6000XP VS Low Frequency Inverters. There's no contest.

If you want to install a high frequency inverter for your home with solar panels, click here to learn why some high frequency inverters are not legal to install. "6000xp is not UL9540 certified. YOU CANNOT LEGALLY install in the US along with solar panels." • 6000xp is not UL9540 c...
For a more detailed explanation regarding the use of high frequency inverters for charging an EV, please watch Solar Inverter Catastrophic Failure:
• Solar Inverter Catastr...
The high frequency technology that's used in all larger high frequency inverters is basically the same tech that's used in the Ecoflow portable power stations. Click here to learn how you can damage sensitive electronics when powering high inductance loads like power tools with any high frequency, transformerless inverter. • I ticked off a sponsor
Even with the discounts that Chinese manufacturers are offering, you’re literally throwing your money away when purchasing a low budget high frequency inverter that's available on today's market. The old saying, "Buy cheap, buy twice" rings especially true when buying these low budget high frequency inverter products. You may save some money up front when purchasing a high frequency inverter but you'll end up spending far more money in the end buying replacement inverters due to the short life expectancy of this type of inverter technology.
NEVER buy any inverter until you have confirmed that it includes low frequency, transformer based inverter technology in its design. With over 24 years of experience in the inverter repair industry, we know from experience that the vast majority of low cost, lightweight, Chinese made, high frequency inverters on the market simply don't last. Especially when powering inductive loads like refrigerators, microwave ovens, portable air conditioners, power tools, motors, washers and dryers.
As demonstrated by many of the paid, high frequency inverter hucksters on KZbin, You may be able to start some of these inductive loads when your high frequency inverter is new, but over time, typically after less than two years of repeated use, your lightweight, high frequency inverter WILL fail.
With only a 200% surge capacity, high frequency, transformerless inverters like the 6000 XP are simply not designed for repeatedly starting and running high inductance loads. For example, the 6kW, 6000 XP cannot start a 6kW motor load. A much better choice if you plan on powering inductive loads, would be to purchase an inverter that uses low frequency, transformer based technology in its design. Low frequency inverters can handle high surge loads for at least 3x (300%) their continuous rated capacity and they can do this repeatedly, without sustaining damages to their MOSFET transistors, for minutes, rather than the milliseconds that a high frequency inverter offers. That's why the big name brand inverter manufacturers like Schneider Electric, Sigineer Power, Outback Power, Magnum Energy, Victron Energy and others, all use a low frequency topology in their design.
Another consideration that is never mentioned by KZbin, inverter salespeople, is that the vast majority of these low budget high frequency inverters are difficult and costly to repair. Even before the warranty runs out, many consumers will not be able to afford to ship these units back (most of these manufacturers don't have US based service centers) to the manufacturer in China and have them repair or replace them. And at a typical shop rate of $125 per hour here in the US, with no schematic and limited parts availability, it won't makes economic sense to even attempt to repair one of these units.
Once the FETs have fried and have burned a good portion of the inverter's PCB, (And trust me, sooner rather than later, they will fry.) they basically become an expensive brick. A far better alternative is to invest less money and purchase a hybrid (MPPT solar charger included), low frequency, transformer based inverter charger and a few LFP battery and build your own reliable, higher peak power solar system. Low frequency transformer based solar generators last many years longer than the high frequency inverters, and can easily power high surge loads without being damaged and without damaging your appliances.

[@SrDelbioLima]

I thought there would be an american flag at the end of the video and the us anthem being played.

[@JamaicaGreenLantan]

The modern HF hybrid inverters perform much better now, they're more efficient and are more cost effective. I made the switch from a transformer based system years ago with zero regrets.

[@kickgas7171]

The topology that's used in modern high frequency inverters is no different than it was when they were first introduced 30 years ago. The only difference today is that the Chinese are building these high frequency inverters in larger boxes. They are still using the same design in their high voltage DC boost stage that uses high voltage stressed capacitors, silicon and tiny transformers which are subjected to high heat environments which explains its need for larger heatsinks and far more noisy cooling fans. The only thing that makes these high frequency inverters more cost effective is that they have removed the iron core, copper wound isolation transformer, which make these inverters far less safe for powering your home's appliances, And what good is efficiency if your inverter offers a much shorter life expectancy? You will have to replace a high frequency inverter at least 2 to 3 times over the course of the life of a well built low frequency inverter.

