Karcher K7 vs K5 vs K4, Review and Which one to Buy?
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- Опубліковано 2 кві 2021
- Review on Karcher Pressure washers, Whats the difference between
The Karcher K7 pressure washer
The Karcher K5 pressure washer
and The Karcher K4 pressure washer,
Should you buy a Karcher pressure washer, and which Karcher pressure washer to buy
My machine used Karcher K7 premium full control plus
For car-washing with a pressure washer watch this video • Best Snow foam lance f...
Karcher K series Pressure washers
Control Range
Karcher K7 Premium Full Control Plus Pressure washer as used amzn.to/3mfEln4
Karcher K5 Premium Full Control Plus Pressure washer amzn.to/3mhXOn7
USA K5 Link amzn.to/3opmtJl
Karcher K4 Premium Full Control Plus Pressure washer amzn.to/3fH9heP
Compact Range
Karcher K7 Compact pressure washer amzn.to/39D7d3K
Karcher K5 Compact pressure washer amzn.to/3sLUtiF
Karcher K4 Compact pressure washer amzn.to/3dAHIRY
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Many thanks for your support, regard Rich Man - Наука та технологія
The Pressure of the Karcher K7 is 180 Bar & The Flow is 550 Litres per hour as mentioned in my video, This information is also showing on the box, and in my documentation from karcher. It is also showing on Karcher's UK own website. Thank you for your comment
Thanks for the info!
@@RichManPoorTech How to UA-cam, tip #47: Only talk to yourself in the comments section if it's for comedy purposes
Another important factor to note, if your water pressure at home isn't great then the K7 for example is a waste of money.
Does the K7 full control Plus have the same gun as the K4 full control? As my K7 full control plus gun broke and I thought of swapping the K4 gun to the K7.
I appreciate the video, thank you. I am comparing the Karcher K5 Premium Power Control to the Karcher K7 Smart Control. Other than the extra 300PSI & 100 watts & what looks like a difference in the wand & some extra accessories, I can't really justify the $450 difference in price in Australia. Main purpose of use is cleaning hard floor surfaces at my house, i.e. concrete driveway & outdoor tiles/pavers. They both come with the Hard surface attachment so that's a plus. I have no interest in the Bluetooth feature, just a gimmick really. Am I missing something? Thanks.
Great demo, thanks! We have a K5.55 jubilee still working great after almost 15 years. For the next one I will go for one with the hose reel...
Thank you for your comment the hose real dose make it easier to store away
Hi mate great vid really well made. Im just wanting to buy a power washer for cleaning my car steps. And conservatory.
Should i get a k4 or a k5 and what snow foam gun is the best to get
Hi i suggest you watch my video ua-cam.com/video/H6eDRQNxi98/v-deo.html this compares the K2 K4 and K7 for car washing with snow foam and what you can expect, i use a MJJC pro canon in that video which is my favourite, the auto glym one isn't a bad choice either, but you can get better foam from mjjc, all links are also in that video
onto pressure washers, I feel, it is always better to have more power and flow and turn it down that not have enough, the k5 will allow you to clean quicker and clean/rinse from further away giving a larger fan but the k4 will be ok
I've had k4 compact,excellent machine, can do hose reel, but other that it's perfect
I got the k4 compact, it’s amazing!
Good choice 👍 It has a lot going for it, I don’t think karcher market them right
Which machine do you recommend for house washing? (Wooden house)
Thx for this video. The best Kärcher K7 review!🤌 Hope you get the 1000. subs soon.
Regards from Austria ✌️
Thanks a lot!
Thanks. The video is a bit rough, but then again so am I, so that is perfect. I started with a K2 and then as my son bought his first car, he did not want to use dads "good" Karcher, so I upgraded to the K3 and gave him the K2. As I started cleaning driveways and more, I upgraded to the K5, but not the full control Plus (It was not available at the time), and I have been kicking myself for not waiting and getting the Plus version. Now I have a few spare dollars and am considering the upgrade to the K7 full control plus, but dont know if it's really worth the upgrade for a bit more pressure and the all in one, but heavier, nozzle
Depending on your usage, the upgrade will be a bit like going from the K2 to the K3. I would say if you were thinking of the K7 or K5 then go for the K7, but as you already have the K5 then i would probably say just keep that. there is a smart control version where it connect to your mobile, but the though of dropping my £1000 smart phone with wet soapy hands i question the need for that
Had many problems, with the K5.. broken gun, tools not locking into the gun, intermittent power switch, then the dreaded frost despite being protected in a garage and covered… all in all living off the reputation of karcher from 20 years ago, ironically my parents 25 year old karcher is still going
Just a different motor isn't it from the k4 to k7? Unsure why they would have vastly different reliability
Newbie here, which would I need for small patio area, car and garden furniture connected to cold water supply? Cheers
I bought the k4 new series by watching the videos. It has no problems in washing the floor and car, but the drain opening apparatus does not work with pressure. I called the customer services many times to take it to the service, then I took it to the service, but this way it is without pressure.
