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Thread: Electricity consumption - Izzo alex Duetto running 100% of the time.

  1. #1
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    Lightbulb Electricity consumption - Izzo alex Duetto running 100% of the time.

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I put a power meter on my Izzo to measure the power consumption and cost to run it. So far, 2 days: first 24 hours on 100% and second 100% but with my "sock" over the E61;
    For the test period (being in Melbourne) our kitchen area has gone from 10C overnight to around 20C during the day -say average 14C. Yep pretty cold.

    During the 48 hours i think we made about 15-20 coffees between us.

    The sock made less than 0.1kWHr difference for the 24 hours so i guess it's not worth the trouble.

    Consumption, 24 Hrs running, 4.5 KWhr which at my electricity price [27.3c/kWhr all incl. ] is $1.25 per day or $8.75 per week, $470 p.a. Most likely less over a full year as the temp would be warmer -hopefully.

    I will now make measurements now over 1 week for usual scenario of turning the machine off during the day and overnight, but this is a handy baseline figure and doesn't sound much per day but sure adds up over a year!

  2. #2
    Member thundering_gerkins's Avatar
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    I'm not suprised by the electricity consumption, the amount of heat that's lost through the cup warming area is amazing.
    I think the extra cost of running this beastie over my silvia is well worth it.
    How can you put a price on a smile that Alex delivers every morning. (Convincing my other half who pays the bills).
    I'm not sure on the conversion rates, but getting a smile at 5.00 in the morning has got to be worth twice as much as an afternoon smile

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    Thanks for the analysis/post, I've always wondered what my Alex costs to run. Truth be told, no matter how much it costs my family couldn't live without it! That's including my 22mth old daughter who likes her babycino every morning ("cokkee" as she calls it!!)

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    Quote Originally Posted by dwhitfie View Post
    Thanks for the analysis/post, I've always wondered what my Alex costs to run.
    +1 - interesting to know. I've just got my Duetto and am loving it (although had a bit of a battle with the milk). Similar temps in my kitchen, so thanks for the data.

    Pete

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    Great post mate! You beat me to it.

    I have a Bezzera BZ35e and I have purchased an electricity meter on eBay and I was going to do a before and after study.

    Before will be normal. After will be with an insulated boiler.

    I'm extremely interested to know the difference in price and not only that but to relieve the machine of so many on/off heat cycles. Atleast I now have something to compare it to!

    -Brendon

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    Hi brettchris- one thing to keep in mind is that you can cut that by at least haf by switching the steam boiler off. Leaving the machine off overnight would cut your requirement by a further third.

    You're then talking <50c per day if you use your machine every day of the year.

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    I'm finding the ability to switch off the steam boiler really useful. BTW, does anyone know how long it typically takes for the group to come up to temp? It seems pretty quick, but I don't have the instrumentation to measure it.

    Pete

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    Senior Member timmyc's Avatar
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    I feel that my coffee tastes different when pulling a shot while the steam boiler is off. Perhaps due to cold water entering the brew boiler? Or just a placebo :P?

    Tim

    Quote Originally Posted by Talk_Coffee View Post
    Hi brettchris- one thing to keep in mind is that you can cut that by at least haf by switching the steam boiler off. Leaving the machine off overnight would cut your requirement by a further third.

    You're then talking <50c per day if you use your machine every day of the year.

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    Quote Originally Posted by Pete39 View Post
    I'm finding the ability to switch off the steam boiler really useful. BTW, does anyone know how long it typically takes for the group to come up to temp? It seems pretty quick, but I don't have the instrumentation to measure it.

    Pete
    Hi Pete,

    Our trusty Scace II tells us circa 10 minutes.

    Quote Originally Posted by timmyc View Post
    I feel that my coffee tastes different when pulling a shot while the steam boiler is off. Perhaps due to cold water entering the brew boiler? Or just a placebo :P?

    Tim
    G'day Timmy. My instinct tells me mainly placebo, but I will run some scace tests when I have time. One of my fave shot machines is the Diadema Perfetta and it's a single boiler of the same capacity. I have not noticed a difference.

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    Quote Originally Posted by Talk_Coffee View Post
    Hi Pete,

    Our trusty Scace II tells us circa 10 minutes.
    Thanks Chris.