[@quickquote1568]

Post your evidence that modern high frequency inverters perform much better now. I bet you can't, because there is no credible evidence that they perform any better today.

[@gregben]

The large inrush (load's standpoint) current capacity of low frequency transformer inverters is rapidly becoming less important as pumps and HVAC/heat-pump compressors are transitioning to inverter driven motors which smoothly increase speed from the zero RPM with very low current surges. As a simple example, my LG refrigerator is inverter driven as is my Midea window AC/heat-pump. Every mini-split AC/heat-pump that I'm aware of is inverter driven, and are easily driven by HF inverter power supplies.

[@kickgas7171]

It will be many years if not decades before existing pumps and HVAC systems are completely replaced by newer inverter based systems. Besides, the upgrade to inverter based pumps and HVAC systems does nothing to address the absence of galvanic isolation between the DC boost stage and AC output in these low-cost high-frequency, transformerless inverters, which has the potential to damage and even start fires in these inverter based appliances.

[@Espiritiv]

@@kickgas7171 37 2017 HEAT PUMP IS INVERTER BASED....SO ITS NOT NEW TECH.

[@junkerzn7312]

​@@kickgas7171 But in modern times a lot of those people are not installing old power-hungry HVAC systems, they are installing mini-splits that use DC compressors and slow-start. The intersection of people installing old HVAC systems to be powered by an inverter is really quite low, and people who intend to run such systems from an inverter are far more cognizant of the issues involved. This has nothing to do with the billions of people with HVAC systems powered by the grid. It is a much smaller crowd.

[@solarcharging9743]

They're not installing these power hungry, non inveryer based HVAC systems in modern times because they're already installed in these homes. It will be decades before people get even close to replacing their old Power hungry HVAC systems with newer inverter based, high efficiency systems.

[@gandalfstormcrow9605]

I have been running a Growatt 12kw low frequency now for several years with 45kw of battery attached. It will start 3 AC units at a time!

[@quickquote1568]

Good choice, You can't go wrong with a low frequency inverter.

[@ThePonderi]

Nothing wrong with HF inverter as long as you size it properly. I have one that i bought in 2017 and noy 7 years running no issue. Size it properly

[@kickgas7171]

Actually there's a lot wrong with high frequency inverters. They offer much shorter life expectancies and far poorer surge capacities for starters. And don't you mean "oversize them properly at a greater expense". When using a low frequency, transformer based inverter, there's no need to oversize the inverter and it will provide much better performance for far less money than intentionally oversizing a light duty, high frequency inverter.

[@brooksstone2098]

The prices are outrageous, I can buy 2 for the cost of one

[@quickquote1568]

@@brooksstone2098 That's not true. A higher performance, longer lived 6000 Watt Sigineer M6048DUL, all-in-one, low frequency inverter costs only $350 more than a 6000 Watt 6000XP all-in-one inverter.

[@kickgas7171]

@@brooksstone2098 You'll probably end up buying two or three high frequency inverters due to their shorter life, over the life expectancy of a low frequency inverter, so in reality, you're not saving anything.

[@robertgrant5895]

@@kickgas7171 There is a lot wrong with low frequency inverters as well. They are expensive, very heavy, very big and inefficient. Use what is best for you and your application and your budget.

[@pitikaron]

Then why did my 2kw LF inverter only last for 4 years if it's true that the LF inverter would last 15 years?

[@solarcharging9743]

Probably because you purchased a low quality brand that uses cheap Chinese made MOSFETs and Caps.

[@ripvansparky]

just read the rest of the discription. that is false info, they are cheap and very easy to repair, with parts easily available. for the cost of a name brand complete system you can parallel so many cheap inverters they will rarely see much load. only real downside is high idle draw, but with the affordability of larger battery banks that is less of an issue.

[@kickgas7171]

I'm surprised by your comment, considering the fact that one of the only videos on your channel shows you performing a fairly complex diagnostic of a failed, high frequency inverter. High frequency inverters are absolutely NOT easy to repair. High frequency inverters all use the same complex, high voltage design that employs more than twice the number of components that low frequency inverters use. We repair inverters, have done so for the past 24 years, so we're quite familiar with how complicated these high frequency inverters are. Typically when they do fail, it's not as simple as replacing a few MOSFETs or caps. Because of the high voltages involved in these circuits, when they do fail, they typically take out far more components and can even burn the PCB. Not only are they difficult to repair, they can also be dangerous (lethal) for a layman to attempt to repair because of their use of very high voltage components.