It was said after the test they did that it worked. I can say that it was a failed apparatus. They did not receive a refund. My money was a baton.
Great review, very detailed and clear. Can't wait for the next one on karcher.
Thanks! 👍 i have other ones on the K4 and K2, and i have some on accessories coming
Why do Karcher continue to supply lances made for dwarves ?
If you have an older k2, is there a lance that still works with the detergent? Whenever I use a lance, the detergent doesn’t seem to come through?
Hi Martin not sure of what application you are looking at, but if its car washing check my video here and use a snow-foam lance ua-cam.com/video/H6eDRQNxi98/v-deo.html if it is general washing then sometimes it can take a bit to prime, if you have a lower power setting use that it help draw the chemicals in, check that there are no blockage in the hose that draws in the chemicals or dried soap gunk
@@RichManPoorTech thanks, what if you don't have a lance with a changeable power setting? Is that the issue here? do we just need the vario lance?
@@martinpalmer3575 its probably needs the input hose flushing, fill up squeeze bottle with water and pump it a few times with the pressure washer on, if it starts sucking place into the detergent
@@RichManPoorTech interestingly when I take the lance off entirely and just run the gun ‘naked’ as it were, with no attachments, only then is it sucking up the detergent. With the lance attachment on, doesn’t do it.
K5.91 how to removed and new fixing hose tell me idea
Hii@Rich Man Poor Tech, would you like to review the new MJJC foam cannon pro? Thanks.
Thanks for comment, could be a possibility all Business enquiries though email info@richmanpoor.com
@@RichManPoorTech Sure. I have sent you an Email, please kindly check it out. Thanks.
MJJC foam cannons are awesome
Thank you very much!👍💯
Your welcome, thanks for watching
Hi Rich Man Poor Tech, thanks for the helpful video. I am thinking to buy K4 but am unsure about a point, please see if you could help. The intention is to clean house/building walls using K4, how good it is to clean painted walls, and how high the water could go? Would it cover a two-story building with sufficient pressure to clean the high-reaching areas such as the eaves? Many thanks
if your cleaning outside walls then you can get a wall attachment a bit like a brush on a long pole to help you reach and clean efficiently, i have one but haven't got around to a video on that yet it also dose windows
I have one of these full control but really not impressed. the machine on full spray seems to start and stop with no rower. When on the dirt blasting selection power is full? No idea what can cause is. Can the lance and gun be swapped on these units for a standard gun?
Check that you are not using stop connectors on hose or that there are no leaks in your supply / hose, if not maybe you have a fault with the gun or machine
G'day Rich Man, can you please confirm if the Karcher K7 has a plastic pump like the other models? Or is this the first domestic Karcher with a metal pump? Also does the Karcher K7 have a steel braided hose? Thanks.
Probably plastic.. karcher models are badly designed now.. I’ve had problems with mine, if you have frost in Aus don’t buy it, you have to protect from frost
Hi looking to buy a pressure washer mainly for block paving and patio slabs. What would you recommend budget is £500 max
Get the engine one atleast 180 bars
가성비가 좋아보여 K5 결정했습니다.!
갖고 싶은건 HD 6/13C
K5는 좋은 선택이고 HD6/130은 많이 사용하면 좋은 산업 기계이지만 가정용으로 사용하려면 K 시리즈가 더 저렴한 액세서리로 좋습니다.
