[djwakelee]

The AC adapter was available for the original Vue.  The Vue 2 does not support that connection method – must be hard wired direct to the hot legs.  The original Vue and most accessories are no longer available on the Emporia site for purchase.

[djwakelee]

CTs are not standardized.  Besides physical and electrical connector differences, each has a given Amps to Volts conversion ratio.  So you’d first need to understand what the CTs specs are between the different devices.  If they aren’t the same current to voltage conversion factor, Emporia will let you scale readings in the software, but this isn’t always ideal.  Also, to get accurate readings, CT’s need to be coupled to an electrical circuit which is properly matched to the transformer (so called burden or loading).  If not matched, you may have inaccuracies for large or small current measurements.

[djwakelee]

The CT must go on the hot (live) power feed wire only.  If you were to clamp it across all conductors like you suggest (live / neutral / ground), the live and neutral current flow would cancel out (subtract), and you would read zero current flow under all conditions.  This is not an Emporia thing specifically – true for monitoring any current with a CT in general.

One thing you can do in the UK with single phase is that you can reverse the CT, and clamp over just neutral instead of live.  That will also work (since AC current flows between live and neutral and vice-versa), but I’m not sure if that helps your situation or not.

• This reply was modified 2 years, 8 months ago by djwakelee.
• This reply was modified 2 years, 8 months ago by djwakelee.

[djwakelee]

Duplicate question – see below. Sorry, this is not possible with the Emporia Vue 2 hardware. If your main breaker is off (due to generator safety interlock), there is no current flow in the Vue2 mains clamps so it cannot detect when grid power is restored. Need an electrical field sense device to do this.

Notification of Power Restoration After Power Outage

[djwakelee]

Ultimately I believe it doesn’t matter since Emporia presently only takes an absolute value of the clamp readings – with solar as production and everything else as load (consumption).  But the arrows face toward to power flow.  So toward the load for circuits, or toward the panel for solar.  This is detailed on page 5 of that document, with an enlarged focus area for the solar clamps at the bottom of that page showing the K->L direction.

[djwakelee]

By chance, have you read the solar installation guide?  It is separate from the standard install manual.  Below is a link…

https://www.emporiaenergy.com/Gen%202%20Solar%20Supplement.pdf

And yes, you need dedicated clamps across your solar in order to monitor solar production.  Setup will try and figure this which circuit you have for solar, which is why it asks you to shut off solar and then turn on.  You will probably need to re-run setup when you get those clamps on.  You can also just change the circuit type to solar production by editing the settings, but best to re-run setup.

 

[djwakelee]

Definitely sounds like your Vue2 is defective.  Start a Chat with Emporia – they are very helpful and responsive that way.

[djwakelee]

Sadly no.  There have not been any app or functionality enhancements regarding monitoring with multiple Vue2’s, nor better 240V circuit support.  Emporia’s focus seemed to be working on the EV car charger.  They also released a web site – in addition to the apps.  But all the functionality on the app remains fundamentally the same as it has been over the past 9 months ago.

[djwakelee]

Can’t comment on the Android app, but yes you don’t use the main CTs (nothing on the A/B/C ports) if installing a 2nd Vue2 to monitor additional circuits.  You only use the mains CT ports on additional Vue2’s if they are being used in a subpanel.

[djwakelee]

I had a similar problem where a power interruption (and restoral) resulted in no data updates (Vue2 seemingly offline).  I also have 2 Vue2’s, and only 1 was in this state – despite power cycling.  Turned out that the WiFi router needed to be rebooted.  There is some issues with NAT and port forwarding that the Vue2 seems to be unhappy about.  Perhaps this is worse for people with multiple Vue2’s.  So next time this happens – try powering down your all your Vue2’s, power down your WiFi router and re-power, then re-power the Vue2’s.

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

[djwakelee]

As currently implemented, Nesting is only appropriate for using the 2nd Vue2 with its mains clamps on a subpanel and its circuits.  When you want to want to just measure more than 16 circuits on the main panel, the present approach is to not nest – and not use a 2nd set of mains clamps (leave A/B/C unconnected on the 2nd Vue2).  In this configuration, your balance on Vue2 #1 will equal the sum of the circuits on Vue #2, and all the math will still work.  Any solar should be on Vue2 #1 (the one with the mains clamps).

Emporia has promised updates to better handle multiple non-nested Vue2’s.  That and other features (like better 240V circuit support) seem to be continually postponed.

[djwakelee]

This is a known issue.  Although the clamps are able to measure current flow either direction, currently Emporia is taking the absolute value of the current readings.  Loads are always shown as positive, and solar always negative.  The feature has been requested – vampire draw of the solar inverters is not taken into account as you note.

[djwakelee]

Yes, for a split-phase setup where you’d use the A and B clamps over each 120V leg (like here in the US), it would expect those to be 180 degrees out of phase with each other.  And if 3-phase power, 120 degrees out of phase for each A/B/C clamp.

[djwakelee]

The 200A clamps are for connection to single phase, split phase (aka 2-phase), and 3-phase mains (1-3 ports and clamps used depending on electrical service).  For the UK, you are 240V (50Hz) and single phase.  That would mean you would use a single 200A clamp for your combined mains power feed (before both meters).  You can’t use another 200A clamp (on the A/B/C ports) to measure a separate circuit, such as you are trying to do with heat and other loads.  That is where you would use the 1-16 ports and the 50A clamps.

If you can’t place the single 200A clamp before the two meters (physically, etc), you can purchase a 3.5mm Y cable and combine (2) 200A clamps into the single A port.  That way you can get the combined reading for your domestic loads and heat, and clamp after those meters.  If you want to then know the individual power in each, that is where you would add the 50A clamps (connected to ports 1-16) and clamp those around the circuits you want to specifically monitor.

After you make this change, you’ll probably want to re-setup the software as it is surely confused by seeing power on something other than the A port for a UK installation.  It is probably improperly assuming split-phase currently, if you are indeed using port B (which shouldn’t be being used for single phase).

Hope that helps.

• This reply was modified 2 years, 11 months ago by djwakelee.

[djwakelee]

Agree this would be a welcome feature.  Note that this is typically not done on UL listed / NEC compliant energy monitoring products due to the fact they are designed to be placed inside the electrical panel.  Under a fault condition (such as chafed insulation in the Ethernet cabling, etc) a short circuit would electrify the lower voltage signalling circuits leaving the box – presenting a high voltage on the Ethernet cabling and end-device.  Because of such a scenario, it is generally not permissible by NEC to have low voltage wiring coexisting unchecked with AC mains voltage – and leaving the box.  Special physical partitioning is required to isolate the high and low voltage aspects, and this would not be present in a standard electrical panel.

Some Ethernet energy monitors (like The-Energy-Detective) get around this by using power line communication and having the Ethernet gateway outside of the panel. But typical PLC challenges apply with that approach (interference, reliability).

• This reply was modified 2 years, 11 months ago by djwakelee.
• This reply was modified 2 years, 11 months ago by djwakelee.

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