bobmabena 0 Posted November 25, 2020 Share Posted November 25, 2020 Does anyone know how accurate the Efergy energy monitoring product is? I've been using one for a few months, but, after getting a bit of a shock elec bill from the municipality, I did some maths... COCT says I used 925kWh vs the Efergy Engage platform's 761kWh That's quite a difference... Quote Link to post Share on other sites
Vassen 122 Posted November 25, 2020 Share Posted November 25, 2020 3 hours ago, bobmabena said: Does anyone know how accurate the Efergy energy monitoring product is? I've been using one for a few months, but, after getting a bit of a shock elec bill from the municipality, I did some maths... COCT says I used 925kWh vs the Efergy Engage platform's 761kWh That's quite a difference... it depends on your loads to a certain extent. The efergy is only really measuring current through the ct. It does not measure voltage as this is set by you. However, grid voltages are not always stable and vary a bit at different times of the day. The other issue with the efergy is that it does not measure power factor so also adds to inaccuracies especially if your have lots of motor loads. they are fine to get a rough idea of usage but should not be relied on heavily. bobmabena and Richard Mackay 2 Quote Link to post Share on other sites
Stanley 76 Posted November 25, 2020 Share Posted November 25, 2020 3 minutes ago, Vassen said: The other issue with the efergy is that it does not measure power factor so also adds to inaccuracies I agree, but not taking power factor into account should mean that the Efergy meter reads more than your actual consumption, not less. Which makes the discrepancy between the CoCT reading and the Efergy meter even worse. Quote Link to post Share on other sites
Vassen 122 Posted November 25, 2020 Share Posted November 25, 2020 1 minute ago, Stanley said: I agree, but not taking power factor into account should mean that the Efergy meter reads more than your actual consumption, not less. Which makes the discrepancy between the CoCT reading and the Efergy meter even worse. With mine, the efergy almost always shows more than the actual as seen from eskom bills as well as my inverter readings. Quote Link to post Share on other sites
Richard Mackay 99 Posted November 25, 2020 Share Posted November 25, 2020 The Effergy isn't very accurate but it's great for identifying where the power is being used.. Quote Link to post Share on other sites
Stanley 76 Posted November 26, 2020 Share Posted November 26, 2020 14 hours ago, Vassen said: With mine, the efergy almost always shows more than the actual as seen from eskom bills as well as my inverter readings. That's exactly what I'm saying should happen since it only measures current, but @bobmabenahas the opposite. His CoCT bill is much higher than what the Efergy reads. Quote Link to post Share on other sites
NigelL 112 Posted November 26, 2020 Share Posted November 26, 2020 As far as I remember, the Efergy monitor has a setting where you enter the Mains voltage. If this is set above/below the actual mains voltage, the calculated energy will be correspondingly above/below the metered value. Also check whether the clip-on current sensor is properly attached. The two sensor surfaces must be lightly pressed together (i.e. no gap) and have no cracks, chips or dirt between them. A third possibility is that the Effergy monitor may not accurately record very low-current loads (standby current of TVs, PSUs etc). This can easily add up over a couple of months. Quote Link to post Share on other sites
Richard Mackay 99 Posted November 26, 2020 Share Posted November 26, 2020 The accuracy claimed is >90% Check to see if your readings are within this range.. Quote Link to post Share on other sites
bobmabena 0 Posted November 26, 2020 Author Share Posted November 26, 2020 Thanks everyone... Just checked my settings and the voltage is 230... Updated this to 240... so will monitor moving forward! Quote Link to post Share on other sites
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