[@naeemabbas3371]

Good❤ answer

[@turtle1723]

My microwave, fridge and AC are all inverter based. Modern appliances for modern inverter.

[@kickgas7171]

Sure they're inverter based. That's because the inverters that are used in these devices have been impedence and load matched to their loads. Off the shelf Chinese manufactured off grid inverters are NOT universally matched to inductive loads found in a typical home. They cannot be because high-frequency inverters don't use an isolation, output transformer to its MOSFETs or IGBTs.

[@junkerzn7312]

@@kickgas7171 You are confusing what he said. He's talking about the appliance, not the inverter. The APPLIANCE has an inverter... well, really its a DC regulator. For example, a modern mini-split has a DC compressor. A microwave does something similar to regulate the microwave output (continuous regulation rather than turning the emitter on and off every few seconds). The DC side has a power factor of 1. The AC side (the input to the appliance) will see a power factor of 0.95 if the DC regulator in the appliance is PFC corrected, and a relatively fixed PF of around 0.5 if it doesn't. NO LOAD OR IMPEDANCE MATCHING ON THE AC SIDE IS NECESSARY. An inverter driving such an appliance is going to have a far easier time... there won't be any significant surges and the reactive component, if any, will be constant. -Matt

[@solarcharging9743]

I don't think he's confusing anything. He said that these appliances have inverters in them that match the impedance of appliance' inductive load. High frequency, transformerless inverters are not impedance matched to efficiently power older, non inverter based inductive loads which shortens their life expectancy.

[@j4k3br4k3]

Wow, what a hit piece. You can make a good or bad high frequency inverter. You can also make a good or bad low frequency inverter.

[@quickquote1568]

Making a bad high frequency inverter is not an easy thing to do, given their much simpler and more reliable design.

[@quickquote1568]

There are several high quality brands of low frequency, transformer based inverters on the market that outperform the 6000XP. One brand in particular is called Sigineer Power. They've been around a lot longer than the EG4 brand and they offer much higher surge capacities and a longer life expectancy. They have built-in MPPT, automatic generator start and transfer switch and they're UL1741 & CSA22.2 Certified. Plus they're only $350 more than the 6000XP.

[@dswaggins2464]

You sure about that bud? Their screen suspiciously looks just like a voltronic unit. Worst fking inverter company in the world.

[@dswaggins2464]

Idle consumption of 120 watts. It’s a joke. The XP is 30 watts🤣. You need a whole extra battery to power this paper weight

[@quickquote1568]

@@dswaggins2464 Low frequency inverters don't draw 120 Watts when in "power saver mode" Just like high frequency inverters, they draw nearly zero Watts. The XP's lack of an isolation transformer makes it potentially far too dangerous of a product to use in my home.

[@kickgas7171]

@@dswaggins2464 Sure, high frequency, transformerless inverters from Voltronic are the worst, Voltronic is the company that built the EG4 6500EX inverter. Voltronic does not manufacture Sigineer inverters.

[@travismartinson1813]

Just get a Victron and get the best of both because their inverters are a hybrid version of the two different types.

[@Scat.original]

Whick model inverter that 120 volt AC as input?

[@Madsci-zy8wm]

Sigineer Power makes reliable low frequency, transformer based 120VAC input inverter chargers.

[@Scat.original]

This is what I want to know, I see on the site they have AC Input voltage MINUMUM 150Volt. Are there any for US AC Current, 120Volt AC input Split Phase 120/240 AC? I want to tie it to the US Grid for charging batteries at night.

[@Madsci-zy8wm]

@@Scat.original That's strange, This is what I see on their website. "Ac Input Voltage For Charger: Nominal 120Vac (90-135Vac+/-4%)" Unfortunately, if you want a split phase 120/240 Volt output, there are no inverters on the market that will take a 120 VAC input and output split phase 120/240 output. If you want a 120/240 Volt output, you will have to use an inverter with a 240 VAC input.

[@Scat.original]

@@Madsci-zy8wm Please provide a link to your statement, Thanks

[@Madsci-zy8wm]

@@Scat.original I don't think that youtube will allow me to post a link here,

[@howardescoffery4950]

You know what's funny? The component used in making inverters are most likely made in China. Secondly most American companies simple contract Chinese companies to make their inverters and apply their own brand to it. Oh and the cost difference $600 in comparison to $4000.

