Power Consumption and Smart Plugs

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Picked myself up a cheap Wifi Smart Plug

I figured that if Octoprint can monitor the printer remotely…..if I see on video anything spontaneously combusting, I can remotely cut the power too!

I’ll figure out some scripting at some point to allow temperature sensors / smoke sensors to trigger the plug, but for now, it’s just a bit of fun…

For those wanting to know more about these types of plugs, this one on Amazon just happens to be an ESP8266EX with a relay………just like those cheapy sonoff thingies (of which I have two!)

And someone’s already torn one down and documented it – for which I’m grateful as there’s another rabbit hole I don’t have to follow (for now)

Some useless information about power consumption measured with this plug

 

  • 9.5 to 16.6 Watts when Idle – probably a bit more / less when fans kick in?, lets call it 10 Watts
  • 58 Watts when heating the Extruder
  • 247 Watts when heating the Bed(Blimey!)
  • 291 Watts PEAK and settles at 281 whilst pre heating for PLA
  • 13.9 watts when driving X left and right
  • 17.8  Watts when driving just Y / Bed
  • 13.4 Watts when driving Z up and down – which is a suprise really as I’d have thought it would be double X due to two motors
  • 261.4 Watts when Printing – (205 degrees PLA and 60 Bed)
  • alternates from 261.4 to 43 watts whilst printing

So, Overall, it’s not too power hungry…Lets call it 300 watts peak.

Electricity is about 35p per KWh here…..

if you have a 10 hour print, using 300 watts (peak), that’ll cost you about 33p in electricity! in practice, it’ll actually be a bit less as the heating elements aren’t on all the time, they cycle on/off to maintain the temperature!

Summary, run the printer as much as you want!, it’s less than 4P an hour here in the UK!

 

Author: Bleugh

Early Fourties, Wife, two kids in primary school. Both of us work full time...5 years now we’ve been Back in Blighty after a decade away...It's a new country for everyone! Still finding time to tinker!

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