Pure Sine Wave Inverter | Best Guide for Everyone in 2021

pure sine wave power inverter

What will you prefer, for an exchange of $1, 80 cents or 100 cents? Of course, you’ll go for 100 cents for $1, especially when you’re aware of the actual value. It is what the pure sine wave inverter does for you. In contrast to a modified sine wave inverter, the pure sine wave power inverter gets you the exact and finest exchange of AC output for your DC input. The result is, your AC appliances don’t starve for the right AC wave and they live more happily. By now, you might be feeling more curious to know A-Z about the pure sine wave inverters. To help you decide between the worth of a pure sine wave power inverter, we’ll explain everything in our guide. Let’s get started with our thoroughly researched article.

Table of Contents

What exactly is a Pure Sine Wave Inverter?

Pure sine wave inverter is a pure AC wave output source, just like you receive from your power grid. Not enough info? We’ll uncover all of it here. Most of your domestic or commercial appliances are sensitive to the DC that your solar panel or batteries generate. Instead, they have been engineered to run on the primary power supply from the power station, which is in the form of AC. To help them work on their expected efficiency, you need AC. Unfortunately, your adopted alternate power source like solar panels or batteries does not provide AC but DC. So, you need a device named an “inverter” that could transform this direct current (DC) into an alternating current (AC). Thanks to power inverters, they are helping you here. But how much? Not all power inverters are the same. Some are TOOOOO expensive but reliable, and some save you money but not your appliances. How? We’ll explain later; stay tuned to move to the next section though here we’ll dig deeper into “what is AC?”

What is an AC or Alternative Current? Let’s Know First.

The AC is the standard current that comes in your power outlets. In AC, the electrons flow in continuous varying or reverse directions that form waves like these.

pure sine wave
pure sine wave

This current flow is a combination of two types of electrons: negative and positive electrons. When this flow changes direction into upward positive electrons and downward negative electrons, each time it reaches two peak points (up and down) to form a wave. And the power alternators or generators create a wave known as a sinusoidal AC wave. To produce AC (reverse directional current), the power generator spins a magnetic field around the static wire coils with the help of a shaft. And, AC is produced in all wire coils following Faraday’s law of electromagnetic induction. As a result, a wave-like current is created, which is powerful enough to travel farther. Keep in mind how fine the above AC wave is, as mentioned above. We’ll discuss it again.

Why do you need AC Current?

Before thinking about, “why should we spend on AC inverters,” it’s essential to know whether you really need alternative current. The answer is, “yes.” Why? The power stations already produce “farther to reach” and cheaper electricity in the form of AC. So, our appliances are already AC efficient. But, unfortunately, they aren’t much capable of DC.

Pure Sine Wave VS. Modified Sine Wave

Did we ask you to remember the AC wave? How did you find it? It was uniform and continuous, right? So, what if it’s disturbed like this?

Modified sine wave
Modified sine wave

When your AC output is even as fine as shown in the earlier section, it’s a pure sine wave. However, when the inverters, alternatively, form this wave in a modified, stepped way with flat tops, it’s the modified sine wave.

How does a Sine Wave Power Inverter Work

The pure sine wave inverter changes the DC into AC in three stages. Yet, the output voltage quality, frequency, and overall performance of the device primarily depend on the circuitry’s design. Here is how it works.

The Oscillator Stage

At the oscillator stage, the inverter changes the DC into AC as oscillating (wave) pulses on the varying frequencies with the help of continuous switches’ “on/off” system in the circuit. These pulses are positive and negative peaks of battery voltage to form waves specific in number per second for particular voltage output. For example, you get 120 pulses of 60Hz for usual American domestic usage. However, these pulses are so weak that no devices can use them purposefully. So, here comes the next stage to help with the utility. We know it as the amplifier stage.

The Booster (Amplifier) Stage

You can know by the name that this stage gives a boost to the electric current. It improves the AC, yet, it’s not complete here. The reason is, the AC is still of no use being weak though it has got some enhancement.

