After Scott's first email, that we posted here:
http://www.smartnow.com.au/Current_Cost_ENVI_blog/using-the-current-cost-envi-to-check-for-faulty-appliances/
... we got another email from him this morning:
"My journey of discovery didn't end at the hot water system.
My night time standby power has been consistently over 200 watts since I installed the ENVI. From my googling the average for Australia is 86 watts.... So I turned absolutely everything off in the house. Still reading 140 watts?
Next stop was the power board. I started by turning the obvious circuits off. Stovetop, oven, aircon ciruit.
As soon as I turned the airco circuit off, the meter dropped [130W] to 10 watts. I was dumb founded. The aircon was not running, but turning the circuit back on showed it consumes 130 watts in standby.
I confirmed it was the outdoor component of the split system by turning the isolation switch off at the outdoor unit.
[Once I'd turned this off, the house draws] only 10 watts in use (which is the dc converters for the down lights)."
We did some quick maths on Scott's findings.
130W = 0.13kW.
0.13 x 24 hours x 365 days = 1138 kWh (or units of electricity) used per year!
At $0.20 per kWh (that's an average across Australia) that's $228 a year.
Over ten years, that's $2280, assuming that power prices aren't going up!
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