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k1w1k1d
1243 posts

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  #2141687 8-Dec-2018 17:20
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Two people, 140m 1950's brick and tile, ceiling insulation, log burner, electric HWC. Genesis Day/Night low user.

 

 

 

 


 
 
 

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danfaulknor
877 posts

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Prodigi

  #2141695 8-Dec-2018 17:48
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1400 in Summer, 2000+ in winter. 2 of us, heavy use of heat pumps for heating and cooling. 1kw of server/network gear on 24/7. 

 

Oh, and Gas hot water. We go through a 45kg cylinder every 2.5 months or so

 

And I work from home.

 

 

 

Edit: Added more info.





they/them

 

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blakamin
4431 posts

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  #2141701 8-Dec-2018 18:05
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Holy Carp Batman!!!

 

 

 

I thought our 1725 for 3 months was OTT!! 

 

We use 20kw a day, but EVERYTHING is electric. Including our water pumps and septic pumps and aerator.

 

And our 5kw solar exported 1318.

 

 

 

 

 

165m2 house (1944 stone cottage and 1998 extension) 2 people away 6.30-4.30 weekdays, 




chimera

448 posts

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  #2141964 9-Dec-2018 11:55
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Interesting variance in usage - obviously varies depending on numerous factors, like number of people, size of house etc, but some big differences in usage where people have similar houses and occupants.  Depends as well I guess on such things as different peoples "comfort" levels, eg: whether a heat pump runs 24x7 or not!  I think in my case going Solar to pay half my power bill is worthwhile, as it will run the pool heating and return pump, spa filter and heater, water heating and... as my wife tends to use the dryer throughout the day without thinking twice about it  help there as well.

 

A couple people messaged me about logging power to OpenHAB.  As mentioned, it's pretty accurate (in fact, spot on if I compare the graphs under my account on Contact website)  Here's some images of the circuit board for those asking, fairly simple, a small PCB with hole drilled in center for LDR to point through.  LDR with 10K resistor, wired to A0 port on Wemos D1 mini. I ran a "worm" of blue tack around the bottom outside edge of the PCB and stuck it to the Power meter with the LDR directly over the LED that flashes.

 

Arduino code is HERE if anyone is interested, simply sends using MQTT commands.  You will also need a rules file as this resets daily and monthly counters and also confirms back to the Wemos that it's received and incremented the power usage count.  Rules file is HERE , Items file HERE and Sitemap HERE

 

 

 

 

 





 

 


davidcole
5839 posts

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  #2141990 9-Dec-2018 13:18
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So on your pcb, you go negative to resistor, to ldr, then to gnd on wemos. Positive goes to 3.3v on wemos, then where does your data pin get to the ldr?

Oh and you used a0, I’d found examples where they used a digital pin.




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chimera

448 posts

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  #2142103 9-Dec-2018 16:13
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One side of LDR to Vcc
Other side of LDR to resistor and also to A0
Other side of resistor to GND

LDR is analog, light varies between 0-1024.




 

 


blackjack17
1641 posts

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  #2142140 9-Dec-2018 17:00
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We are currently using around 14.7 kWh per day based on our last few days usage.  3 adults, 2 children under 5 all electric house with a wood burner for winter.  1 adult and 1 child is home all the time.  2 adults and 2 children home 3 days a week and we are all home in the weekends (although the au pair goes away some weekends).

 

110 sqm house 1950s but has had insulation added.  Off the living room is a large glass conservatory which is a massive heat sink in winter.

 

In winter our usage peaks at 22.9 kWh per day (prewood burner it was 33.5 kWh).  While summer it goes down to 11.3 kWh per day.

 

 

 

 

You can see in the graph that we got the wood burner late winter 2016.

 

 

 

 







Mantis
89 posts

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  #2142599 10-Dec-2018 15:12
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One person, 90sqm early 1900's villa with floor/ceiling insulation. Electric hot water, heating via heat pump during the weeknights, woodburner on the weekend.
Additionally, an ever increasing amount of server/network gear (~300 W currently), and a beer fridge.

 

I'm with Electric Kiwi so my actual charge is less, averaging about 20% hour of power savings.

 


Wheelbarrow01
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  #2142855 11-Dec-2018 00:25
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120m2 house built in the 1960's (in Christchurch) with double glazing, foil underfloor, ceiling batts and Insulmax retrofit wall insulation. Occupied by two people who work 9-5. No gas appliances.