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    Quote Originally Posted by Talk_Coffee View Post
    Hi Pete,

    Our trusty Scace II tells us circa 10 minutes.
    .
    Do you really mean the Alex D is ready to pull its best shots , 10 mins after switching on from stone cold !
    ..Thats impressive !
    How does it manage to heat up the group to a stable temp so much quicker than an HX machine ?

  12. #12
    Senior Member timmyc's Avatar
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    I very much doubt that's what Chris meant. There is still a lot of metal to heat! Perhaps he meant the steam boiler up to temp after switching it on.

    Quote Originally Posted by blend52 View Post
    Do you really mean the Alex D is ready to pull its best shots , 10 mins after switching on from stone cold !
    ..Thats impressive !
    How does it manage to heat up the group to a stable temp so much quicker than an HX machine ?

  13. #13
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    Actually- it's pretty damn close after 10 minutes.

    52- read up about heat rates of groups without thermosyphon restrictors.

    Would I always use it at 10 min? Nope- but the group is too hot to maintain contact with after 8 min so an emergency shot is very much doable.

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    Ahh, OK !
    I know my Isomac (E61,with no restrictors) takes a good 20-25 mins to get the group up to a stable temp ( measured), even though the boiler is up to temp (1.1 bar) in less than 10 mins.
    But what does the Scace read after 10 mins ??
    As someone else mentioned, a T towel over the group will noticeably reduce the warm up time!

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    I always leave the steam boiler on because we have almost exclusively milk drinks. And I find it a pain if I've turned on the brew boiler and forgot to turn on the steam.

    I allow 15 minutes for before making a coffee from cold: so if the brew is taking 10 minutes the steam boiler is around 4 minutes.

    At 15 minutes both boilers are pretty stable. ( ive also set my steam boiler at 128 - I like a strong steam output which this helps with)

    Might have to redo my tests for 1 week "normal" operation- lost my initial date/time/kWhr notes

    Quote Originally Posted by Pete39 View Post
    I'm finding the ability to switch off the steam boiler really useful. BTW, does anyone know how long it typically takes for the group to come up to temp? It seems pretty quick, but I don't have the instrumentation to measure it.

    Pete

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    Great info and saves me getting a meter and doing a similar test. I for one certainly turn off the steam boiler overnight and only leave the brew boiler on over night if I have an early start. Then I turn the steam boiler on before my shower and its ready to go by the time I get out and dressed. (Worse case scanrio) >$10 a week in electricity is nothing in my household with 4 kids and a commercial 2 door fridge running full-time. I worked out the money I save by buying milk and other products in bulk and storing them in the 'big' fridge, far exceeds the money spent on electricity. Savings consist mainly of not having to drive to the shops every day to get more milk, yoghurt, etc....Once a week shop and we are done. Dont even start me on the coin I am saving from home roasted beans and avoiding take-away coffees.......Being a snob is fun-bloody-tastic!!

    x 2 on the Diadema Perfetta too Chris, as far as quality of single boiler shots......mwah!!!!

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    Bit off topic (perhaps better over on the Duetto thread) but, I haven't noticed any difference in taste with shots pulled at 15, 20 and 30 mins. If I can be up and running in 15 -20 mins, I'm a happy camper!

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    Great topic guys! I actually fire up my duetto via electronic timer, which is set for weekdays at 6am - 715am (off peak power before 7am @ 11cents), weekends 7 - 9 am and 11.30 - 1.30pm ( all off peak @ 11cents). Cost, I don't care as it brightens up my morning everyday - GOLD.

    Chris, would love you opinion on running the boiler at 128 versus 123.

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    Senior Member brettreaby's Avatar
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    Behmor Brazen - $249 - Free Freight
    Well i have now run the test over a week with normal turning on and off as we need the machine. The boiler was always on in this test. The results are that we averaged 1.37kwhr/day ( $ 0.38 ), or 9.6kwhr/week ( $ 2.62) or 500kwhr p.a. ( $136 p.a.)

    Only using the machine as we need it uses 30% of the power compared to leaving it on 24/7. The usage pattern is on at 7 am until maybe 10am, then on again in the afternoon for my sons coffee, then again in the evening for my decaf. Often it got left on during the whole day- along with the lights in his bedroom of course!

    And I can happily live with $136 p.a. for great coffeee whenever i need it!

    BTW original post as brettchris my "other" identity- I must have got confused with the new website.



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