Transformer Stage

Now, in the transformer inside the inverter, the current from the amplifier enters the transformer’s secondary winding. These windings of the transformer increase the AC voltage enough to help you run your appliances. Finally, you get the AC output you can use to run your electronics.

How is Pure Sine Wave Inverter Different from others?

Stop thinking that the difference is, “the pure sine wave power inverter is more expensive than the modified sine wave inverter. ”The cost factor is, undoubtedly, because of the design only. The primary difference is as we elaborate here.

Pure Sine Wave Inverter

Then, what makes the pure sine wave inverter special? The answer is “pure” sine wave. A pure sine wave is a constant wave of current with a continuous periodic rise and fall. You can observe it through the Oscilloscope in the diagram.

pure sine wave diagram
pure sine wave diagram

This uniformity ensures that AC is smooth. You can also observe this output from your grid supply with the help of an Oscilloscope. Hence, your devices run without compromising the quality of AC. Some generators also produce pure sine wave current.

Pure Sine Wave Power Inverter Vs. Analogue Pure Sine Wave

You can call a sine wave coming from an analog pure sine wave as an analog pure sine wave. The only difference is that the “analog” switching results in some noise on the AC wave. However, analog pure sine wave inverters are not advisable for medical equipment. Here are some benefits of the Analogue pure sine wave inverters.

  • They provide noise-free and positively effective AC for general and ordinary appliances like chargers, microwaves, and other power tools.
  • The analog pure sine wave chargers are helpful for electric shavers, garage door openers, laser printers, and emergency flashlights.

Pure Sine Wave Power Inverter Vs. Modified Sine Wave Inverter

You already know much about the pure sine wave power inverter. So, here we’ll let you know how the modified sine wave inverter is different from the former. The modified sine wave inverter is not the cheapest. Yet, as you know, the wave that this inverter form is in the shape of square steps in descending and ascending order. So, the AC output is not noise-free and purest. However, you can use these types of inverters for some of your appliances, though it’ll reduce the performance and life span of your devices/appliances. Here is how modified sine wave inverters can affect the equipment’s performance, despite being cheaper.

  • Motors operating equipment like refrigerators, pumps, and fans can run on the modified sine wave inverters. Yet, they’ll use 20% extra power to charge you extra. The reason is, unlike American domestic power demand of 120V, the power output from a modified sine wave inverter is higher in frequency. Resultantly, being of no use, it ends in waste.
  • Many electronic devices like timers or digital clocks receive their power from the peak of the positive and negative curves. However, the modified sine wave power charger has a flat line, not the peak point. It’ll cause a double trigger. Consequently, their performance will be compromised because of this noisier and abrupt sine wave. Hence, the digital clock will either run faster or stop working.
  • Your speed drill will only work on the “on/of” option. Thus, you’ll not be able to use them at various speeds.
  • Some fluorescent lights might be noisy, and dim on the modified sine wave power inverter.

Still, the modified power inverters are most common for their low cost — lower performance and lowered life of devices.

Pure Sine Wave Power Inverter Vs. Square Sine Wave Inverter

We have got little to say about square wave sine inverters. Why? In every way, they are the cheapest inverters with the poorest performance. As the name tells you, they only form a square wave.

Square wave
Square wave
  • The only purpose of square sine wave inverters is to aid the motors with AC.
  • These inverters are not reliable for your appliances.
  • Square wave inverters are the loudest. So, they aren’t environmentally friendly.
  • Square wave inverters are the cheapest. Despite that, they don’t make a pleasant choice.

Hence, you cannot compare a square wave inverter with a pure sine wave power charger — they’re poles apart.

What are the Benefits of a Pure Sine Wave Inverter?

Pure sine wave inverters have been rocking the floor for recent years, though they’re costly. Indeed, the value that you get is making them lucrative. Here are some benefits of a pure sine wave inverter.

● Upgrade Performance and Longevity of Electronic Devices

Since many devices primarily use AC, they only need AC as their power source. So, running your appliances on an AC inverter ensures longevity and guaranteed performance.