[@kickgas7171]

You know what's funny. There are several brands of high quality, Chinese made inverters that use high quality components that come from manufacturers from all over the world, including China. The difference is that these high quality inverter manufacturers don't build cheap, ligjtweight, high frequency, transformerless inverters. They build only high quality, low frequency, transformer based inverters that can be purchased on Amazon for less than $400.

[@patcha707]

This video not really going stop people from buying Chinese made inverter!

[@kickgas7171]

@@patcha707 We don't want to stop anyone from buying Chinese made inverters. Most Chinese made low frequency, transformer based inverters are awesome. It's only the Chinese made, high frequency inverters that are junk. You obviously didn't watch the video.

[@patcha707]

I watch the video

[@howardescoffery4950]

@@kickgas7171 When there are hidden agendas a person try to discourage another person. If I didn't watch the video, how could I respond? Currently I am using two high frequency inverters in my system and I have no issues.

[@sempertard]

Hey Kick, how to the rice inverters stack-up, as far as idle current goes, to low freq inverters?

[@Madsci-zy8wm]

Idle current used to be a concern when solar module and battery prices were so much higher, but since pricing has dropped to historically low levels, idle current consumption can be made up for by simply adding a single additional solar module to a system that uses a higher performance low frequency inverter. Besides, modern low frequency inverters allow you to place the inverter in power saver mode, which pretty much eliminates idle current. In any case, the much short life of a high frequency inverter and its far poorer surge rating makes it a poor investment when it comes to inverters. I would never install a high frequency inverter, no matter how much it's price has been discounted.

[@robertgrant5895]

@@Madsci-zy8wm There are HF inverters now with 10 year warranties. Your argument that adding solar panels can make up for inefficiency does not make sense. What about at night or on battery power? Look, the one of the most common components to fail in electronics is the power supply. In the old days these were almost always transformer based designs and they still failed regularly.

[@Madsci-zy8wm]

@@robertgrant5895 10 year warranties are meaningless when the manufacturer won't be around to honor them. I've seen dozens of RE equipment manufacturers go out of business and walk away from their warranties over the last 24 years that I've been in this business, And why doesn't supplementing the small increase in efficiency loss with a single, low cost extra solar module make sense to you? You produce extra power during daylight hours, with that extra solar module, store it in a battery and when use up that energy to make up for the difference in efficiency. Simple. And the most common components to fail in electronics is NOT the power supply. That's a ridiculous claim to make. Show me the source of the data for that claim. Bet you can't because the data doesn't exist.

[@robertgrant5895]

@@Madsci-zy8wm Sorry my friend, my source about power supplies is myself. I am a retired electrical engineer and designed and repaired solid state systems since the 80s. Usually the cheap chinese capacitors were to blame. So buy more panels, buy bigger batteries, etc.. Just spend more money and buy more. Do you have the space for all the panels? And what if there is a long storm or I live in a northern (southern climate)? And what about the weight of the darn inverter? Look, a low frequency inverter is not the right answer for everyone.

[@Madsci-zy8wm]

@@robertgrant5895 In the vast majority of cases you'll only have to install a high quality, low frequency once in 10 to 15 years, whereas you'd be lucky to get even 3 years of use out of a low cost, Chinese made high frequency inverter, meaning that you'd have to lift and re-install that cheap high frequency inverter 3 to as many as 5 times over the lifetime of a high quality low frequency inverter. And with all due respect, your education and experience in the design and repair of switching power supplies explains your misguided support for high frequency power devices. Switching power supplies typically use higher quality components in their construction due to their mission critical intended use and they're not typically used to power high inductance loads which would stress their components. High frequency inverters from China, typically use low quality components, especially FETs and Caps that yield a short life expectancy, especially when powering high inductance loads. And I'm not talking about a buying a "bunch" of solar modules and batteries, A single additional solar module and a few amp hours more of capacity in a battery will easily make up for the difference in efficiency between a low frequency and high frequency inverter. You may know a lot about switching power supply tech but you obviously know little about the real world design, repair and capabilities of modern power inverter tech. My 24 years of experience in the inverter repair industry (not even close to retirement) gives me the edge in this subject.