I basically need one for my patio paving stones only,it’s a large area,so confusing which one to get,any recommendations please sir
They all cans do a patio but as the size goes up then it’s a lot quicker, although you can have a T-race that can clean patios I tend to mainly just use the gun, k7 have Longer hoses over something like a k5 compact hoses so again this makes your life easier and a dirt blaster nozzle can help with tough cleaning and the k7 show has it built into one Lance it really depends on your budget if price isn’t a concern the I would recommend the k7, but if space or cost is more important the a k5 would probably do well, and any in between are filling the gaps, I also may choose a larger compact model over a smaller non compact version
Hi, I have read that a stop connector can damage a pressure washer. What particular connector do you use? Thank you
When using my pressure washer's i usually have them connected to a straight through push on connector which is recommended, the connector that i use is from Karche ramzn.to/3xdbdTH which i find is reliable and don't leak, and i have it connected to a 3/4 inch 19mm hose also from Karcher,
I don't have anything to do with Karcher but i tend to like there products
in the video i had it connected to my garden hose system which is a 1/2 inch about 12.7mm hose and it was connected to a Karcher water stop connector,
i would recommend using a straight through connector, water stop / aqua stop connectors can have a habit of pulsing the water supply that can put more strain on the pump/motor, but to be honest i couldn't be bothered to disconnect the 3/4 inch hose with straight through connectors that i use for my pressure washer to bring it into the rear garden for the demonstration of this video, if you see my car washing video ua-cam.com/video/H6eDRQNxi98/v-deo.html then i am using the 3/4 inch hose with the straight through connectors in that video
What’s your opinion on the Karcher 6/13? Looking at a new pressure washer & I’m not interested in the K series.
I rate the HD range highly, yes its more expensive, but for every day use i have found it reliable, good lance, not too noisy, i used mine mainly for washing down excavators, before being transported by road, and i couldn't fault it, apart from the extras for hd series also cost more
Great vid mate explaining about it 👍 question could I add a bleach solution to the detergent dispenser ?
I have a pressure washer. Gerni 7000 its heavy and doesn't seem to have much pressure when using the patio cleaning brush even thoe it has 2175 psi So I think I'm going to get my money back and get a k7 👍
And also I noticed that the karcher has better extension hoses
there are a few versions of the K7,
the compact you pull a hose into the cleaning solution where as the power and control models, take a karcher cleaning solution bottle upside down as show in this video , if you have a bottle you can refill with a larger karcher cleaning solution eg 5l, or as i have, use your own cleaning solution,
all cleaning solutions in all the pressure washers i have used (different makes), is usually supplied with less pressure than when using full power setting, allowing to agitate before full power washing off. as a alternative you could also use a external foam canon with your cleaning solution in that, this is what i do for cleaning cars as you want clean water for rinsing
Maybe for a video, but what maximum length 3rd party non kink hoses would suit best, I.e. would a 15m (same diameter) non kink hose loose pressure on a 500l flow rate compared to its karcher 10m hose?
Ps great video 👍
hi i don't have any official figures, but what i do know from may days dealing with large industrial machines in quarries, is that all pumps have figures relating to maximum hight and distance, so adding length to the hose will have an effect on flow and pressure, it is up to you if this is a benefit ie longer hose, or a negative ie less flow and pressure.
now on my industrial karcher HDS801 steam pressure washer, i have a 10 or 15m extension hose,
when i attach it i don't notice any difference in cleaning myself, i just notice it takes longer to heat the water and for the detergent to either come through or stop coming through when i turn it off
Hope this helps
@@RichManPoorTech hi that explains it perfectly, many thanks for taking the time to reply its greatly appreciated. I think what I may do is try a bigger cross sectional non kink hose adding 5 metres, may reduce the life of the pump as it has to pump harder, but will give it a go! Thanks!
I added a 15m third party hose to a K4.
There is no noticeable loss in pressure.
Great informative video 👍
thanks for your comment
What better karcher k3vs k5?
Bro I want to your help can you tell me k3 can I use in 220 voltage o no
on your serial plate it should show you a voltage range 220-240V 50Hz if bought in europe/UK for example, usa and i think canada and mexico versions will show different voltage with 60htz, So presuming you have or are getting say a european model then it should be rated for 220 volts
As i;m actually a qualified electrician i will elaborate more
here in the UK items were rebranded 230v from 240v volts to have a european standardisation, France Germany etc should have done the same from 220Volts to rated 230Volts even thought the power generation did not change in either countries, in fact at my plug sockets the voltage is actually 251 volts and everything rated at 230 volts or 220v works completely fine, electric is produced at higher volts allowing for voltage drop over the cables by the time it reaches properties just make sure if your supply is 50hts then your k3 needs to be 50htz don't mix usa and rest of the world htz
Hi I can't really tell what model my kracher, and I can't figure out how to use the soap dispenser
The soap dispenser is at the top
look for a serial number plate/sticker, on there it should have a model number or name, if it has name like K2 K4 than thats your model, if it has a number like 1.673-122.0 then put that in google and see what comes up that was for a K2 compact
Good job made of a complicated subject range. I was a bit baffled by some of the Karcher pressure washers until I watched this, Compact, Full Control, Power Control and goodness knows how many other variants put my head in a spin! For me to use to detail mine and family cars I think the K4 Power Control seems about spot on 👍
Glad it helped the k4 is a good choice, if your looking at washing cars then watch my video ua-cam.com/video/H6eDRQNxi98/v-deo.html i have a comparison on washing cars with the K2 K4 and K7
@@RichManPoorTech watched it straight after the last one, another excellent video that convinced me even more than the K4 is just right for me
@@steverabbits Thank you for your comment, i hope you enjoy it
Great, many thanks ! It is a comprehensive explanation of the Karcher series.