● An Excellent AC Source for Zero Voltage Sensitive Devices

In a pure sine wave inverter, the voltage rises and falls in the form of waves. There are specific points when the voltage is zero. In a modified sine wave inverter, at this point, the voltage remains at zero for a longer time, and then instantly it changes. For some devices that are sensitive to zero voltage, the modified inverters can be harmful. Hence, the safest option is to use pure sine wave inverters without caring about their price because a compromise will cost you soon, more than you would have expected.

● Only Reliable AC Source for Pure Sine Wave Needing Devices

Some Devices are sensitive to non-pure sine wave currents like microwaves, motors, bread makers, battery chargers, and light dimmers. So, you need only the pure sine wave charger only. Or, you can take a risk to permanently or consistently damage your electronics.

● Noise Free Performance for AV Equipment

The audio equipment, video devices, and satellite system perform better at pure sine wave inverters. It helps them remain “buzz-free.” In this way, you keep the irritating noise away.

● Pure Sine Wave Chargers are Safe

The pure sine wave AC output is clean and distortion-free. When your devices and appliances only demand pure sine wave current, using a modified sine wave inverter can cause $$$$ harm. Thus, despite appearing expensive, the pure sine wave inverters save you much. The “easy to heat up” appliances like microwaves and motors stay cooler on pure sine wave inverters. Thus, they get a safer AC partner to provide them with the best electricity. The pure sine wave prevents crashes in computers, odd-looking printouts, and glitches in PC monitor glitches. Hence, they are also a demand for your “computers.”

● The AC Source for Purest Pure Sine Wave Demanding Devices

Some devices come with special instructions to run them on the STATIC range from the pure sine wave inverters to ensure the cleanest pure sine wave (superior to that you get from a power station.) By getting the advised inverter, you ensure the actual performance of your equipment with safety. Not only this, but your STATIC range of pure sine wave inverters also gives longer life to your batteries. You might need such an inverter for your computer and air conditioners. Commercial appliances feel safe with the premium quality inverters: STATIC inverters. Thus, the result is the purest AC for your heavy-duty and demanding equipment at office spaces, commercial areas, like elevators and air conditioners, along with minimized noise pollution.

● Cost-Effective for the Value

You can calculate the total cost of a pure sine wave inverter vs. your monthly electricity bills. You’ll see a big difference because you’ll be saving more money than before. Thus, for the value, the pure sine wave chargers are exceptional.

Are there any Disadvantages of Pure Sine Wave Inverters?

No, there aren’t any serious disadvantages of pure sine wave inverters. Yet, some factors play a key role in why people would like to prioritize a modified sine wave inverter over the pure sine wave power inverter.

● Price

The delicacy and sophistication in the pure sine wave inverters cause more cost for the system, which is higher than modified inverters. Therefore, many folks think twice before investing in a pure sine wave power inverter.

● Portability

Pure sine wave inverters are heavier than modified sine wave inverters because of their magnetic core. Therefore, the portability is not breezy.

● Power Usage

Unlike the modified sine wave inverters, our sine wave inverters are extremely systematic to bring you pure AC. It’s why they also use more energy to carry out such an arduous task with the help of their composite system. Resultantly, they consume more power from your batteries. In short, some factors are drawbacks of these excellent inverters. Yet they don’t hugely disappoint you if compared with their worth.

Why are Pure Sine Inverters so Costly?

Would you think that these are the benefits of pure sine wave inverters that make them so expensive? If “yes,” you’re mistaken. The advantages are the by-product only. It’s the complexity of the device’s design to do a demanding task of forming pure sine waves that are making it costly. The perfect DC to AC inverters are hard to make. However, for their “sine wave purity,” we classify them as competitive. The highest quality sine wave results from many filtrations and regulations. For the cycle’s fractions and regulation, these inverters need energy storage. Thus, they are more complex. So, it costs much to build such a challenging device. As the modified sine wave is easy to make through PWM (pulse width modulation), like a 4017 IC (digital counter plus decoder circuit), it is simple. In contrast, in a pure sine wave power inverter, the PMW comes through the microcontroller look-up table to form accurate and dense waves. Likewise, the “on/off” transition between the transistors is also faster. Hence, the delicacy and perplexity of the device make it offensively costly. The resulting pure sine wave delivers the advantages:

  • It’s power-saving.
  • The sine wave brings incredible performance to the equipment.
  • It results in noise-free operations.
  • The sine wave gets you a clean power supply.
  • The suitability of AC for electronic equipment is fantastic.