[@TheAnthonyBrandi]

cant you just take two 240v high frequency inverters and use a auto transformer

[@kickgas7171]

Connecting high frequency inverters to an auto transformer will only shorten the life of the FETs in the high frequency inverter.

[@johnkabila6617]

I have a LF simple inverter , indian made that has lasted more than 20 years. Check the indian technology and you will not go wrong.

[@solarcharging9743]

India builds awesome low frequency inverters.

[@heretic8449]

Bu*****t.... I Am running my whole house few years on Growatt 5000 ES HF inverter without one problem. Yes, LF technology is little bit better, but it is at least 3-times more expensive. I have also one Victron inverter. And this Victron LF had a problem with some inductive loads and small motors.

[@kickgas7171]

5kW? You must not have very many appliances in your home. I don't know where your getting your pricing information from, but the last time I checked, a low frequency, transformer based inverter charger with MPPT from a company like Sigineer Power, was only a few hundred dollars more than a light duty high frequency inverter charger.

[@heretic8449]

​@kickgas7171 At the time when I bought Growatt 5kw, 3KW Victron cost 1800€. I bought Growatt for €600. Those were my prices. I have 3 Growatt inverters. The fact is that most of the time, only one is switched on. And that's enough. I also use GBO AKU for maximum photovoltaic output, and Growatt has no problem with that.

[@heretic8449]

​@kickgas7171 and the input voltage from the solar was important for me. Growatt has a maximum input voltage of 430V. Victron Easysolar 2 has a maximum input voltage of 250V. With Growatt, smaller cables meant lower costs. Just by the way, today Victron Easysolar 2 5Kw costs €2335 +/-

[@noturbizz1]

so point is, we showed China how to make an inverter, they showed us how to make them affordable to sell them to US!

[@quickquote1568]

We never showed China how to make these unreliableble high frequency inverters. These junk inverters were always their creation.

[@kickgas7171]

Not quite. Chinese built high frequency inverters were never designed to be affordable. They are designed to be cheap, unsafe and shorter lasting imitations of real US designed low frequency inverters. So much so that you would have to buy at least two to three of these high frequency inverters to match the life expectancy and performance of a single low frequency inverter.

[@noturbizz1]

@@kickgas7171 I can't argue with you, or promote china's sales pitch on the usa. ATM I'm looking at the eg4 xp6000 wich is getting great reviews, does what it claims and is affordable without a bank loan. China has high end, and very very low end electronics. the tech is great , but do your research. buyer beware.

[@jamesshowalter6362]

“True inverter guy” makes AI infomercial???

[@kickgas7171]

It's not an infomercial. We're not selling anything. Only providing the truth.

[@panoss3524]

Pc, phone chargers, tv etc are with HF circuit and it doesn't made to last, but to be cheaper,ligher and smaller. There are now LF transformers from china with no copper inside they using them in LF ups because there are cheaper than HF ups! These transformers cannot work for more than a certain time because they will be destroyed by the high temperature. Τhe battery capacity losses will be very large, but with 2x7ah batteries it will not have time to be damaged. I have a HF inverter about 10 years, I fix it 2 times (new mosfets, capacitors, regulators). I am planning to change it to victron.

[@Madsci-zy8wm]

Transformers are not destroyed by high heat. There are millions of power transformers used by utility companies around the world that operate at high temperatures that last decades without any problems. And the battery capacity losses are not high when a low frequency inverter is placed in power saver mode. And you would not have had to fix your inverter 2 times in 10 years if it was a low frequency inverter.

[@junkerzn7312]

@@Madsci-zy8wm Heat might not cause the transformer to fail, but it sure as heck will shorten the life of the FETs and capacitors, which is the primary failure case for both LF and HF inverters. The heat is the same or similar for both designs (its a function of efficiency which is a more complex topic not necessarily tied to LF vs HF), and both designs also recover and reinject reactive power (so no real difference there). The only way to deal with the heat is to run the inverter (LF or HF) at lower load levels. One can make an argument that the additional capacitors in the HF design are more vulnerable to the heat, but that is primarily just a component quality issue, not really something inherent with "HF" vs "LF" beyond the addtional parts. One problem with LF designs, in fact, is that they are more difficult to cool due to the mass and bulk of the transformer and the need to damp the vibration. Heat is still the enemy for both designs.

