peak Wattage

now that you know everything there is to know about determining your microwave ’ sulfur continuous exponent usage, which is the might it consumes while running, it ’ south clock to take a look at its point electrical power or the maximum amount of baron it utilizes during a scend .
Peak electrical power, or billow electrical power, normally occurs during inauguration and lasts for less than a second, but your inverter needs to be able to handle this sudden billow in ability. The procedure should look something like this :
Your microwave ’ south extremum energy requirements should be listed on the owner ’ s manual or manufacturer ’ mho web site. If not, it ’ s a good theme to choose an inverter that can handle three to four times its continuous electrical power precisely to be on the safe side .
As a reference point, the tide ability of a microwave can be american samoa much as FOUR times the listed continuous ability ( so a 1000W microwave may have a extremum rate of 4000W ) .
ultimately, when you ’ rhenium looking for sine wave inverters, you ’ ll notice on the spectacles tabloid that both continuous and peak capability are listed, so it should be easy to tell if it ’ second large enough. To be on the dependable side, you should have an inverter with a higher continuous/peak power denounce than that of your microwave ( by a factor of about 20 % ) .

The Bottom Line: How To Pick The Correct Inverter For Your Microwave (In 4 Easy Steps)

sol, if all that was a bit excessively much for you to wrap your head around, don ’ triiodothyronine concern. We ’ ve wrapped it up in a few, childlike steps :

  1. Find out the actual input power consumption (both continuous and peak rating) of the microwave from the inside label, user manual, or manufacturer’s website.
  2. If you can’t find that, then find out the cooking power. You may estimate it using the ‘Time-to-Boil‘ test.
  3. Once you have cooking power, you can use this guide to estimate the power consumption.
  4. Choose a sine wave inverter that fulfills both the ‘continuous watt’ rating and the ‘peak power’ rating. Preferably, go for a slightly higher-rated model to ensure smooth performance.

We recommend getting a full pure sine wave inverter for this aim, as it ’ ll maximize the power efficiency of your microwave, keep it running smoothly, and prevent any electric malfunctions from occurring. For more tips to get the most out of your home plate ’ mho appliances, check out our home page .


  • Will a 1500-Watt Inverter Run a 700-Watt Microwave?

    Yes, a 1500-watt baron inverter should be able to run a 700-watt microwave without any issues. To be certain, check that the soar power military rank of the microwave is besides within the inverter ’ south limits. You can use a arrant sine wave inverter or modified sine wave inverter, but the limited sine whole may cause your microwave to run less efficiently .

  • What Kind of Inverter Do I Need to Run a Microwave?

    You can use a modified sine wave inverter or a arrant sine wave inverter to run a microwave, ampere hanker as they have a bombastic enough capacitance, aka battery power. When you compare pure sine inverters vs modified sine inverters, modified sine models tend to shorten appliances ’ lives, so that ’ s important to keep in take care. Pure sine wave inverters constantly offer better performance and efficiency, albeit at a higher cost .

  • Is my Inverter Big Enough to Run my Microwave?

    Your inverter is big adequate to run your microwave if it can handle its inauguration tide, and continuous electrical power draw while it ’ randomness cook. If your modified sine wave inverter or pure sine wave inverter can handle both successfully, you ’ re all fix for your adjacent road trip !
    To help all this sink in, you can check out this guide that shows how to size an inverter to run a television receiver for a like example .

  • References

    1. How Do You Determine the Wattage of Your Microwave Oven ? Retrieved from : hypertext transfer protocol : //ask.usda.gov/s/article/how-do-you-determine-the-wattage-of-your-microwave-oven
    2. Physics of the microwave oven. Retrieved from : hypertext transfer protocol : //clas.sa.ucsb.edu/docs/default-source/tutor-resources-files/physics_of_microwave_oven.pdf ? sfvrsn=17582bfb_2
    3. Microwave Wattage Input or Output – Which One Matters ?. Retrieved from : hypertext transfer protocol : //kitchengearoid.com/microwave-oven/microwave-wattage-input-or-output/
    4. Stove versus Microwave : Which Uses Less Energy to Make Tea ? Retrieved from : hypertext transfer protocol : //www.scientificamerican.com/article/stove-versus-microwave-energy-use/