Karcher Rechargeable Window Vacuum FAQ’s

Little did we know when we published our review that it would provoke such a positive response and quite so many questions. In an attempt to answer some of those questions we have created this list of FAQ’s and answers from the most frequently asked questions we have received.

What detergent can I use with the Karcher window cleaner?
Simply use any detergent you wish. Karcher of course supply their own and suggest that you use theirs, however there is actually no reason to restrict yourself to that particular detergent. Your own choice is fine as long as it is liquid.

What else can I clean with the Karcher window vac?
It is perfect for shower cubicles, tiled surfaces of any kind and any kind of sealed surface like laminated tables.

How long does the Karcher rechargeable window vac take to charge?
Karcher state a 2 hour recharge time for the WV50 and our review findings tend to support that result, reviews from around the web also seem to suggest that this time is accurate.

How do I empty the Karcher window vac?
Emptying the vac is simplicity itself, just remove the small rubber bung in the tank and pour it straight down the drain. You can see it working in this video.

How does the Karcher window vac work?
It is essentially a hand held vacuum designed for fluid rather than dust, the thing that makes it work so well is the seal the head gets against the surface of the glass allowing it to dry the window completely with just one pass.

Where can I buy the Karcher window vac?
Take a look at our buying guide for more details but you can find it in just about any high street retailer or on their websites. Just be sure to read our buying guide first.

What is the best price for the Karcher window vac?
Well there is no real definitive answer to that but the best price we have found here in the UK is from
Screwfix Direct at £49.99
. Of course there may be opportunities for cheaper deals at eBay.


Buy From Ebay

Kärcher Window Vac Holster Belt - Current price: £19.77

KARCHER WV5 PREMIUM WINDOW VAC - Current price: £74.99

Window Vac Vacuum Battery Charger Power Supply For Karcher WV50 WV75 Cleaner UK - Current price: £5.59

Window Vac Vacuum Battery Charger Power Supply For Karcher WV50 WV75 Cleaner UK - Current price: £5.59

- Current price: £49.85

Kärcher Window Vac Extension Pole for All Kärcher Window Vac Models - Current price: £45.96

(Product data is refreshed every 10 minutes, approximately.)

Author: DiyPeople

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  1. The Karcher window vac is a one of a kind product that does what is says, you get crystal clear streak free finish on windows and any flat surface, also great for any spillage that you might have, my mother-in-law bought one and she loves it, i borrow hers and find it very easy to use.

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  2. Great review of such a great product. Karcher really hit nail on the head with this release. keep it up DIY People! 🙂

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  3. My karcher window cleaner doesn’t seem to be charging up my cleaner, am I able to purchase a new battery

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  4. I ve had two Karcher window vacs,not happy as after a while the battery won t charge,when I ve enquired what to do the answer is always the same can t get new battery for it.so annoyed

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    • It really does seem to be an easily rectified issue. make the batteries replaceable. However, one thing i would say is that a replacement battery would likely not be cost effective given how cheap these are to buy now. I think the bigger problem is the number of units that seem to fail in a remarkably short period.


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  5. I have just bought the karcher window on wv50 from argos for £34,99 I love it .

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    • Glad to hear it, feel free to keep us up to date and thanks for your input. – H

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  6. Karcher window cleaner great when it works I am on my third always the same problem won’t charge flashing green light bought from Argos they won’t change it asi lost the receipt

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