Author Topic: Portable vacuum?  (Read 3185 times)

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Offline camprr

  • Posts: 1
Portable vacuum?
« on: April 14, 2016, 04:11 PM »
I have just bought my first Festool product, a SYS CTL vacuum cleaner.

The wife and I are re-building our boat and sanding lot's of fibreglass. Festool's 'zero dust' really caught our eye, and so far it's done extremely well reducing our dust production (we still wear breathing masks, eye protection and overalls to make sure).

We use the vacuum cleaner around the boat too, because it is useful to just sling it around your shoulder and only have the power cable trailing.

Which got me thinking, would it not be cool if you could vacuum for ~ 30min on batteries, or do some work for about 15min with power tools and vacuum (cutting wood, sanding a small surface, etc etc).

Vacuum cleaner consumption (spec) is ~1000W, so around 500Wh would be needed to supply the vacuum cleaner with 30 minutes of power. I realised I needed some serious batteries to supply that kind of power, and to make it portable too. Ideally, I would fit batteries and an inverter into a SYS 1 TL box, so I can attach it to the SYS CTL vacuum cleaner.

I have a quad-copter, and I know the batteries for these are:
  • Light
  • Able to supply a high current
  • Relatively compact
  • Li-ion based technology
So a large quad-copter battery? Has to be a _very_ large one.

Found just the thing. At 20Ah and ~14.8V it houses ~300Wh of power, so 2 should do the trick.
They weigh just 1.6Kg each, giving a total weight of 2.3kg for the batteries.

The systainer is 396 x 296 x 105 mm outside and 383 x 273 x 75 mm inside measurements, which gives a volume of ~7.8 Litres
The batteries are 200 x 90 x 40mm each, or around 1.44 litres total. That gives ~ 6.4 Litres to fit a 2000/4000W true sine wave inverter. I will leave the charger external to reduce weight and complexity.
The 4000W(max) true sine wave inverter will pull around 270Amps at 14.8V, requiring some hefty wiring, adding to the weight. It is important to keep wiring short.
The batteries will have no problems, as they are 10C rated (giving around 200A of current each).
There are several inverters on Ebay and other channels that can supply 2000/4000W (2000W continuous and 4000W peak power) at OK prices.
I estimate the whole 'product' would cost ~ 500 Euros, ~ 200 Euros for the batteries and ~ 300 Euros for the inverter.

Batteries: http://www.hobbyking.com/hobbyking/store/__80905__Multistar_High_Capacity_4S_20000mAh_Multi_Rotor_Lipo_Pack_EU_Warehouse_.html
Inverter (example): http://r.ebay.com/z15oen (volume ~ 8.25 litres, weight 5.73 kilos!). On could remove the packaging to get a more efficient volume and still maintain the systainer-1 size.

The product would weigh ~ 7kg, and be able to power the SYS CTL for ~30minutes, and a total of 2000W for around 15 minutes.

For now it's just a mind-fart, but it would be interesting to find out if it's feasible.

Offline rst

  • Posts: 2806
Re: Portable vacuum?
« Reply #1 on: April 14, 2016, 05:06 PM »
I have a Milwaukee M18V cordless vac/blower that works great, I've even hooked my Festoys to it on occasion.

Offline luke duke

  • Posts: 40
Re: Portable vacuum?
« Reply #2 on: April 14, 2016, 05:07 PM »
Dewalt makes a cordless shop vac. I have one and it works well.

Offline sae

  • Posts: 847
Re: Portable vacuum?
« Reply #3 on: April 14, 2016, 06:52 PM »
Makita makes both a backpack HEPA vac, and a portable cordless/corded HEPA dust extractor that run on dual 18v batteries.

http://www.coptool.com/makita-18v-cordless-brushless-2016-preview/