EGO Power+ PRESSURE WASHER

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This conversation has been merged. Please reference the main conversation: Pressure washer

I'm really tired of dealing with my plug-in electric pressure washer. Unraveling the power cord, unraveling the garden hose and connecting it, unraveling and connecting the high pressure hose, being limited to the length of the cords and hoses, etc.
I really need a Electric Cordless Pressure Washer :) It needs to have built-in storage for the high pressure hose (or eliminate the need for it). It would need a water resistant compartment for the battery. I'd like it to have more pressure than a plug-in electric washer (~1700psi). It would be awesome if it could be >2500psi. I'd still need a hose for the fresh water, but maybe a skinny light weight hose could be used for that since we're only dealing with 1-2 gpm flow rates.
I've done some calculations, and this should be doable with the 5Ah battery. A plug-in electric pressure washer probably draws about 10A at 120v, for 1200W. For the same 1200W power draw on a cordless pressure washer with a 56v battery, the current should be ~21.4A, which is just over a 4C discharge rate. A 4C discharge rate would provide over an hour of continuous spraying. I feel that just a half hour of continuous spraying would still be in-line with most peoples' expectations. Increasing the power and using a brushless motor should easily get the pressure over 2000psi and have more than 1/2 hour of continuous use battery life.

I have several tools right now, and am very happy with all of them.
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Pete Moore

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Posted 1 year ago

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Blue Angel, Champion

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Pete, at 4C the battery would last 1/4 = 15 min

Also, because the average battery voltage is 50.4V (3.6V x 14), a 1200W draw would be about 23.8A, or 4.76C, or 12.6 min, based on a 5Ah battery. Not impossible, just not quite as good as your predictions. :-)

An Ego pressure washer has been a HUGE request here for a long time, here's hoping they're listening!

FYI, a 56V Ego version of this 20V Worx unit would be incredible!

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Pete Moore

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Yes!  You're right.  Sorry about that miscalculation...  15min would probably be more of a minimum run time for many pressure washing tasks.  I do really like the Worx concept, but I haven't tried one.  It looks too compact to have any real power, but I could be wrong.
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Erik

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You would still need to unravel the garden hose, and pressure hose, you're still limited by the garden hose length so the electrical cord is kind of moot in a way. I have a 2050psi electric pressure washer and dont see the big deal I guess?


Any pressure washer your going to have to unravel a supply and pressure hose.
(Edited)
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Blue Angel, Champion

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Erik, check out the video:

https://www.youtube.com/watch?v=kfO78OxT2B4

Larger jobs would obviously make a hose more practical than carrying your water to the job, but I think they've done a great job of demonstrating the flexibility of a battery powered unit.

And I absolutely think that for small jobs, filling up a pail of water would be WAY more convenient than getting out a garden hose. ;-)
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Erik

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Blue, I seen that thing last month and although the concept is cool I laughed. It didn't look any better then my garden hose nozzel with a jet setting! I was going to try out a worx line trimmer I ordered, but returned it because I got a better deal on a 24v Craftsman.

I dunno for me anyways I don't even notice my pressure washers 35ft power cord, with 50ft heavy duty extension if I need to go further, along with 100ft rubber hose.
(Edited)
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Blue Angel, Champion

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I agree, the 20V Worx unit is probably little more than a toy.  It would still come in handy, but I wouldn't have high hopes for getting any serious work done with it.

That's where Ego's 56V battery comes in, the smallest of which has 3.5X as much energy storage, the larger ones 7X and 10.5X.  With that kind of battery to draw from the tool could easily go from novelty item to something far more useful.

To do an honest job of matching a plug-in pressure washer's performance, I think we'd be looking at a much larger unit with a dual battery setup similar to the snowblower.
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David Cline, Champion

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Just spent half an hour and $10 resuscitating my gas powered pressure washer for a 5-minute job. Now it will go back in the garage to sit until I have to jump through all the hoops again for the next little job in a few months.

Gas power is simply not practical for a tool used so infrequently. Maybe if you pressure wash your cars every week. The last two Karcher plug-in electric pressure washers I had were such a chore to daisy chain extension cords that I never used on the sidewalks, and rarely used for anything. Both died about 1 month past the 1 year warranty.

HUGE gap in the marketplace just begging to be filled with an Ego unit. I am curious if there is more demand for a basic hose attachment like was posted above (which I definitely need to check out!) or a rolling tank-based version like sun-joe makes. Or perhaps both, with a tank sold as an profit-driving accessory...
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Jacob, Champion

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Hp = (psi x gpm) /(1714xpump efficiency)

2400x2 = 4800

80% eff so 1714x.8 = 1371.2

4800/ 1371.2 = 3.5 hp req

3.5 x 768 = 2.61 kw

2.61kw/56 = 46.6 amps


Multiply that by ego motor efficiency along with controller efficiency..