So, after the interesting discussion in the comments, shall we turn on the power at the socket or to first switch on at the machine ?
I alway power socket 1st then switch on the machine second, i still have all my machines back to 35 years working, this is something i learnt when working on delicate main-frame computers, and industrial machines like welders compressor's etc
@@RichManPoorTechThanks. I shall stick to that.
Since reading your review, I chose K5. It is excellent on patio slabs. Long time moss and algal stains were removed in an instant. Previously bleach, acid or soda didn't work. K5 classic is good value for money !
Does K7 have metal pump ?
Hi is k4 good choice to cleaning wooden decking and one per months cleaning my car?
yes, when cleaning you car you need to do a contact was as with any pressure washer, i have a video showing this
Thanks Rich!
Your welcome, I hope it helped you
Which would you recommendedfor a k4 full control & is it worth it?
I hard question to answer as there is both pros and cons for all, i also don't know what your main usage is, eg car cleaning or home, or a equal mix of both. how long your weekly or monthly usage is, or your budget etc if your looking at car cleaning then watch this video ua-cam.com/video/H6eDRQNxi98/v-deo.html. that might help you, my general recommendation is buy the K4 model upwards, The k4 is a good step up in quality from the k2 and k3, both in power control and compact version, i personally would buy a more powerful compact over a less powerful home or power control version myself, as they allow you to clean quicker, although if you want a tracer for patios etc, or prefer to drop in chemicals then the home version may be better suited to you, my recommendation for my mother for example would be a K2 compact for her car, this is due to her age and physical strength, as the larger machines also go up in weight and would be more difficult for her to set up and pack away.
but as you can see if you watch my channel i have a K2 K3 K4 K7, a HD 6/13c and a HDS801 eco, i mainly use my k7 power control at home for washing my car and more powerful jobs, as it has a longer hose, although if its in the back of the garage i will grab the k4 if im washing the car as it is easier to get out and is capable for the intended use, sorry Im not trying to sit on the fence, but i hope i have given you more information to help you choose the one for your needs
Karcher tell you not to use hose connectors that has a aqua stop feature instead they suggest one that has free flow . The aqua stop can damage the motor .
well said, I have those on my hose that i usually connect my pressure washer to, also i have a larger diameter hose to connect my pressure washers to, this can help a-lot with water flow especially on the K5 and K7
My K3 has died, im thinking to upgrade to a K4 but for a little more can stretch to the K5. Do you think the pressure difference would be noticeable? Mainly used for car detailing and snow foam
Watch my video
Best Snow foam lance for Karcher K2, K4, & K7 ua-cam.com/video/H6eDRQNxi98/v-deo.html
Showing the difference between these machines, sometimes the price difference can be minimal then I would choose the bigger machine, check out hose length as longer hose probably be more useful than the higher pressure for car cleaning, larger machine would also mean quicker washing, but this is also minimal for car washing, k4 and k5 both have the water cooled pump which is better than on your previous k3
Good review and helped me make up my mind on which model to buy. One thing though is the user manual warns on page 7 (for the K5 anyway) not to use aquastop connectors on the feed hose connection to the unit, which I think you're using at 5:44.
yes you are right
i use straight through connectors usually,
i just grabbed a garden hose that was nearest while i was making the video with out thinking
any idea why its not allowed?? how could it make any difference?
@@tomtebloss89 My understanding is It acts as a non-return valve, which prevents the pump from regulating inlet pressure when the pump starts and stops. The result will be cracked inlet pipes or pump bodies.
@@nileynet hm ok, i though the valve is always opened when its connected?
