The 13 Best Pure Sine Wave Inverters in 2021: Reviews & Buyer’s Guide
Renogy 3000W 12V Pure Sine Wave Inverter Charger w/ LCD Display
2nd Best Choice
Renogy 3000W 12V Pure Sine Wave Inverter
3rd Best Choice
Giandel 4000W Heavy Duty Pure Sine Wave Power Inverter
There are many appliances that work only when plugged into AC voltage. That’s okay when you're connected to the grid, but what happens when a power outage strikes or when you go off-grid and you only have DC power?
It’s scary to be stuck in that kind of situation without any source of electricity. If you have a lithium battery, then a pure sine wave inverter that will connect to it and convert DC to AC is a lifesaver.
I’ve been there before, so I wanted to help you avoid that situation by reviewing this year’s best sine wave inverters on our site. With this buying guide, I’ll help you choose the right system for you.
Our Top 13 Pure Sine Wave Inverters
1. BEST OVERALL: Renogy 3000W 12V Pure Sine Wave Inverter Charger w/ LCD Display
The Renogy 3000W 12V Pure Sine Wave Inverter Charger is the first on my list because it's a 3-in-1 system — it's an inverter, transfer relay, and converter/charger.
It not only transforms DC power into clean AC power but also charges and maintains your battery bank when you switch to utility power.
I found that especially useful for me since I regularly connect my boat to the utility grid.
The best part — my power has always remained uninterrupted and I never had to worry that my appliances will suddenly die on me in an emergency.
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2. Renogy 3000W 12V Pure Sine Wave Inverter
The Renogy 3000W is another great option because it’s a capable pure sine wave inverter unit with a surge power of 6000W. This is more than enough to run any appliance in your home.
And yet it is surprisingly compact out of the box. I once put it in my car and forgot about it until all the lights in my home went out during a thunderstorm, and you can bet I was beyond grateful that I had it then.
Instead of one, this inverter comes with 2 cooling fans, allowing you to use it at temperatures of up to 158°F (70°C).
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3. Giandel 4000W Heavy Duty Pure Sine Wave Power Inverter
These pure sine wave inverters are good all-rounders. I’ve tried one outdoors and indoors, and it was able to deliver what it promised.
Its 4,000 watts of output power are distributed through four AC outlets, more than enough for any off-grid scenario. That would have been great if it didn’t break down on me after only 3 months.
4. EDECOA Pure Sine Wave Power Inverter 3500W
For what it costs, this 3500W power inverter from EDECOA is packed with features while an easy-to-read LCD display tells you what’s going on at any time.
Four AC outlets are more than I normally need, but I don’t like the thumbscrew battery terminals. I’d prefer to see regular bolt and screw fastenings.
The manual that came with it is confusing, the customer support doesn’t exist, but nevertheless, the system is still working after 2 years.
5. Giandel 24 Volt 2000W Pure Sine Wave Power Inverter
This is a 24V unit, so it won’t work with standard 12V batteries. However, the Giandel 2000W is among the most compact pure sine wave inverters on our list so you can easily take one camping and use it with portable solar panels.
If you need to charge a laptop or a portable fridge, you can do it, but its two AC outlets may not be enough for camper van use.
6. VertaMax Pure SINE Wave 1500 Watt
With the inverter unit, 3-foot battery cables, and remote control, this pure sine wave kit includes almost everything you need for your off-grid or grid-tie installation.
I was pleasantly surprised to find the display showing real-time AC consumption in this price range.
Apart from getting hotter after longer use, I had no issues with my VertaMax. Unfortunately, I recommended this one to a friend, and it arrived broken at her doorstep.
It was covered by the warranty but she was told to cover the shipping, which cost a fortune. Not cool.
7. SL Euthtion 3000W Pure Sine Wave Power Inverter
This 3000W pure sine wave kit has attractive and sleek housing. When you open the package, you’ll be surprised to find 12 spare fuses and even a spare USB cable.
Unfortunately, there are only two AC outlets controlled by a single switch.
It also doesn’t make sense to me why I have to switch off the unit before I can use the wireless remote.
8. Voltworks 1500W Pure Sine Wave Power Inverter
The three AC outlets on these 1500W inverters plus 2xUSB ports should be enough to power your small electronics, car vacuum, or mini-fridge in the case of an emergency.
Still, this unit is too weak to run most power tools or appliances with heating elements. Microwaves, air-conditioners, electric skillets, and even laser printers draw startup wattage that is up to 7 times higher than their working power, and will likely overload the Voltworks 1500W.
9. GoWISE Power 1000W Pure Sine Wave Inverter
Buy this unit only if you plan to run a toaster, laptop, or phone charger in your tent — and not at the same time.
Good thing is it weighs only 6 pounds, so you won’t even know it’s among your camping gear stashed away in your vehicle. However, these inverters get a big minus in performance and versatility.
10. Novopal Power Inverter Pure Sine Wave-1500 Watt
If you’re on a budget, you might have more luck than me and get a unit that actually works. To cut the long story short, I was persistent and asked for my money back.
