Powerusage Plugwise

Post by **Verkenner** » Sun Jan 11, 2009 12:06 pm

On januari 6 I connected Plugwise (With http-server On) beside HomeSeer on my Win-XP-Desktop. From that moment the usage of my desktop was approximately 5 watt more. See chart.

btw: the spikes in the chart are caused by the nightly Active-Backup. I backup HomeSeer at 04:00 uur to a Network drive.

Verkenner

Post by **Digit** » Sun Jan 11, 2009 12:28 pm

Funny.... I can see from my CPU chart that the Plugwise source is causing my CPU to go up between 2 and 4%; it's the heaviest task that is running.

Post by **tazdevil** » Sun Jan 11, 2009 2:38 pm

And every circle is using 1 watt of power. So if you're using plugwise for standby killing, the standby usage must be at least 3 watt otherwise it won't help you that much.

Post by **Lennart** » Sun Jan 11, 2009 2:42 pm

I thought power usage of the circles is 0.6W for the ones that are switched on and 0.2W for the ones that are switched off, according to specs? Did you measure the 1W yourself?

Lennart

Post by **tazdevil** » Sun Jan 11, 2009 2:52 pm

I plugged a circle in a circle and after a day there was a horizontal line very close to the 1 watt. Ok 0,95 watt is possible. All the time the circle was switched on. I'm going to measure it again when switched off.

Post by **Lennart** » Sun Jan 11, 2009 4:55 pm

@Verkenner: As the stick is connected through usb (500mA @ 5V max.), that could account for a maximum of 2.5W. The other few Watts may be due to the software continuously eating some extra CPU cycles.

Lennart

Post by **Digit** » Sun Jan 11, 2009 5:10 pm

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by tazdevil
 And every circle is using 1 watt of power.
<hr height="1" noshade id="quote"></blockquote id="quote">
Strange. During installation i 'stacked' them all for some time, so i should have measured 9-10W at the first one, but i didn't...

Post by **tazdevil** » Sun Jan 11, 2009 8:52 pm

The chart shows about 0,5 watt for a cicle that is switched off. Export to excel shows values from 0,000472 to 0,000491.

Post by **MindBender** » Tue Jan 13, 2009 10:24 am

Most electricity consumption meters are notoriously inaccurate under 3 Watts. And the way some stand-by power supplies work makes measuring their actual consuption very difficult: Some are inductively coupled, others consume relatively much periodically.

Please note that stand-by killers on a modern TV are next to useless: Philips for example goes thourgh great efforts to reduce their stand-by consumption to 0.1 Watt. No stand-by killer kan beat that.

Post by **Duckyduck** » Sat Feb 28, 2009 11:12 am

Don't have the exact figure here, but we've measured (power analyser) 3 power "stages".
- Just plugged in, relay off, something in the range of 0,3..0,4W
- Just plugged in, relay on, 0,7W
- A few seconds after plugging in, relay on, 1W (probably the radio is on here)
If the latter is the case(radio on), then probably standby is about 0,6W relay off and 1W relay on..

The implemented HW has a pretty accurate measurement circuit based on a Microchip power-measure chip. Haven't tested the measure accuracy.

Post by **Reinder** » Sun Mar 15, 2009 11:05 pm

Information above is correct.
The plug uses with relay on 0,7W and with relay off 0,4W.