If you want to turn some of the Naim kit off whilst not using it then it should be the 250s as these warm up quickly (20 minutes). They use more than the Supercap too.
370w usage here with nothing on but fridges, freezers and Naim 272/XPS/250.
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How much is 370 W per year if itās on 24/7?
I have twice as many Naim boxes plugged in as you do.
It uses 0.37kw, so if your tariff is 28.36p per kWh, it costs 10.5p per hour. Thatās Ā£920 per year. Iām sure you can do the maths if your hourly rate is different - Iām using the Loyal Octopus 12M fix price.
Makes sense.
I donāt think my Naim boxes (and fridges) can have the same rate per box as otherwise my leccy bill would be larger than it is.
@Guinnless - were you playing music on your system during that test, or not? Would the wattage vary much between being on with and without playing music?
Iām now on the Octopus variable rate tariff:
Tariff info (all prices include VAT)
Reference VAR-22-11-01
Starts from 12:00 AM, 25th Aug 2023
Electricity
Unit price 29.94p per kWh
Standing charge 49.77p per day
Gas
Unit price 7.51p per kWh
Standing charge 27.47p per day
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Nothing playing. The 370w value will vary slightly if one of the fridges or freezers cycles.
There are network switches, CCTV as well that Iād forgotten about. Plus various items on standby 
Okay with those other items added in it makes more sense.
370 W is approximately the ābasal metabolic rateā of your house.
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I didnāt find much difference with the NAP250s with music playing or not, a couple of watts higher but nothing massive. Same with the Nova though Iām not currently powering speakers with it.
Fridges/freezers tend to consume quite a lot of energy.
Iād like to replace a chest freezer with an uptight one with drawers at some stage as we tend to graze the top items and never reach the bottom!
I read that keeping freezers quite full is beneficial as when theyāre fairly empty a lot more room air gets in when opened which has to be chilled, though Iām not entirely convinced cooling air takes as much energy as keeping stuff which is already frozen at the same temperature. This also made me wonder as so many supermarkets have freezer units without doors/lids as well as ones with doors. Are the āopenā ones maybe high churn items which would have door opening/closing all the time and many air changes as a result?
Yes, I thought it wouldnāt make much difference, but just wanted to check.
That is a very high value. It cannot be the naim, that counts for maybe 50watt. A fridge uses about 1 kw per day during spring/ summer.
Do you have an old tv? Do you have an old computer always on?
As per my later post there are other items too that I sort of overlooked 
To make it clearer we have a fridge/freezer, a fridge and a freezer.
Two CCTV cameras and recorder.
Two Cisco switches and two Netgear ones.
Four Aircon units on standby.
LG 55 OLED.
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Well then I trust you can certainly pay the energy bills 
Iāve just ordered my first Cisco switch, I payed extra attention to the power consumption.
Which Cisco did you get, and what is the consumption?
Was the TV on standby (which must take a lot less power than when itās on)?
cisco c1000-8p-2g-l
Dependent on the usage, but 14 watts average for this unit. Reality will show once itās installed.
Iāve also bought the c9105axi-e as a wireless access point. If I get that working correctly Iāll replace all my access points by Ciscoās.
Here are my costing for a year based on 31.1p kWh, when I looked into its while back using a Watt plug in meter. These values will vary depending on type/volume of music played, but may give an idea.
Typically my house uses 200-280 Watts at night. Fitted a few Tapo Smart Plugs to turn things off at night that I dont need, but not able to make a large impact on that figure now.
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So thatās about Ā£250 p.a. for a 6-box system then.
Add to that the increase from 31p to 50p per kWh (i.e. about Ā£400 p.a.) - plus the much higher daily standing charge (which you have to pay even if you have no hifi system).
As Guinnless said above: āthese are the accepted running costs of high spec Naim kitā.
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It was, yes.
Thereās not a lot of choice otherwise things donāt work.
Increase to 50p per kWh?
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