@@tomtebloss89 That's correct, so it's not a non-return value in the truest sense. What happens is because the trigger does not control the motor directly, the pump continues to run for a fraction of a second after the trigger is released, until the pressure switch cuts it out. This builds excess pressure in the pump, which is designed to release the pressure back to the low pressure side of the pump. That pressure surge is meant to be absorbed by the hose connected to the inlet (older pressure washers even has a specified length of hose that it must be connected to). The restrictive size of the channel for the water to flow in a aquastop-style connector means the pressure can't be released back to the inlet hose fast enough to avoid over-pressure on the pump & inlet components. Think of the inlet hose as a buffer and the aquastop connector as a restriction to that buffer.
I like your channel name!!!
Thank you
Hi!
Which Katcher would you recommend for a pressure washing business?
Thanks in advance!
Hi as your a pressure washer business then you will need a commercial unit, the K series domestic units are not designed for constant cleaning day in day out where as the commercial units are, remember that as a business then you would probably be doing 1 year of domestic cleaning in 1 to 2 weeks of commercial cleaning.
also what type of cleaning will determine what type of washer
Do you need 110V?
Do you need mobile power? eg a petrol version
Do you need steam?,
is it for food preparation?
For example i have a HDS steam cleaner which is equivalent to a HDS6/13 at about £2,500.00 which would be over kill for cars
i have a HD6/13 cold, which is still probably over kill you could maybe use a HD5/12 for cars
and the k series i use at home,
I am not a affiliate of karcher, but i do like there products, best to google "Karcher centre" for your local commercial dealer, and tell them i sent you and im sure they could help you more
@@RichManPoorTech thanks for getting back to me! It would be for driveways mainly... What would be your recommendation?
@@SuperPadderz check out Kranzle. Karcher is just about marketing
Hi, is the K3 compact a good choice or should I get the bigger K4?
K3 is 200€ in my country
My own personal opinion I would recommend the K4 over the k3, mainly to do with having a water cooled pump
I just bought a k3 to replace my k3.97. The k3 is crap, cheaply made and low power. I'd buy something else
Thanks for the usefull video. Kär (with the two dots on the a), is pronounced CARE. I cannot explain in written how to pronounche the CHER part.
I know as I’ve worked with customers in many countries, I’m actually Mann not man, but most people in U.K. say Kärcher as KAR not KÄR, the same way a Porsche is said here as Porsch. As we don’t use accents in English
Would the K7 run ok from a water tank in the back of a van?
I’ve not done it myself but I do believe it will, I know you can get something for water butts but I believe if you have water high enough to prime the pump then it will work as is
nice ladder in garden any info on that?
Yes i was going to do a video on that, it is a telesteps 3m combi ladder (steps & lean to) amzn.to/3x4yOnO
they also do a 2.3m one amzn.to/3uZNvHk
I found i could fit it in a renault kangoo van or boot of my car without having to have a ladder rack
@@RichManPoorTech nice one thanks
@@1977JohnBoy your welcome
thanks
You're welcome!
Hi.ther is the karcher k7 gun work on k5
The gun works over Bluetooth to the machine, best to check on the karcher website to see comparability
Which one is more silent
How does the power button Turn on the gun on the k7
You just pull the trigger on the gun like any other pressure washer, the power selector on the Lance speaks to the pressure washer via Bluetooth
Ok thanks I tried all that the first timeI can turn the pressure up or down on the gun because it won't come on
can you put a gun from k7 to k4 full control
the K7 gun shown, works via bluetooth so your machine would have the Bluetooth control
Good review very informative i have recently made the mistake of buying a k4 I find it not powerful enough for washing cars it’s actually less powerful than my cheap £60 b&q one I wish I’d seen this video before I bought it 🙈
watch my video ua-cam.com/video/H6eDRQNxi98/v-deo.html i compare the K2 K4 & K7 for washing cars quickly, the K4 will be good enough as with any pressure washer you always need a contact wash
@@RichManPoorTech great video i spoke to karcher today and they have said mine sounds faulty and I’ve took it back to the shop already
I had an old one from b&q for 5 years only £60 it was twice the power of my k4
Maybe I should go for the k7 that looks a more impressive machine
Great video 👍👍
I prefer k7, owing to flow and pressure, but it is quite large and heavy compared to the k4, just to let you know
I really wish Karcher would make the hose so its doesnt get tangled easy, i have a K5 full premium
I know what you mean they need some kind of swivel connector
K7 hard to wind in AND should have a separate facility to house the electric cable.
