30 of 30 people found the following review helpful
Not perfect but worth having.,
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This review is from: Efergy E2 eLink Wireless Smart Power Meter - Energy Saving Monitor (DIY & Tools)
I brought the Efergy E2 a couple of months ago after reading some reviews for the E2 and it's rivals on various sites. All of the energy monitors had their detractors but the E2 got my vote because it came with the ability to download the usage data to a PC and graph the data.
The big question for me was always "does it really work?". The answer is sort of. Since I installed the E2 I've been keeping a record of the actual electricity meter readings versus what the E2 has recorded as my electricity usage. I've been comparing the readings at 5 day intervals for about 2 months now and found on average over the last 2 months the E2 has shown my electricity usage as 8.5% higher then the actually usage. The closest it has been to the actual meter reading over 5 days is 5%(higher). Does it matter that it is not 100% accurate? Not to me. At all times it has given me a good indication of what my electricity usage is on a daily on minute by minute basis. And that is what I brought it for. The fact that in tends to exaggerate my electricity usage a bit just makes me more determined to keep that instant KW reading on the display as low as possible. The E2 is very good at showing the impact of turning appliances or lights on or off. The only exception to this is when they are low energy lights of equipment such as mobile phone chargers. Frequently the turning on or off of such things goes almost or completely unnoticed. But I sort of expected that since they use such little power.
I was already in the habit of not leaving appliances in standby but I still wanted to see what the minimum electricity usage in our house was and whether we could reduce it. The monitor has opened my eyes to a few things I had not considered before. Some examples are:
Halogen down lighters use a lot of electricity.
My broadband modem and network switch are worth turning off at night.
It is worthwhile turning our computers and monitors off at the wall each night.
I also found the E2 monitor easy to setup. It was simply to install the sensor in the mains box (My house is about 12 years old) and easy to get the display unit up and running. The sensor clamp is a little loose around the mains cable but there doesn't seem much I can do about that. In total it took about 5 minutes reading the manual and 10 minutes to follow the well written instructions provided.
The monitor functions are very easy to use and I've found the big screen great as you can read it from quite a distance so no need to keep walking up to it to see what is happening. The provided software is also pretty good, looks professional and again is simple to use as the E2 connects to your PC like any other USB type device.
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Initial post: 18 Jun 2010 07:53:08 BDT
Mr. I. English says:
On the original uinit, the voltage had to be set, i.e. 220, 230, 240 Volts, If this is set wrong the meter will not be as accurate.
Remember for the same power used (watts) the high the Voltage, the lower the Amps will be.
If the unit is showing 8% to high, by changing the voltage to a lower setting i,e 230 down to 220, this should bring the units output more into line with the real meter.
It will never be 100% as the supply voltage flutuates, 10% in the allowable supply flutuation. (excuse the spelling).
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