Online shoppers gave mixed reviews of the Novopal 1500W. I blame the poor quality control at the factory.
One way or another, four 120V output ports should work fine, as long as you keep an eye on the wattage.
11. AIMS Power 2000 Watt Pure Sine DC to AC Power Inverter
For the price of the best product on this list, you’d expect to be able to plug in multiple devices. However, AIMS Power 2000W gives you only two GFCI outlets.
If you live in a hot climate, choose another manufacturer, as these power inverters regularly shut down when the operating temperature reaches 104°F (40°C).
12. Kinverch 2000W Pure Sine Wave Inverter
Advertised as a capable unit with four AC ports and 2000W output power, Kinverch disappoints even in the sub-$100 range.
The fans seem to be struggling with heat all the time and sometimes get louder than a portable generator.
It will run a DVD player and older laptops but forget about any type of cooking appliance or power tool.
13. WZRELB 3000 watt Pure Sine Wave Inverter
Spend your hard-earned dollars somewhere else and get yourself a reliable and working DC/AC unit that actually works.
The 3000W rating is obviously fake and probably chosen just because other cool inverters have it.
I tried to run a coffee pot, but it wasn’t the smell of the coffee that alerted me, but the one of burning plastic.
What To Consider Before Buying a Pure Sine Wave Inverter
The first thing to consider is the power rating. Check the manuals or spec stickers on the back of your appliances to see how much AC energy you exactly need.
An inverter of up to 1000W is enough for laptops and phone chargers, gaming consoles, and smaller electronics, while at 3000W you can even plug in the air conditioner or electric chainsaw.
The more the wattage, the more power can the unit convert.
This one is simple — you need an inverter that’s compatible with all devices you plan to use. Devices sold in the US and neighboring countries need a standard output voltage of 110V or 120V.
Number of Outlets
If you want a powerful pure sine inverter, make sure to choose one that comes with plenty of output ports so you can run or charge multiple appliances at the same time. Apart from having 3 AC outlets, some inverters on the market even have several USB ports.
A top-shelf inverter will come with safety features that protect your unit from overheating, over-voltage, short-circuiting, and more.
An LCD display is not a must-have, but it’s nice to be able to read the current energy usage at all times.
A solid warranty is a clear message that you’re buying a reliable and quality product from a reputable company that will replace or repair your unit if any issue pops up.
Pricing of Pure Sine Wave Inverters
What Is a Pure Sine Wave Inverter and Who Is It For?
A pure sine wave inverter is a device that converts direct current (DC) such as what’s produced by a solar system or RV batteries, to usable alternating current (AC) that most appliances use.
These “pure sine waves” make up for smooth and steady voltage, just like in the power grid.
It practically means you can run your appliances wherever you are. Just plug them in, as you would back home.
In many cases, this makes a pure sine wave inverter ideal for people who live off-grid or travel around in their RV.
How Does a Pure Sine Wave Inverter Work?
A pure sine wave inverter converts DC to AC in three steps:
Step 1: Creates Oscillating Pulses
Using integrated electronics, the inverter generates oscillating direct current pulses that simulate positive and negative polarity peaks. These pulses are too weak, so they need to be amplified.
Step 2: Amplifies the Signal
This stage amplifies the 12 or 24V pulses to high-current levels needed to power appliances. Although already in AC form, the output voltage is still low to run any appliance. This is where a transformer comes into action.
Step 3: Raises the Output Voltage
In the last stage of DC/AC conversion, a magnetic transformer is used to kick up the voltage to 110 or 120V, which your appliances use.
In their raw form, these AC voltage sine waves are not true sine waves, but rather jagged and boxy.
So pure wave sine inverters use additional capacitors and filters to make the alternating current “smoother.”
Why Do You Need a Pure Sine Wave Inverter?
You need a pure sine wave inverter if you plan to install solar panels on your roof or RV. Most appliances in your home use AC power, so you need it to convert the DC power that solar panels produce to AC power. It also brings up the voltage to the grid level.
A simple way to visualize the difference is that, when graphed, a DC current looks like a flat line, whereas the flow of AC on a graph makes a sinusoid or wave-like pattern.
Karl K. Berggren, Professor of Electrical Engineering at MIT
A pure sine wave inverter also saves you money, as it’s much more efficient than the older, jagged wave inverters. The smoothly-changing phase also minimizes the risk of damage to your sensitive electronics.
What Size of Inverter Do You Need?
You need an inverter powerful enough to run the appliances you want to plug, but also match the energy rating of your solar system.
For example, if you’re going for a 3,000-watt solar system, you should purchase a 3,000-watt inverter.
This wattage, in return, depends on the number and type of appliances you want to run. You can find the power information for most devices on the spec sticker on the backside of the product.
A good rule of thumb is to always choose an inverter with 20% to 50% more than the total power that you need, and with at least twice the power of the largest device you plan to run.
What Can You Run With a Pure Sine Wave Inverter?