Wanted the K7 but had to settle for the K5 due to the K7 not being available anywhere near me or on Amazon but only on Amazon UK and it was another 500+ dollars just for the shipping
the K5 is also a good machine, im sure you will be happy
Been looking at the k5 compact from a k2 for weekend warrior time on the karcher outlet, seems they don't have much faith in themselves with only 6 month warranty, granted they may be refurbs, there's hardly much to refurb on the kit. Bit off putting.
i have purchase from them myself before and i have found nothing wrong with them, it is usually old stock or returned stock
Which one is better for industry
If you’re on about commercial use then get a HD version like Hd6/12 etc
I got a Karcher K4 in February 2021 and by May 2021 the pressure failed. It was returned to B & Q with no trouble whatsoever for a full refund.
sounds like good customer service from B&Q
Turning the machine on at the socket outlet is the same as turning it on at the machine so far as the machine is concerned, it is a full isolation switch for power and control circuits. There are advantages to both.
Turning on at the wall will wear out the socket outlet contact tips but not in an undue fashion, they are designed for it. Replacing a S/O is cheap.
Switching at the machine isolator will wear out the machine switch contacts. Replacing this is costly.
Switching a socket outlet with potentially wet hands when using washing equipment is just dumb. The karcher isolator switch is designed to be safe with wet hands.
You choose.
Being both a Electrical engineer and a computer engineer, i have always been told that both highly sensitive equipments and powerful motors, are always best to controlled from the power switch on the device owing to a possible power surge or spike, especially as motors get more powerful and are wired in star or delta configurations, and because of this i have always followed the principal of switch of the machine at the intended switch
A star delta single phase motor? Are you sure you’re an electrician 🤣🤣🤣
@@Ewecnt sorry I stated large motors star or delta refers to larger 3phase motor winding found on larger motors, sorry for any confusion
Fair enough bud I got that if I’m honest.
It still remains that switching upstream of an isolator is perfectly safe for the pressure washer. The main isolator on the karcher is a 2 pole isolation switch so for internal maintenance and true isolation it is a safer option, anyone working on a machine with a plug and lead who doesn’t unplug it though deserves what they get, so classification of isolator is a bit of a null point really.
For every day switching the machine will not be able to tell the difference. In fact a 2 pole isolator will have a higher frequency of contact bounce during turn on due to increased bounce events, so it will create more noise in the supply than switching at the outlet with a single pole switch, I assure you this noise will be negated in the machine itself with simple suppression circuitry to protect any electronics. And due to something referred to as racing contacts no mechanical switch will close both poles simultaneously, the net result being the same as using a single pole switch.
Any open circuit with single or double pole interruption will stop current flow dead. Research Kerchoff’s current and voltage laws and ohms law, they are very basic building blocks that display what I mean.
Supply start up noise for motors is the least of their worries, motors are a robust animal and deal with some real drama during their normal running. They create more noise than the switch does!
Let’s also consider that this is an AC machine. So it has no reference of phase or neutral only amplitude of the sine wave. Every 1:100th of a second the supply changes to an inverted half wave making it impossible for the machine to control direction of current on start up. It really doesn’t matter which pole you close last it’s 50:50 if you close it on a positive or negative half cycle. You can’t control the amplitude of the wave at which you close the contacts either, that is something only an inverter can do by controlling frequency and voltage thru out start up and during running to limit voltage and current independently, they have different rates and graphs on start up dependant on the type of machine and motor and can also be custom set but rarely are. An inverter doesn’t care about start up voltages any more than a motor either, they simply take AC, rectify it on to a DC bus then use thyristors to turn that DC in to stepped AC at variable frequencies and amplitudes (you can’t alter AC frequency without turning it into DC first) Inverters are terrible animals and kick out harmonic noise aplenty. Inverters give a motor a hard time due to the stepped wave forms they produce too, but motors don’t care. You know how you can calculate the area under a sine wave using calculus (you do if you’re and electrical engineer), the infinity theory, well that doesn’t apply to inverter outputs as they are not true sine wave outputs, not even ones that claim they are! And in industry we don’t run large motors on ‘true sine wave’ inverters but that’s another topic in itself. Inverters employ signal conditioning filters in their supply to prevent noise entering the mains from the inverter as opposed to the other way around.
