PedramCarter :
USAFRet :
KWH = kilowatts per hour
If your system uses ~600w at full load, and it is running 24/7 at 100% load, you will pay ~4.3 quid per month to run it.
(based on your 0.10p per kwh)
However, since it is NOT running 100% load 24/7, your monthly cost will be less than that.
I don't even know how the hell it works the system I have tracks how much kwh I'm using it goes up by few per hour I think the actual kwh is £13.40 so how much will it cost to run it on a full month that way? based on my new kwh price
No, your kwh cost is not £13.40.
Looking around, I see prices between 9p and 17p per kwh. (I don't live in UK)
http://www.ukpower.co.uk/home_energy/tariffs-per-unit-kwh