Easily 50 to 55 amps in the end.
(Edited)
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TheAtomTwister

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2610W/50.4V=51.8A  3.5 horsepower * 745.7 watts per horsepower (1hp=745.7W, not 768) = 2609.95W (or 2.61kW (as you indicated, replace 768 with 745.7).
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Oh ya..... Good catch buddy. Thanks
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Pete Moore

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To help mitigate the limited energy stored in the battery, the unit could have a dial to set the output pressure.  Most of the time, I probably only need 1000-1500 psi for quick jobs such as washing the car, cleaning the porch, etc.  For example - my greenworks plug-in pressure washer is 1600 psi and 1.2 gpm.  Using the above equation, the power requirement would be 1,075w, or about 19 amps on the ~56v battery.  About 20 minutes on the 7.5Ah battery.

There could be a turbo button like the leaf blower that kicks it up to 2400psi only when needed.
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Jacob, Champion

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Definately requires peak power (2 batteries like the snow blower) maybe something like this

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Jacob, Champion

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I really hope they make one. I would love a pressure washer
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Blue Angel, Champion

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Works great, just don't cross the streams... :-)
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Kite Army

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I just got my hands on the WORX Hydroshot - check out the video.


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Michael Mcdermott

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This reply was created from a merged topic originally titled Ego Power Washer.

I have a full arsenal of EGO power tools (power-driven mower, hedger, trimmer, blower and chainsaw) and couldn't be happier with the power, performance and longevity!    

All I need now is a power washer.   My electric power washer recently broke down - it was a pain to work with anyways (power cord, GFI receptacles, etc.).    I don't want a gas one because I'm now spoiled by not having to deal with the gas, oil, priming, pulling . . . and cursing (when it won't start)!   

An EGO power washer wold be the perfect solution - chord freedom, no fuel/oil/mess and plenty of power (based on other EGO tools).

Please let me know if this tool is on the EGO horizon.

Thanks!
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TheAtomTwister

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For cleaning concrete, one alternative would be a spinning brush, I do not mean spinning disc like the hurricane brush (as seen on TV), I mean spinning in a rolling fashion, the axis of rotation would be parallel to the horizon and perpendicular to one's line of vision as he holds it out in front of him.  A cordless stiff-bristled spinning brush, 8 incher or 12 incher.  If one were to let it roll, it would roll toward them so they can lean into it as they push it against the concrete and really get it to scrub all the junk off of it.  Different levels of stiffness can be used for different surfaces that need cleaning.  I came up with this idea because I found this like 8 inch very thick bristled broom-like brush and I started scrubbing the concrete back and forth and it got a bunch of the hardened dried-out algae from the concrete.  A cordless one of those that spins with high torque in a rolling motion could be used to clean crap off of just about anything.  Also one that spins like a weed wacker would also be very handy, one with interchangeable heads, different shaped heads, different bristle thickness, etc.. One basically like the hurricane cleaner but far more powerful and of course 56V Arc Lithium.
(Edited)
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Jacob, Champion

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So a brush on the snowblower. Convert the auger to a brush but wrong direction. So switch 2 wires on the motor as it does not have a hall sensor on it.
Oh and to rub in what I got on ebay for 150.00
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TheAtomTwister

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There you go.  Hey Ma, Here's your new carpet cleaner!

I am actually really interested in what that would actually do.  On the other hand, I was thinking of something you could really lean into so it would scrub hard, something on one stick.  It would analog to what you're describing as the Greenworks 12 inch snow shovel analogs to the EGO 21in snowblower. This small heavy duty spinning brush would clean concrete as well as any pressure washer would in theory.  It and the big one that you;re describing would be highly versatile, and the big one would only need maybe 900W, and the little one around 450W to 500W.  Those figures aren't really that well calculated, they are just guesses.  It would be nice for the brushes to have high speed and high torque options.  The smaller ones could even clean walls with the right attachments.

One more thing,  this brush will need to have a way of delivering water to the brush and the surface that it brushes should water be needed as it would be if you're going to use it to clean algae off of concrete, so a place to hook on a hose would be ideal, and of course the tool, at least the base of it, would need to be waterproofed.  A cotton attachment or some kind of cloth for cleaning cars would be good.  A steel bristle attachment would be good for cleaning the barbecue, having it be extendable, like it being made up of pole segments or it being a telescoping system would allow it to reach high places or be very short as would be ideal for cleaning the BBQ and various other things.  I can't even begin to imagine just how versatile a tool like this would really be.
(Edited)
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Jacob, Champion

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Well I have 6000 watts of power sitting in my shop now.
One battery bay will be a backpack battery system. Peak power of course. One will be for the Post hole digger.

And the last for my twin screw pressure washer. No vibration at all. All part of the gun in your hand. Either that or like the ghost busters backpack.
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Blue Angel, Champion

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Wow, you got problems but power ain't one!
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Jacob, Champion

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Hey. I want more tools. I do what I gots ta do
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TheAtomTwister

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As for my response to you, Pete, what exactly did you want to do with the pressure washer, I ask this because I'm wondering if you could do it with this kind of electric brushing tool that I'm describing.

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