Let’s go back to large 3 phase machinery. To reduce harmonics fed back into the supply from inverters you commonly use a three phase transformer with a dual wound secondary, so delta star star. This allows you to load the star and delta wound secondary windings equally with your inverters. The 3rd and 7th harmonic cancel out as they are inverted mirrors of each other at a shifted phase angle directly in agreement with the phase shift between the secondary transformer windings. All other harmonics are added together algebraically resulting in lower total noise returned to the distribution network. NONE of this would harm or protect your motors in any significant way!
Any electronics in the pressure washer will have sufficient smoothing in their power supply circuit to remove noise from switching and the motor they are associated with.
I spent 9 years at university studying electrical and electronic theory. I work in heavy industry as an electrical technician, I can’t claim to be an engineer as I don’t pay into a governing body but I do have 30 years field experience and the relevant qualifications. The term engineer is a protected thing in much of Europe, like the word doctor. The kid who swaps your wiper blades at Halfords is what they call an engineer to make customers feel valued, the plumber who swaps a radiator calls himself a heating engineer. Why not a doctor of heating? To most people the term engineer is without value in this country these days.
But all the same I liked your review and gave it a thumbs up. 👍 And if you have wet hands it’s wise to use the switch on the machine!!
What does ,,plus" mean? Full controll premium ,,plus"?
Anything after the model number is spec of the extras or attachments, in this case it is to do with the attached Bluetooth gun (not Bluetooth app control this is a different spec)
I thought this was a parody at first. Fair play
i don't know what to say thanks for the comment
Thank you so much for the information. Can i ask you something , I want to start a business of Car wash , which machine would you advise me to buy ? since I am beginner
a lot depends on your budget and how many cars you are cleaning and if you want to be portable etc, i have a hds801 eco steam at work but to be fair that is overkill, plus you would wash bodywork over 50 degrees anyway a Karcher hd6/13c or 5/12c is good if your using it day in day out a couple of times per day, as they have more expensive brass pumps, if your more budget conscious and just starting then K5 or K7 may be your choice but these wont last as long as the professional versions, they aren't designed to be used all day but could generate you a nice income to start with,
If using a snow-form lance then you get better snow with a higher pressure and flow i will be doing a video on this in a few weeks
@@RichManPoorTech Thank you so much for your advice . With my budget i think i can get K5
Tôi muốn mua một cái với mục đích chỉ để rửa xe ô tô trong gia đình. Theo bạn tôi nên mua K4 hay K5. Cảm ơn Bạn rất nhiều!
để rửa xe cả K4 và K5 đều là máy tốt, tôi luôn khuyên bạn nên lấy phiên bản mạnh hơn.
bạn cần phải rửa tiếp xúc với bất kỳ máy phun rửa áp lực nào, và một ý tưởng hay là tạo bọt tuyết tốt, tôi có một video cho thấy điều này với k2 k4 và k7
Cảm ơn bạn rất nhiều!
chào mừng bạn
7.55 ... Ghostbuster
So I've only used this pressure washer one time. ua-cam.com/users/postUgkxfQauTxLT0JLSvqkq10rD79TU4k0Vz8zP The one time I used it, it worked great. I recently had new siding installed but kept the old gutters and small areas surrounding my house that weren't replaced so they looked horrible and dirty because of the new siding. I needed to get it cleaned asap. When I used the pressure washer, man it just melted all the dirt and grime that was on those areas of my house. I used that krud kutter soap and it was over after that. Easy to assemble, feels durable, very simple to use. Also, I purchased a used one to save money and there was absolutely nothing wrong with it. I want to get more use out of it so I think I'll be washing the cars and update this comment as time goes on.
I believe there is a little bit of false advertising when you put the K7 Compact to the test. When testing with a pressure gauge straight out of the output of the pump I got a Maximum of 2150PSI (148 bar) before it trips out the pressure switch. 8l/minute MAX (480l/hr). Don't get me wrong its still a very powerful unit for an electric single phase but I don't like the fact that all these electric units never really put real specs and get away with it
I agree, all domestic pressure washers from different brands do this maximum pump pressure, so for comparison Karcher do the same. As I mentioned in the video it is maximum pump pressure. A bit like cars engine bho to actually bhp
. Karcher commercial range show working pressure
Dewalt also do the same thing with the 20v max range, to compete wit other US brands, these are exactly the same as 18v xr range sold throughout the rest of the world
@@RichManPoorTech thanks for the reply. Totally agreed about the industry specs and what they get away with.