 

ULEB wood burner is used for vast majority of heating, heat pump only used for short bursts in the mornings (during free hour of power). Have a modern spa pool which heats whenever it feels like it. And long showers (circa 15-20 mins) are my vice - it's the only way I can wake up...

 

Currently with Electric Kiwi on a low user plan.

 

Last bill was for 352KwH used over 14 days (34KwH of that was free "hour of power" usage) - Total of $93.86 for the fortnight.

 

That would work out at around 9152KwH a year. However our power bill/usage actually goes down in winter as we turn the spa off for most of the colder months and rely on the log burner for heating (firewood is normally around $200 for the year).

 

Thinking of switching to a different Electric Kiwi plan which will save us around $220/year based on current usage -it's their new Stay Ahead plan where for every $200 paid in advance, you get an additional $20 credit (and still get the free daily hour of power).


tdgeek
28931 posts

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  #2142857 11-Dec-2018 00:31
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Wheelbarrow01:

 

120m2 house built in the 1960's (in Christchurch) with double glazing, foil underfloor, ceiling batts and Insulmax retrofit wall insulation. Occupied by two people who work 9-5. No gas appliances.

 

ULEB wood burner is used for vast majority of heating, heat pump only used for short bursts in the mornings (during free hour of power). Have a modern spa pool which heats whenever it feels like it. And long showers (circa 15-20 mins) are my vice - it's the only way I can wake up...

 

Currently with Electric Kiwi on a low user plan.

 

Last bill was for 352KwH used over 14 days (34KwH of that was free "hour of power" usage) - Total of $93.86 for the fortnight.

 

That would work out at around 9152KwH a year. However our power bill/usage actually goes down in winter as we turn the spa off for most of the colder months and rely on the log burner for heating (firewood is normally around $200 for the year).

 

Thinking of switching to a different Electric Kiwi plan which will save us around $220/year based on current usage -it's their new Stay Ahead plan where for every $200 paid in advance, you get an additional $20 credit (and still get the free daily hour of power).

 

 

Hey Simon

 

I took that EK plan a couple of weeks ago, also Low User ChCh. My rate is .2608 or similar, free hour,  and the 10% "discount" so a pretty good deal if you can maximise that free hour, as that was effectively the discount replacement. 26c per kWh is not bad when you get two discounts.  


tdgeek
28931 posts

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  #2142860 11-Dec-2018 00:55
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ChCh 283sqm, gas cooking, solar HW, two adults at home during the day (me and wife's Mum who moved in to supervise me :-)  )

 

276kWh for 14 days $67

 

Most cooking is gas, thats also cheap, a $100 bottle lasts for months.

 

Plasma on for a lot of the day (now), another on at night. Occasionally with bad weather I top up the hot water manually, but thats not often and brief. Just had a digital timer installed today for the bottom element to boost that for the free hour (the top element is only on in the free hour 9pm to 10pm) so that will stop the odd topup, and help in winter. Dishwasher and laundry are on in the free hour, laundry occasionally outside of it. 

 

Winter wise it maxed at $129 per F/N, easing back to 90 from late July, to $50 F/N Sept, then from Oct when wife and Mum got back home to the current level of $67 ish per F/N The winter variable is 1 or 2 heatpumps. one on during the day, and two bathroom tile floors on for 2 hours early morning and at night, one of those hours is free


heapsort
235 posts

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  #2142869 11-Dec-2018 06:32
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Family of two adults and two teenagers here. Taking a year as "start of Feb to end of Jan" is most applicable for us, due to two recent milestones almost exactly a year apart: last switched electricity retailer (to Flick) at start of February 2017; bought a PHEV (which charges overnight on a timer) early Feb 2018.

 

Year of Feb 2017 to Jan 2018: weekly usage 85 to 195 kWh, total 6700 kWh.

 

Year of Feb 2018 to Jan 2019: weekly usage 130 to 235 kWh, projected total 9500 kWh - an average weekly increase of 55 kWh since buying the PHEV. Most of that increase is due to the PHEV charging, but I suspect a little of it is the teenagers taking longer showers...

 

Of course, that increase in electricity use came with a drop in fossil fuel use. I doubt the PHEV purchase stacks up economically, but I'm pleased with the emission savings. Our annual expense budget shows petrol spending will be around 10-15% of what we spent the previous year. Just rolled over 10,000 km last week and 85 litres of petrol used.


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