Disadvantages of pure sine wave inverters

In general, pure sine wave inverters are preferred over modified sine wave inverters when it comes to powering sensitive devices such as microwave ovens, game consoles, laser printers, compressors and more on the go.

This is because the output voltage you get from these handy kits is a perfect replica of the power supplied by the mains (it has incredibly low harmonic distortion).

But like artificial machines, a pure sine wave inverter can harm you in a number of ways.

This article takes a look at the main disadvantages of the pure sine wave inverter, also known as true sine wave inverters, to help you make the right decision.

Let’s look at the basics first.

How does a pure sine wave inverter work?

To generate a current that is as stable as utility power, a pure sine wave (PSW) inverter feeds the battery voltage through three phases:

  1. Oscillation: The inverter starts making oscillating pulses using a transistorized circuit (an IC circuit). A built-in oscillator coordinates all steps in the oscillation process.
  2. Amplification – To operate smoothly, the inverter’s AC power output must be as powerful as the utility grid. To this end, the pulses produced by the oscillator are amplified to achieve a high current level.

This time the critical phase is controlled by the supplied amplifier.

  • Output Transformation: The voltage received from the amplification stage is still at the DC battery power level and cannot effectively power the various electronic components. Now it goes through a transformer to convert it into an alternating current that can power your planned electrical appliances.

Naturally, the installed output transformer supervises the DC-AC change procedure.

As you may already know, the signal from your PSW converter can be used to power all electronic devices during your camping/boating trips.

This wider range of applications also makes PSW inverters more economical as an emergency power source in homes and businesses than MSW inverters.

Now let’s turn our attention to the issues surrounding PSW investors.

Disadvantages of pure sine wave inverters

The most common drawbacks of pure sine wave inverters are:

 The higher cost of pure sine wave (PSW) inverters

Let’s start with the most complained of: cost.

Pure sine wave inverters are now more expensive than watt-modified sine wave inverters because the technology they use to generate their cleaner power is more advanced.

It is not surprising that you always pay considerably more for a PSW inverter than for an MSW inverter with the same watt.

Therefore, it is always good to evaluate whether you really need a pure sine wave inverter before placing an order.

You see, cheaper modified sine wave inverters work perfectly for home appliances that don’t use rectifiers and devices that can be efficiently powered by a regular DC adapter and it wouldn’t make sense to spend tons of money on an expensive PSW inverter if you’re into plan to rise to power, team said.

In other words, the only time you need to buy a pure sine wave inverter is when you need portable/backup power for devices that primarily run more efficiently with a PSW inverter.

Here is a list of some of the tools and devices that work well with PSW inverters to guide you:

  • All electronics with AC motors (or inductive loads), for example refrigerators.
  • All power tools use solid state or variable speed control circuitry.
  • Medical devices, especially devices that use a heated humidifier, for example, a CPAP machine and oxygen concentrators.
  • Some computers (including certain laptop models) and related equipment, such as laser copiers, printers, and some hard drives.
  • Certain fluorescent lamps (most use electronic ballast for current control).
  • Microprocessor controlled heating systems including some new ovens.
  • Speed ​​/ microprocessor controlled sewing machines.
  • Smart ovens and microwaves.
  • Digital watches (models with radios).
  • Smart battery chargers for your battery tools.
  • Capacitive input powered devices without transformers such as flashlights, smoke detectors, etc.
  • Most dimmers
  • Other electrical appliances with microelectronics installed, such as toasters, razors, hair straighteners, electric toothbrushes, etc.

If you’re not going to power these machines, you’re probably fine with a well-powered PSW inverter.

However, as a precaution, read the documentation that came with the device (or contact the manufacturer) to determine if pure sine wave energy is required.

  Shorter battery running time

PSW inverters generally use DC power more inefficiently than MSW inverters and your battery may not last as long as using a custom sine wave inverter.

One of the reasons behind this behavior is the complex technologies built into the pure sine wave inverter circuits, as they consume some of the battery voltage.

The other reason is the use of heavy and inefficient transformers in PSW converters.

Therefore, an MSW inverter may be a better option if you plan to power normal light bulbs and other non-intensive power consumers, as long as they are compatible with custom sine wave inverters.

Disadvantages of pure sine wave inverter: frequently asked questions (FAQs)

Q: Do computers need pure sine wave?

Well, while some PCs survive the inefficiency of MSW inverters, a pure sine wave takes the guesswork out of thinking about using it with an inverter.

In reality, computers run best on pure sine waves, even computers designed to work with MSW inverters, so it may be the best option if you have the finances.

That said, the best course of action is of course to check your computer’s power specifications to make sure it can work with a true/modified signal wave before making a purchase.

Q: What is the best pure sine wave inverter?

The short answer is that it depends on your needs.

In general, when choosing an inverter, you should consider things like the power you need (depending on what you will be connecting), the variety of features you may need (think USB ports for charging, protection against overload, a good screen for current DC voltage tracking and more).

Your budget will also have a major impact.

Wrapping it up

You don’t have to worry about the above-mentioned drawbacks of the pure sine wave inverter as many devices work safely with custom sine wave inverters (with the exception of the sensitive equipment listed).

You should still be aware of the potential drawbacks of MSW inverters, such as interference, before making a decision.

In short, it’s important to focus on the opposite sides of both sine waves when shopping for an ideal inverter for your RV, boat, home or campground.

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