The main difference between Karcher WV 1 Plus, WV 6 Plus and WV 6 Premium is as follows:
Karcher WV 6 Plus vs WV 6 Premium
The WV 6 Premium are almost the same as WV 6 Plus, but comes in a Premium white color, and includes some extra accessories: a narrow suction nozzle which is 6.7-inch in width for cleaning small panes, a microfiber wiping cloth for outdoor use and a Dirt Scraper for removing
heavy soiling such as dried bird droppings.
Karcher WV 1 Plus vs WV 6 Plus/Premium
- The WV 6 Plus/Premium have wider improved blade which is more flexible, clean closer to edges and floor, and help you clean faster.
- The run time on WV 6 Plus/Premium is much longer, they run up to 100 minutes versus 25 minutes on the WV 1 Plus. Longer run time allows you to clean larger areas without interrupting.
- The WV 6 Plus/Premium have more intuitive LED display which can indicate the remaining minutes of battery running time, the one on WV1 Plus does not show this data.
- The squeegee blade and the suction nozzle on the WV 6 Plus/Premium are easier to be removed for cleaning after each use.
- The WV 6 Plus/Premium come with a fast charger whereas the WV 1 Plus uses a standard charger.
- The WV 6 Plus/Premium have a larger waste water tank which holds 150ml versus 100ml on the WV1 Plus.
- The Premium is in white color whereas the Plus is yellow.
Read comparison table below for more info:
| Vacuum | Karcher Window Vacuum WV 1 Plus | Karcher Window Vacuum WV 6 Plus | Karcher Window Vacuum WV 6 Premium |
| Model | WV 1 Plus | WV 6 Plus | WV 6 Premium |
| Type | Window Vacuum | Window Vacuum | Window Vacuum |
| Power Source | Battery Powered | Battery Powered | Battery Powered |
| Detachable Battery for Charging | No | No | No |
| Battery Type | Lithium ion battery | Lithium ion battery | Lithium ion battery |
| Nominal voltage of battery | 3.65V | 3.65V | 3.65V |
| Charging Time | 150 minutes | 170 minutes | 170 minutes |
| Running Time | 25 minutes | 100 minutes | 100 minutes |
| Battery Indicator | Yes | Yes | Yes |
| Cleaning performance per battery charge | Approx. 590 ft² | Approx. 3225 ft² | Approx. 3225 ft² |
| Charger | Included | Quick Charger | Quick Charger |
| Power Supply | 120V / 60Hz | 100-240V / 50 - 60Hz | 100-240V / 50 - 60Hz |
| Nominal voltage of charger | 5.5V | 5.5V | 5.5V |
| Nominal current of charger | 600ml | 2000ml | 2000ml |
| Spray Bottle | Spray bottle Standard with microfibre wiping cloth | Spray bottle Extra with microfibre wiping cloth | Spray bottle Extra with microfibre wiping cloth |
| Window cleaner concentrate | 1 x 500 ml | 1 x 500 ml | 1 x 500 ml |
| Waste water tank volume | 100ml | 150ml | 150ml |
| Color | Yellow | Yellow | White |
| Weight without accessories | 1.1 lbs | 1.7 lbs | 1.7 lbs |
| Dimensions (L x W x H) | 5.1" x 9.8" x 10.8" | 5" x 11" x 12.2" | 5" x 11" x 12.2" |
| Other | includes a narrow suction nozzle (6.7-inch) for cleaning small panes, a microfiber cloth for outdoor use and a Dirt scraper for removing heavy soiling such as dried bird droppings. |
Some similarities:
They all have built in battery which is not removable for recharging. You can not use a second battery to extend the working time.
Have On/Off button.
Have only one vacuum speed.
For more details, you can download manuals from Karcher official website, here are the links if you are lazy to find the links on their website.
Karcher WV 1 Plus Manual
https://s1.kaercher-media.com/documents/manuals/raw/000/BTA-5676200-000-01.pdf
Karcher WV 6 Plus Manual
https://s1.kaercher-media.com/documents/manuals/raw/000/BTA-5765066-000-01.pdf
Karcher WV 6 Premium Manual
https://s1.kaercher-media.com/documents/manuals/raw/000/BTA-5765068-000-01.pdf