I feel like I'm going crazy trying to figure out the cost to run my air-conditioning!
It's a 5kw system, that is run for 8hrs a day. My electricity costs 32c/kWh.
So, 5 x 8 = 40kwh —->
Times x .32 = $12.80?
I've used other online calculators that work off the newer E.R. figures and I get different figures.
That's insanely expensive isn't it?
Appreciate anyone's help on this.
I would need to check outside, but I do knownthe model is a Mitsubishi srk50zsa-w manufacturered in 2021, using r32. Not sure if that helps?
Input Cooling T1 kW 1.39 (0.27 ~ 1.86)
Heating H1 1.49 (0.26 ~ 1.97)
https://www.airconditioning-online.com.au/product/mitsubishi…
Your AC draws on average 1.39kw, so you can re do your math using that value
Oh wow! I had a way different figure. Aahhh I feel like an idiot - they output more than input (wouldn't be much good if they didnt). Thank you, I'll check out that site! Cheers
they output more than input
EER Cooling T1 3.6
COP Heating H1 3.89
The EER/COP indicates how efficient they are in terms of how many more times they output over their input.
The higher the number, the more efficient.
We have a 2.5kw system with a EER of 4.9 that’s been on all night in dry mode on 23° in Melb and it’s used anywhere from 70w-220w extra per hour than normal household running costs, which equates to 30c extra between midnight and now (9:45am). Data is based off PowerPal - highly recommend getting one or similar (free in VIC)
kW 1.39 (0.27 ~ 1.86)
What does the figure in the brackets represent
@cloudy: It is the operating range min to max.
Cooling t1 - kW capacity 5.0 (1.2 ~ 5.5)
Cooling t1 - kW input 1.39 (0.27 ~ 1.86)
So when its outputting 5kW it is typically using 1.39kW of power. Appears that model can 'overclock' to 5.5kW of output but it would use 1.86kW of power to do so.
Likely would not run 'flat out ' the entire time , ramping up and down between it's min and max power values to maintain your temperature target throughout the day
Ok right, so they dont run flat chat the whole time. On these 30c ish days we run it @ 26/27c and close off the living room + draw curtains- so its fairly insulated, I guess?
As the other comments have explained the absolute maximum it could cost in 8 hours would be $4.762 (1.86kw*8) but that would be if you set it to 16 degrees and let it run. If you are setting it to 26/27 it will be a fraction of that (unless it's a huge room and you couldn't get it much under that if you turned the temperature down)
Thank you OZbargainers! Im not going to have such a melt down when I see the bill! Cheers!!!
Well you should expect a higher bill than usual. Running it 8 hours a day ia considered long to some, it's long to me, I hate running my AC, I do it on hot AF days. If your bill is every 3 months that's like 720 hours of AC running.
That's a small splitty.. My ducted system has around 6kw of input power and costs a bomb while it's working at getting the house to temperature, then starts sitting at around 2-2.5kw to maintain it. It adds about $150 / month to my bill. My peak power is $0.40, shoulder is $0.32, "solar hours" are free, and night-time off-peak is $0.084, and there are demand charges in there as well.
5kw is the output, not the input. Secondly, it doesn't run all the time, and assuming it's an inverter model, doesn't always run at full capacity. You numbers are extremely off.
I feel like I'm going crazy trying to figure out the cost to run my air-conditioning!
Dont…just enjoy being happy and comfortable.
YMMV
I have ducted refrigerated air con running now for whole 30square double storey house.
Outside temp 30, inside temp 24, air con set to 21.
My Powerpal unit says the whole house is using 1.4-1.6kwh on avg per hour.
Solar panels generating 2.74kwh.
Grow some trees and install some outdoor blinds to save on running costs
The maths you do before you buy, or at least before you choose to run for 8 hours a day.
This is the norm these days in Straya. Build a big leaky house,80% glass facing west, black un-insulated roof is a suburb with no trees, and then say 'yay' the builder gave us free aircon. LOL.
We deserve what's coming our way.
(enter "It's all the Boomers fault")
Unfortunately I'm renting atm. Got the deposit ready.
Yeah, i agree! Its insane to me that everyone builds with black roof! You want as much of that energy bouncing off. This is what the old steel roofs did.
Build a solar passive house FFS. It isn't complex or expensive to do the main things upfront.You can worry about fine tuning later. Read the (easy to digest) book, Warm House Cool House, I think the CSIRO was involved in it.
Avoid builders who aren't supportive of SP. They just want to build off a shit /quick design plan.
Mm hm, now calmer. Bahaha 😃 I see what you're saying.
Is 5kw the output or input energy? A 5kw input system would be for a ducted system and quite big.
Also, your AC probably won't run for the entire time, so you would need to take that into account