A modern PC with an ATX power supply will draw around 15-25W switched off unless you turn it off at the plug and if your monitor has a 'standby mode' where it 'switches off' when there's no signal then that will draw about 5W. My Humax Freeview PVR takes about 15W in standby and my router pulls 10W. My stereo draws about 7W in standby as it has a clock, and there are any number of silly little things that also draw a few watts...the power supply for my wireless doorbell, the TV aerial amplifier and the clock on the microwave.
My cordless phone and internet router are powered through a UPS and that takes a watt or two to maintain the battery and keep the monitoring electronics working. It all adds up!
I didn't know the PC consumed when I switched it off. I do also switch the monitor off but not at the mains. I forgot about the landline cradle and tv aerial booster. Maybe my hidden 90w is in plain sight.
I'm an Eon Next dual fuel customer with no particular expertise but have some time on my hands that I am using to try and help out a bit.
Two ATX on standby plus two monitors on standby, plus powered audio all seem in total to be using 7.3 Watts as pictured just now. RMS current of 0.15 Amps implying 36 Watts indicates an attrociously poor power factor; mostly rushing in and out of capacitors I'd expect.
I keep this lot normally off at the wall. If you intend to go around the house looking for bill reductions then the plug in power monitor in the picture is really useful for that.
Last edited by wizzo227; 11-10-23 at 20:10.
Reason: picture shrinking
My brand new A+++ rated BEKO fridge-freezer says 435kWh per annum on the energy rating sticker. That's about 1.2kWh per day, so I would expect pretty much that sort of ballpark figure for a similar appliance.
Don't shoot me, I'm only the piano player. I DON'T work for or on behalf of EON.Next, but am willing to try and help if I can. Not on mains gas, mobile network or mains drainage. House heated almost entirely by baby dragons.
My brand new A+++ rated BEKO fridge-freezer says 435kWh per annum on the energy rating sticker. That's about 1.2kWh per day, so I would expect pretty much that sort of ballpark figure for a similar appliance.
So that's 50w average continuous consumption all year. @Mailman says his FF burns 50w only when the compressor kicks in. Maybe they just have to assume it burns all it can continuously when advising of the annual consumption.
Two ATX on standby plus two monitors on standby, plus powered audio all seem in total to be using 7.3 Watts as pictured just now. RMS current of 0.15 Amps implying 36 Watts indicates an attrociously poor power factor; mostly rushing in and out of capacitors I'd expect.
I keep this lot normally off at the wall. If you intend to go around the house looking for bill reductions then the plug in power monitor in the picture is really useful for that.
So, even so the power monitor shows a consumption of 7.3w you think the actual consumption is 36w? If that's correct then doesn't that defeat the object of the monitor?
@JoeSoap
Actual power consumption I(t)V(t).dt measured was 7.3 Watts.
I on its own was 0.15 Amps rms, but miss-timed against V(t). 0.24kV*0.15 Amps implies 0.036 kW.
There is a textbook electrical engineering explaination which usually calls that discrepancy a "power factor"
One gainful help from a plug-in monitor like this is to get a better view than would the total on the coffee table display with your SMETS2 "smart" meter. With an imperfect waveform like this one going through the same household total meter outside as the slightly lagging waveform from the fridge motor, the Watts won't add up quite right.
I computed the reduction in consumption by replacing my freezer @ 2.1 kWh per day from mid November 2022. The ongoing effect is clear in my earlier graphs.
Appliances that use power give off heat. A through plug RCD device was warm even with nothing plugged in. A while ago eon supplied a device that was mouse controlled which powered 3 devices. when one (the computer) was switched off, then the printer and monitor went off too.
Using the energy monitor I went round all the plugged in devices and measured consumption over several days. I then decided whether they stayed on or not. My conclusion -the little red light on stanby appliances means "possible danger to bank balance"
Current Eon Next customer, ex EDF, Zog and Symbio. Don't think dual fuel saves money and think the smart meter programme is a waste of our money. Chronologically Gifted. If I offend let me know by private message, but I’ll continue to express my opinions nonetheless.
I remember your old freezer used a lot of energy but I couldn't remember how much. What I'm trying to get to the bottom of is does the amount of consumption showing on the power monitor match what you get billed for. As interesting as @wizzo227's answers are, I'm none the wiser.
how accurate is the power monitor? Accurate enough for me. I tended to record for several days to get a better , more reliable , reading. Using an IHD is not too precise for an individual appliance unless you can absolutely be sure of disconnecting everything else.
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