Vue Gen 2 Voltage measure.

[ddv2005]

Hello,

I just bought Vue Gen 2 and was surprised that there are no voltage at all. FAQ indicate that Vue Gen 2 measure voltage and use it to calculate wattage. But another answer in FAQ tell that Vue use constant 120V to calculate wattage. What is the TRUTH? Looks like Vue Gen 2 do not use voltage at all and it is FAKE wattage because voltage is +-10% of 120V in US there are NO WAY to measure wattage without voltage. Without voltage, it is just a toy that measures ANYTHING. Also looks like Amps is fake too and it is just W/120V but not actual current.

But if Vue Gen 2 measure voltage then it MUST be reported to correct W->Amps conversion.

Looks like Vue Gen 2 is big FAKE but not actual energy monitor.

[djwakelee]

Yes the Vue2 measures voltage (for both phases).  This corrects a big issue issue with the original Vue, where it indeed did make assumptions of 120V and power factor of 1.0, which gave false readings with inductive or capacitive loads.  Basically the original Vue showed you VA for power, and not Watts (which must take into account power factor).  The Vue2’s power reading is quite accurate, +/-2% spec I believe, and generally within that or better – for all types of loads.

If your concern is that they don’t display the mains voltage with the app, that is true.  The app is a work in progress – they just added support to show Amps for both phases separately on the mains (when in Amps view).

• This reply was modified 2 years, 10 months ago by djwakelee.

[ddv2005]

It is very good. But current Amps values in chart exactly Watts/120V (because there are no voltage in cloud data). Do you plan to report voltage as well in feature?

[djwakelee]

I believe you identified the issue – only power readings are fed to the cloud – similar to the raw .csv data that you can request.  So the amps reading in the app is being ‘manufactured’ and not real, since that data was never sent up.  Internally the device itself knows the mains voltages, current on each clamp, and power factor – as it correctly calculates the power.  But without that raw information going to the cloud, it will only be an approximation for anything except W or Wh.

Their focus to date has really been on the energy aspect, not using the device as a Voltmeter or Ammeter.  Seems like a reasonable request to improve – may want to post in the New Feature Request forum here.

• This reply was modified 2 years, 10 months ago by djwakelee.

[scrambler]

Getting Volts, Amps, and Power factor is HIGH on my list of wanted improvement.

This would not only make the Vue a great monitoring tool, but also a great troubleshooting device, which is especially valuable for solar users.

[wz2b]

Thumbs up, I’d like to be able to get the voltage as well.  Less important but still useful would be frequency – California Rule 21 and IEEE 2030 define two curves (watts and vars) based on frequency.

[scrambler]

I see you want to do the same as me, and yes, Frequency would be good too 🙂

 

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