High Frequency Vs. Low Frequency Inverters... Which is better?
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- เผยแพร่เมื่อ 15 มิ.ย. 2024
- High Frequency Vs. Low Frequency? Which Inverter is better?
00:00 - intro
00:43 - low frequency inverters
02:15 - High Frequency Inverters
03:17 - Comparison - วิทยาศาสตร์และเทคโนโลยี
You left out a some critical information when comparing low frequency versus high frequency inverter technology. First of all, modern low frequency inverters offer a higher efficiency rating than the values that you presented in your video. For example, the Schneider Electric XW6048 inverter charger offers a peak efficiency rating of 95.1%. The Outback Power FXR /VFXR inverter chargers, 93% peak efficiency. Magnum Energy PAE series inverter chargers 94% peak efficiency. Sigineer Power (a Chinese brand) 91% peak efficiency. And with energy storage and solar modules pricing currently at historically low levels, Inverter efficiency is no longer the critical issue that it used to be in stationary applications.
Second, I feel that surge capacity is a far important issue than what you've mentioned in your video. For example, inductive loads typically draw from 300% to 800% their nominal run current ratings just to get these loads started, and no high frequency, transformerless inverter on the market is capable of producing even a 300% surge rating. The max surge rating for a typical high frequency, transformerless inverter is only 150% to 200%. You might be able to start and run some high surge loads when these high frequency inverters are new, but every time you fire up one of those inductive loads, you're shortening the life of the MOSFETs in these inverters.
Third, High frequency, transformerless inverters have a much shorter life expectancy when compared to low frequency inverters. This is due to the amount of electrical stress that a high frequency inverter undergoes because of the inverter's much higher switching speeds. You would have to purchase 2 or 3 high frequency inverters to equal the life expectancy of a high quality low frequency inverter under continuous use applications.
And fourth is a safety issue with high frequency, transformerless inverters. Because there is no iron core, copper wound, output isolation, transformer in a high frequency inverter, all it would take is for the AC output monitoring circuitry to fail and one of the MOSFETs in the inverter's H-Bridge circuit to short to ground, and a high frequency inverters can send dangerous, high voltage, high amperage DC current straight to your connected AC loads which will not only damage most AC appliances but can even also set those AC appliances on fire.
In light of these reasons, In my professional opinion as an inverter repair tech for the past 24 years, I recommend the installation of a low frequency, transformer based inverter for off grid or conventional residential applications.
Thanks... detailed, good information. The lack of an isolation transformer is in my mind the most important point.
My Growatt 3000 is running strong for two years so far. I've seen people running some pretty hefty surges on EG4 hi-freqs, but time will tell how they hold up.
What are power frequency inverters? Seems like the newest kid on the block.
Not everyone needs a LF inverter. A good sized HF inverter for a home with mostly home appliances will be far better, costs, efficiency and noises
Great video. I love the explanation..
Thanks for your input Quickquote1568.
In what situation(s) do you recommend the usage of high frequency inverters?
Thanks
Thks
My 4,2kW HF inverter can't handle with 2kW compressor. Inrush current overloads the inverter and it shuts down.
Also, turning on a load, even an ordinary refrigerator, causes light to flicker.
HF inverters are loud, because of the fans turn on even at low load. LF inverters only hum and the fans turn on at high load.
HF inverters can't handle half-current (e.g., cheap hair dryers with 2 speeds, where diode cuts off half a sine wave).
LF inverters do not have these afflictions, which is why Victron Multiplus/Quattro is so popular (I wouldn't buy Victron myself).
My next inverter will be low frequency one.
Just out of curiosity, I'll like to know why you wouldn't buy a Victron.
@@adon8672 Victron is overprised. Also DC input from battery is limited, so You need more than one unit. I.e. I have 280Ah cells (LFP), I can provide 280A of current, but Victron can take only 100A.
Which one you have? Any good brand you have? Even chinese have good cheap ones.
@@rm6857 I have Daxtromn and it's a crap. But brand doesn't matter. Most of them are the same components, same production line, only sticker with brand name are different.
My next inverter probably will be Jnge JN-FI5000W@24V. And it's Chinese.
@@aldente_ Many of them are same. So you basically have the cheapest one? Good ones from china are cnswipower xijia
Given the number of small components and dependence on extreme cooling in an HF inverter can I trust it like an LF to last for years of abuse? HF has evolved over the last few years but so have LF inverters. I'm still skeptical when we are 100% off-grid.
It seems reasonable to trust LF for off-grid. My HF has been used daily for several years, but the tech is still too new to know how long they will last.
@@ReelClearMediaLLC what brand are you using?
@@Tiersmoke92555 A Growatt spf 300- TL-LVM 48.
Eventually, I'm considering upgrading to a EG4 6000XP. More power, plus I like the common neutral wiring and the built-in breakers.
120V is RMS not Peak, though.
Thanks...Yes, you are correct. I was trying to simplify for the graphics.
what about the difference between classic LF square transformer and Hybrid HF toroidal transformer(like victrton)@@ReelClearMediaLLC
This all wrong.! Ignore HF inverter uses high frequency square wave DCDC the steps up using HF transformer then makes HV AC then rectify ito HVDC the uses inverter
you say LF is not more necessary for big inductive loads?? and HF handle good . yes...but if you hav a massive pump that cycle 1000 thousand a day ? HF die in 1 year. low frequency last for life. And more, now have hybrid toroidal transformer inverter that are reliable like classic LF , handle a lot of inductive power, but the same efficiency of HF.
If they are a lot of good company that produce both LF and HF, is not true that LF is no more necessary
I have this doubt because I plan to power my house using solar. I use a lot of technology devices I currently have a backup for 120V but I want to cover the 240V too... Should I go with a single Split Phase 120/240 kit of Low Frequency inverters or go HF for 120V and LF for 240V? I have delicate electronic devices, the HF UPS is basically instant so my computers and TV doesn't turn off... Do they suffer or turn off with LF? I need to have a reliable backup.
@@ResumenExpress We run our entire home (TVs, Computers, Kitchen appliances, laundry, Tools, etc.) with an AIMS LF inverter. It has been six years. We will be upgrading to a larger LF inverter with modern features and our current will become a JIC.
What are POWER frequency inverters? Seems like the newest kid on the block.