In short, the advanced engineering, expenditures, and resulting benefits make the pure sine wave power inverter the most valuable.

How to Choose the Best Sine Wave Inverter

Choosing the right, pure sine wave inverter can be a tiresome task. However, this quick guide can help you a lot to make an ideal choice.

● Inverter Size

Inverter size has a direct relationship with its performance and cost. But did you think of it as the dimension? No way..!!! By the Pure sine wave inverter’s size, we mean its output. It’ll be a better idea to choose an inverter with more output than you need. It’s so because the inverters are 10-30 percent less potent than their mentioned value. But how much should you add to your actual requirement? The answer is, make the calculations for your actual size of a watt. Now, add 20% more to it. Your inverter should be closer to the value that you get. Still, the inverter’s size is complicated to understand. Primarily, the inverters come with two ratings: continuous and peak. The peak is the power amount that your device will need to start working. On the other hand, “continuous” is the amount of power that your electronics will need to keep running. As you’ll be already adding 20%, we advise you to calculate the power demand, keeping the “continuous energy” amount in view.

● Power Output

Once done with the total power need, pay attention to the battery power. So, while deciding on a pure sine wave power inverter, make sure that the batteries have the needed power capacity. To put it simply, for more power you’ll need more battery power. We advise you to get an iron lithium phosphate battery that will pair with your inverter more effectively.

● Inverter Efficiency

Pure sine wave inverters come in varying forms and capacities to deliver different efficiencies. Therefore, the inverter’s efficiency is crucial to consider before buying yours. The reason is, like any electric device or DC-AC converter, the pure sine wave chargers also produce heat and consume more power from the batteries. For instance, if you closely notice your 2000A battery, the output is less up to 10% of its actual mentioned figure. Likewise, many inverters cause more gaps and affect your power output significantly. So, make sure you’ve fully learned all the specs of your pure sine wave inverter. As a bonus tip, you can save battery power by keeping your inverter on, if no other electronic device is running on it. It’ll keep your inverter from using battery power.

● Operating Time

Operating time is your inverter’s running time to supply your electronic devices with the power from the battery. Luckily, your pure sine wave power inverter can stop the supply at a critical level of the battery. You can also calculate your inverter’s running time by dividing the battery’s capacity “Ah” by the required current output.

● Price

Undoubtedly, the price of a pure sine wave inverter is under consideration when you want to buy yours. According to the brand and capacity, the inverters’ prices vary from $$$ to $$$$. However, not necessarily you’ll need a costly pure sine wave inverter when you want it or for domestic use only. In comparison, the inverters for commercial usage will be highly expensive. Remember, by low-cost inverter you should never mean an underperforming inverter. It can be of no use, ultimately. So, compare the options available to make a budget choice without falling short of value. To help you get an inverter under budget, we’ve listed some price ranges here. ● For up to $100, you can get an AC inverter with up to 1,000-watt capacity. Thus, for your car, you can find dozens of options under this range. ● For $100-$500, you can get a high-quality pure sine wave inverter with 1,000-2,000 watt output. Such an inverter can effortlessly support your RV or boat electronics. ● For up to $500 or above, you can have some heavy-duty inverter with 3,000 to 12,000 watts output. These inverters are helpful for homes and small offices.

● Safety Features

Pure sine wave inverters are easy to use and are also safe. But your electric equipment can be hazardous. Therefore, carefully read all the safety features that your inverters come with. It’ll prevent you from economical and physical loss. So, look for:

  1. Cooling capacity
  2. Under-voltage protection
  3. Over-voltage protection

Often, the manufacturers have categorically mentioned the safety standards. In comparison, the generalized safety standards let you know the overall safety of the device. For instance, some inverters serve the RVs and campers best because they can handle the vibrational conditions of traveling pretty well. Such inverters are comparatively costly — they save you from equipment’s loss of $$$$$.