With a pure sine wave inverter, you can safely run:
Benefits of Pure Sine Wave Inverters
Pure sine wave inverters produce stable power with low harmonic distortion you can safely use with medical equipment. Such clean power output buys you peace of mind knowing that your expensive devices are safe from power disruptions.
As the voltage rises and falls, pure sine waves change their phase angle and polarity smoothly, with no abrupt drops. This reduces the annoying electrical noise coming from fluorescent lights, TVs, stereos, audio amplifiers, answering machines, fans, etc.
High Inductive Loads
Pure sine waves have the same properties as the grid voltage. This makes them perfect for appliances with AC motors, allowing them to effectively use more power. With a pure sine wave inverter, your microwaves, washers, dryers, and refrigerators will operate smoothly, more quietly, and much cooler.
Smooth Output Voltage
A pure sine wave inverter provides smooth output voltage, without choppy drops and surges. This allows your sensitive electronics to operate without glitches, crashes, or strange interruptions. It prevents glitches in computer monitors and weird printouts in laser printers.
Reduced Power Loss
With any power conversion, some energy is inevitably lost. However, a pure sine wave inverter is the most efficient way of converting DC electricity stored in your battery bank to AC electricity.
Drawbacks of Pure Sine Wave Inverters
Pure sine wave inverters cost more than modified sine wave inverters because of the sophisticated technology they use to generate cleaner electrical energy. The modified sine wave inverters will work just as fine with appliances that don’t need a rectifier and that can be powered by any regular DC adapter.
While pure sine wave inverters convert DC energy more efficiently than the other type of inverter, they are also more efficient in depleting your battery bank. The complex circuits, plus the transformer means your battery bank charge won’t last as long.
With the voltage transformer onboard, your pure sine wave inverter will weigh more than most modified sine wave inverters, watt-for-watt. Transformers are built with heavy magnetic cores, and there’s no way around it.
Difference Between Standalone Inverters and Inverter Chargers
The standalone inverter is the most common type of power inverter. It basically does just one thing — inverts DC power from your battery into AC power.
The inverter charger, on the other hand, can work as an inverter, transfer relay, and converter/charger — all in one.
Standalone inverters are available in sizes from 75 watts to 5,000 watts, and their price depends on the additional features. You can simply connect it to the battery, or “hardwire” it to use the existing outlets in your cabin, boat, or RV.
Inverter chargers are three-in-one units that automatically “detect” an outside source and go into charging mode. When the internal switch loses the outside power, it automatically returns to inverter power.
Standalone inverters are smaller than inverter chargers, so they’re ideal for camping or in the case of a power outage.
Inverter chargers offer unmatched convenience for RVs or boats in situations when you have the chance to top up your battery from an outside source.
Difference Between Pure Sine Wave Inverters and Modified Sine Wave Inverters
All inverters convert the input DC voltage into sine-wave AC output voltage.
The first inverters, however, didn’t really produce a perfect sine curve, but a rather choppy one called a modified sine wave. These were called modified sine wave inverters.
Their “blocky” AC voltage, however, works fine for simple devices that don’t rely on delicate electronics.
These modified sine wave inverters can be used for older devices such as old tube TVs and motors with brushes.
Pure sine wave inverters are the more advanced of the two, as they produce a more consistent output voltage.
This makes pure sine wave inverters safe to use with all devices.
If you’re connected to the grid and need an inverter only as a backup supply, you’ll need a pure sine wave inverter, because utilities provide pure sine wave voltage.
On the other hand, if you need to power an off-grid cabin with simple appliances, modified sine wave inverters will work fine and cost you less.
Yes, you need a pure sine wave inverter for medical equipment, AC motors, bright fluorescent lights, and audio systems.
Renogy makes the best pure sine inverters. Their products are well-made and reliable, which has been proven in both our tests and other users’ testimonies.
No, a modified sine wave inverter won’t damage your TV. However, you may experience interference, glitches, or audible noise when powering your TV with it.
The most trusted pure sine wave inverter brands are Renogy, Giandel, and EDECOA. Their products may seem more expensive upfront but are packed with useful functions and safety features.
Our Recommended Pure Sine Wave Inverter
If you're looking for the best option for your solar or power emergency system, I would definitely go with the Renogy 3000W 12V Pure Sine Wave Inverter Charger w/ LCD Display.
This little powerhouse has enough surge wattage to start virtually any device in your home, including AC motors. And it uses 12V as the source, so you can use it with a car battery, but also wire it to an AC distribution box for a more permanent setup, like in a cabin or boat.
I also especially appreciate the separate LED indicators for various functions.
This product from Renogy is an essential and reliable piece for every off-grid or grid-tie solar system, so my vote goes to this one.
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Renogy 3000W 12V Pure Sine Wave Inverter Charger w/ LCD Display
Our # 1 Pure Sine Wave Inverter
Nikola uses his background in electrical engineering to break down complex sustainability topics for GreenCitizen’s readers. He is a firm believer in environmental conservation, which he practices daily through recycling and home-grown food. He enjoys hiking, engaging in white-water sports, and collecting pocket knives.