@@RichManPoorTech I finally did a video testing the psi and flow and in the end it does what it is rated at so this is one unit I can reccomend. I just posted it if you want to see some amature review! ua-cam.com/video/Fz4z55FhXgU/v-deo.html
You shouldn’t use hot water on your car, it strips waxes and sealants from your paint.
Let the right chemicals remove the dirt and grease.
Indonesia hadir menyimak👍👍
The K7 is 160bar at 600l/hr.
The Pressure of the Karcher K7 is 180 Bar & The Flow is 550 Litres per hour as mentioned in my video, This information is also showing on the box, and in my documentation from karcher. It is also showing on Karcher's UK own website. Thank you for your comment
I have seen that flow on Karcher's International website is 600 litres per hour, which differers from the Karcher's UK website of 550 litres per hour and on my documentation which also states 550 litres per hour, the Max pressure is stated at 180 Bar on both websites, and in my documentation thank you for your comment
Could differ in the UK. I had 160/600 on docs I got from the agency. Double checked on Kärcher’s website now and it’s 160/600.
Might be different production factories
bluetooth pressure washer lances fill me with fear. I went with K7 compact that does away with that rubbish.
Owning some karcher pressure washers doesn't mean you know a lot about pressure washers, I don't think you'd use karcher if you knew a lot
so what would you use. Sounds like you claim to know a lot
Hmm...Why do you have 3...? Just a question...
I actually have 7, The 290 was my wife’s when I met her and I already had a k3 at the time, I bought a hd6/13 for work.
I then added a HDS801 eco Hot/steam at work,.and my farther took the HD to his house.
After using the more powerful versions at work I then purchased the K7 premium for myself at home and also to do a UA-cam video on,
The k4 & k2 compacts were bought to do UA-cam videos on, and I’m giving the K2 to my mum as it’s light for her to use, and also keeping the k4 compact myself to carry about in the boot of my car if I have to go to another property, they are still all working
My Karcher K5 is broken.after 4 years and no warranty cover.
Never lasts.
sorry to here that, I have had my oldest karcher for about 30 years,
one of the main problems with any pressure washers is (stop-lock) hose connectors that can be disconnected and stop the water, they can cause pulsing at the motor, always use straight through connectors
The K5. Bad quality. Mine stopped working after few years. With little use. I have cared for it all the right ways. Very expensive.
Get a Honda gx390 evolution 2 or : if h want a reliable and good pressure washer you get what you pay for at the end of the day you buy cheep you get shit
depends on what you need, that evolution 2 is less than half the price of my karcher hds, but alot more than my karcher HD6/13,
@@RichManPoorTech your not seriously talking to me about a karcher 😂 ffs 🤦🏻♂️Honda or briggs all the way
@@Rivaboyz1987 Honda and Briggs are both engines, I cold also throw in Kohler Lister pettter and lombardini engines, these are often paired with either a pump, a generator, or a non domestic pressure washers pump, and as such would pair more against Hd and HD’s range of Karcher, not the domestic K series range.
If you wanted a petrol powered one you could choose a Karcher hd 9/23 G for example
If you are comparing like to like then yes I still like Kärcher, but there is a huge gulf between a Karcher K2 and a Karcher hds 17/200 tr1 for example
Ive seen alot of bad reviews on k7
i have heard of poor reviews on all pressure washers by all makes, but in my own experience i have never had a problem with any of my karcher pressure washers
Gone through 2 of these. Cheap junk.
Are you using them commercially ? as all mine from a time frame spanning 30 years still work
Mine is also broken in 3 years and i used it may be 30 times at all. K7 full control. Now service demands half of the new price for repairing it.
Have mine for over 20 years
Looks like a toy compared to kränzle
Kranzle tend to be aimed more against Karcher HD range that the k series range, I looked at one before I purchased my Karcher HD6-13
The range is so narrow i will never buy this
What do you mean by narrow range
@@RichManPoorTech where the water comes om the surface is just a lil spot, it will take more time to clean it. Ofc if you have enough time sure buy it but i just need quick work
@@mofromupside2573 ok, I thought you were on about the rang of Karcher pressure washers, as they do over 40 different models, with the k series just being domestic range
Probably a good review but this chap is sloooowwww and wouldn’t get to the point readily enough. Weetabix needed maybe….
I bow down you your superior videography and editing,
ps my 10yr old daughter has more subscribers than you
Boring don’t want to know about the other ones I thought it was k5 v k7 you’ve sent me a sleep
im glad you foun a use for it