Best Power Inverter

A power inverter is basically a device that converts DC (direct current) power into conventional AC (alternating current) power. It allows you to operate your household electrical equipment using the power produced by a vehicle or by various renewable energy sources such as wind turbines or solar panels. However, with so many types of inverters available on the market, it can be a bit difficult to find exactly what you need. Therefore, after a lot of research into the advantages and disadvantages of various models found in the current market, we picked our final 5. Take a look at the matrix below and choose the one that meets your expectations.

Top 5 Power Inverter Comparison

1. Whistler XP3000i 2. Power Bright APS600-12 3. KRIËGER KR1500 4. ERAYAK 1000W 5. BESTEK 300W
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Manufacturer Whistler PowerBright KRIEGER ERAYAK BESTEK
Model XP3000i APS600-12 KR1500 8099U MRI3011BU
Dimensions 3.54 x 8.9 x 15.5 inches 3.54 x 8.9 x 15.5 inches 13.1 x 5.6 x 2.7 13.6 x 10 x 5.8 inches 6.7 x 2.4 x 6 inches
Weight 12.5 pounds 8 pounds 4.52 pounds 4.9 pounds 1.1 pounds
What’s in the box? 3000 Watt Power Inverter, User Guide 600W Pure Sine Power Inverter, User Guide 1500W Power Inverter, 1 set of 3 FT 2 gauge 100% copper cables, In-line fuse, User Manual 1000W Power Inverter, 6 internal 20 amps Fuse, User Guide 300W Power Inverter, User Manual

Product Specifications

Maximum Continuous Power 3000W 600W/650W 1500W 1000W 300W/360W
Maximum Surge Capability (Peak Power) 6000W 1000W 3000W 2000W 700W
USB Port 5V 2.1A N/A 2 x 5V/max. 2.1A (iPad) 5V 3.1A DC 5V, 4.2A
Input 12V DC 10-15V DC 24VDC, 80A 12V DC 12V DC
Output AC110 115VAC 105-125V, 13A ACV110 110V~120V
Max Outer Temperature 50℃-80℃ < 65 C 65°C Max 60℃-70℃ N/A
Input Over voltage Protection 15.5+/-0.5 volts DC 15V 31 +/- 0.3 VDC DC 15V-16V DC 15V-16V
Input Low voltage Protection 10.0+/-0.5 volts DC 10V 21 +/-0.3 VDC DC 9.2-9.8V DC 10V-11V
No Load Current Draw < 1.3 < 0.85A < 0.5A DC < 0.5A DC < 0.5A DC
AC Receptacle 3 North American 3 Prong 2 AC Receptacles 2 Standard North American 3AC outlets 3 Grounded AC outlets 2AC outlets


Thermostat Controlled Fan Built-in Thermo Cooling Fan Wired remote control LED light Indicator
Overload Indicator Overload Indicator Tablet Charging Built-in cooling fan Durable metal housing
Electronic Circuit Protection LCD display 24-inch cigarette lighter plug


Warranty 2-year 1-year parts and labor 3-year parts and labor 1-year, 30 days return 18-months
Customer Support
Online Manual

Things to Consider When Picking an Inverter

As mentioned above, there are so many models of inverters in the marketplace, that finding the right one could be a backbreaking task. You may find many different sizes and multiple brands of power inverters. Therefore, in order to find exactly what you need, we have gathered a few factors that you need to consider before making a purchase.

  • Choosing the right inverter size

  • The size of your inverter strongly depends on the watts/amps of what you want to operate. It is advisable to opt for a larger inverter than what you need. On the other hand, it is very important to know that a big inverter cannot be used for all your household appliances. While a TV is rated at 250 watts, a microwave is rated at 1000 watts and a laptop at 95 watts. Take a look at their continuous power and add 20 percent. This way, you will notice that the needed power will be over 1600 watts. What you need to understand is that your chosen inverter should be at least 10% to 20% more than your largest load.

  • Power efficiency

  • The power efficiency is an important factor to consider when purchasing a high power inverter. If you are still wondering why this is so important for an inverter, remember that an inverter has the main purpose to convert DC power into AC power. The higher its efficiency is, the less power it loses in the conversion. Furthermore, the lost energy becomes heat that warms up the inverter. Therefore, before making a purchase, take a look at its power efficiency.

  • Power wattage

  • As you probably know, the power wattage is directly related to the continuous power wattage that an electronic device requires to operate. Additionally, there is the surge or peak power wattage which occurs when a device is turned on. However, household appliances that are equipped with a powerful motor need a very high surge power to start up.

  • Online real reviews

  • With the explosion of the internet, it is almost impossible not to find some useful reviews about your favorite models. It is recommended to read customers reviews about the product you plan to buy. You may find some useful reviews which can help you a lot in your decision.

What is Behind our Ratings

After reviewing and testing several types of power inverters, we can truly confirm that it is quite complicated to find exactly what you need if you have no idea about these devices. However, as outlined above, there are a few things you need to consider when looking for an inverter.

  • Peak power

  • You should probably know that an inverter needs average or typical power and surge or peak power to operate. Peak power is the power that an inverter is able to supply for short time. There are a few household appliances, especially the heavy current ones that need peak power to start up. In what regards the typical power, this is the power that an inverter provides on a regular basis. Keep in mind that it is much lower than the peak power and it is used in estimating the capacity of the battery. With this in mind, the inverters should be sized for their typical continuous power and peak load.

  • Input voltage

  • A power inverter needs a stable DC power source to operate. The input voltage definitely depends on various factors, including size, capacity and purpose of the device. To better understand we have gathered a few examples:

  • Smaller inverters that run from a rechargeable battery require 12V DC
  • The most common standards for home energy systems are 24, 36 and 48V DC
  • They require 200 to 400V DC, when they use power from solar panels
  • They require 300 to 450V DC, when they use power from electric car battery

If you are interested in buying a power inverter, make sure you opt for one that matches the voltage of your battery. In simple terms, if you are using a 12V DC battery, make sure you opt for a 12V DC inverter.

  • Output voltage

  • The alternating current (AC) voltage of an inverter is regulated at 120/240VAC. It has to be the same as the grid line voltage, even if there are changes in the load that it is driving. This way, it is able to power various electronic devices made for standard line power. Also, it is very important to know that the AC output frequency of an inverter has the same standards as power line frequency, 50 or 60 hertz. It is important to remember that electrical devices in the United States use 120V AC power, while in the rest of the world use 220-250V AC power.

  • Batteries

  • As well as using the right size electronic devices and household appliances, it is also very important to use the right battery size. Batteries are able to sustain different draw currents without producing any damages. The maximum current draw for AGM (absorbent glass mat) batteries is 30% while for gel batteries is 25% and for flooded batteries is 10%. The runtime of a power inverter is strongly related to the battery power of the device. In order to prolong its runtime, additional batteries should be added.

Our Verdict

There are so many models of power inverters available on the market, that finding the best product is almost impossible unless you know what to look for. It should come as no surprise that we selected the KRIËGER KR1500 as the best product in the marketplace. It provides 1500 watts of continuous rate and 3000 watts of peak power. As compared to the ERAYAK 1000W, it features an LCD screen which displays the input and the output voltage. Plus, it provides more information about the battery level. The KRIËGER KR1500 is a lightweight inverter which comes with a pretty nice design. It measures 13.1 x 5.6 x 2.7 and weighs no more than 5 pounds. Although it comes with a lot of features, it doesn’t have a digital volt/watt meter like the Whistler XP3000i. The digital volt/watt meter is an interesting, useful feature which helps you monitor the power usage. What put it heads and shoulders above the rest is its price tag that is more than reasonable.

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