● Warranty

The warranty of any product hugely affects your overall experience with it. For example, you must have seen some best-selling devices with the highest user satisfaction. If you study the users’ feedback closely, you’ll find that manufacturer’s support, customer service, and warranty have been major factors to earn such a winning user satisfaction for any product. So, when you want to be happy with your purchase, favor an inverter with a considerable warranty period. No matter if it’s more pricey, you’ll never feel looted.

● Additional Features

Additional features enhance the utility of the device by making it more comfortable for the user. You can consider these features before getting a pure sine wave power inverter:

  • Range of Outlets lets you conveniently use your inverter by charging different devices at the same time. You should choose an inverter with a minimum of 2 AC outlets and USB outlets.
  • A remote control system can be of great help when you love a smart lifestyle. Many pure sine wave power inverters come with a remote control system. The remote control system inverter can be exceptionally helpful when you’ve placed your inverter into the camper’s rear area, and it’s hard to approach.

In a nutshell, by taking care of your needs and devices’ specs, you can make a fortunate choice.

Final Thoughts

A pure sine wave inverter is the surest way to get fabulous quality AC output to run most of the appliances with incredible performance. Though these power inverters seem costly, yet for the value, they are unparalleled. By getting a suitable pure sine wave power inverter, you can get the best out of your devices and also help them last longer, besides saving heavy costs of electricity that power generators could charge you. What info do you need next about the pure sine wave inverters? Let us know by commenting below.

FAQs about Pure Sine Wave Inverters

Any guide can be more helpful, especially when some more queries keep you worried. To help you know as much as possible, in our definitive guide to pure sine wave inverter, we’ve also included some frequently asked questions that many users ask. We hope you’ll also find them helpful.  

How much is a pure sine wave inverter?

A pure sine wave inverter can cost you from $100 to $1000 or more, depending on its frequency and output.

How big of an inverter do I need?

You don’t need a “big” pure sine wave inverter. You need an inverter according to your AC power needs. As a rule of thumb, you can add the all devices’ power requirements for “running” and compare it with the “continuous outputs” as mentioned on the inverter.
If the value matches the nearest highest value by adding 20% extra, you can consider that value. For example, if your devices need 1000 watt power, pick an inverter with 1200 watt output.

Can I leave my pure sine wave inverter on?

You can, but you shouldn’t. Keeping your pure sine wave inverter “on” is not a hazard. However, it will consume your battery power. By turning it “shut off” you can save power and give it a rest for cooling down. It’ll help your inverter last longer.

Is a 1000 Watt pure sine wave inverter enough?

A 1000 watts inverter is great to run your RV or tiny home appliances including, a coffee maker, toaster ovens, laptops, and cameras.

How efficient are pure sine wave inverters?

The efficiency of pure sine wave inverters depends on their frequency. The higher the frequency is, the better efficiency is. Most of the premium quality sine wave charges deliver 90-95% efficiency, while others perform with 75-80%.

Do you really need a pure sine wave inverter?

It entirely depends on your energy needs. As stated earlier, when your appliances have already been designed as AC efficient, then you’ll need the sine wave inverter for your delicate equipment. You might direly need it when you’re away from the grid power source and often rely on your generator or solar power system.

Who makes the best pure sine wave inverter?

Here are some well-known brands to make pure sine wave power inverters for you:
● Voltwork
● ZHCSolar
● Giandel
● Bestek
● GoWise
● Bapdas
● Foval

Is an inverter better than a generator?

An inverter is far more cost-effective than a generator because you’ll need a gallon of gas every hour to keep the generator working. The inverters are also more competent. Besides this, inverters are not as noisy as generators are.

Do generators produce pure sine waves?

Yes, digital inverter generators produce pure sine wave AC, just as you get from your power outlets.

Can I run a TV on a modified sine wave inverter?

It is better for the health of your TV to run it on a pure sine wave inverter.

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