[@Madsci-zy8wm]

@@junkerzn7312 The heat is far lower in low frequency inverters because they operate at much lower switching speeds. That's why high frequency inverter use larger heatsinks and higher CHM (louder) cooling fans. And a properly impedance matched transformer should generate much heat. At least the low frequency inverters that I've built don't.

[@junkerzn7312]

@@Madsci-zy8wm Lol, no.. that isn't how heat losses work in an inverter. Heat is entirely a function of the efficiency (this should be obvious if you think about it), so you can just look at the efficiencies of the various inverters. Higher efficiency, lower heat. Lower efficiency, higher heat. Very simple. Most of the heat comes from the magnetic components and the (Ron) of the FETs, which more or less scales with power and size. The reactive recovery circuit diodes also dissipate heat. Switching losses from a FET are certainly very real, but also miniscule because the switch time of a FET is typically less than 1 microsecond. It adds up, but not in the way you think. And FET performance is basically a function of cost. If you need lower FET losses you buy a higher quality FET. Generally speaking, other trade-offs tend to trump FET switching losses so the only time it really matters is in the absolute highest-quality (95%+ efficient) designs. -Matt

[@dswaggins2464]

They have been using lux branded inverters around the world without problems for a long time. The assessment of this video is wrong. Furthermore they are more affordable than the big name LF inverters.

[@kickgas7171]

I disagree. Search Google for "lux inverters fail" and you'll find many sites concerning Lux Power inverter failures and errors.

[@theguitarscout9802]

Do you have a link you could share of the Lux inverters catching fire? I can only seem to find anything related to error codes and battery charging issues. I’m in the market for one of these right now and if these are as much of a fire hazard as your video stated, I’m going to look at a LF.

[@dswaggins2464]

@@kickgas7171 purely anecdotal evidence. You will get similar results if you search victron inverter failures. Does this really mean anything? No. It just means that some units of every brand have defects.

[@kickgas7171]

@@theguitarscout9802 Here's a link to a video that explains why any high frequency, transformerless inverter can catch fire and set your appliances on fire.kzbin.info/www/bejne/qqGYoHeYqpueiLMsi=fpvFizCZ301196Fi

[@robertgrant5895]

@@kickgas7171 Search anything for failures and you will find sites with failures. Doesn't mean much. Look if these things were so bad they would not be so popular. Price alone does not explain it. Plus, I would thing UL and insurance companies would not cover a home with these inverters if they were so bad.

[@ripvansparky]

meh. HF inverters are so cheap and easy to parallel you can stack a bunch up. LF has its advantages and serious disadvantages, way too expensive to produce a lot of power being the first one. Not to mention the amazing convenience and value of the all in one inverters. Sorry but all the big name brand companies are falling way behind in inverter value. its ridiculous that they make you buy a bunch of large seperate components that are very expensive to get the same performance you can out of a few inexpensive AIO inverters.

[@kickgas7171]

You're behind the times. Low frequency inverters have been available for years at prices that are comparable to the cheap high frequency inverters, and they come in all-in-one configurations just like the high frequency units, only they last far, far longer and they offer a much higher surge capacity, so you don't have to stack several of them, like you have to do with the cheap high frequency inverters.

[@apr194828]

all these inverters or any electronics for that matter in made in china

[@kickgas7171]

The issue is not that they are made in China. There are many high quality, reliable, low frequency inverters that are made in China. The issue is the Inverters that use cheap high frequency, transformerless technology that offer poor surge capacities and short life expectancies that are made in China.

[@kickgas7171]

If you're interested in learning more about the technical reasons why a high frequency, transformerless inverters makes a poor and even potentially dangerous investment, watch this KZbin detailed video titled "Solar Inverter Catastrophic Failure" kzbin.info/www/bejne/qqGYoHeYqpueiLMsi=x3qWhsoZtYa37eP7

[@kickgas7171]

There is nothing theoretical about high frequency, transformerless inverters setting appliances on fire. It is already happening. May I suggest that you watch "catastrophic inverter failure' by Red Hill Labs to learn more about this issue. And insofar as an inverter transformer shorting out and catching fire, that scenario is pretty much an impossibility be cause the inverter's DC circuit breaker would trip long before the transformer would get hot enough to burn. Which would not be the case where a transformerless inverter passes DC current to an AC appliance and sets the appliance on fire.