Solar Net Metering and How Does it Work?

Setting Up  Emporia Vue for Monitoring Solar Power Generation

The app will walk you through this process. You will need to turn off any generation while the Vue is being configured.

In your panel:

  • Ensure that your 200A sensors are installed to measure directionality. The small ‘L’ on the clamp bottoms must go toward the load (toward your breakers) and the ‘K’ (and the Emporia logo on the front of the clamp) must go toward the utility (toward the electric meter). Remember to be careful that your service mains are always dangerously energized.

On your phone:

  • Make sure you’re in Bluetooth range of your new Vue. Follow the registration steps in the Emporia App. As you go through the onboarding flow, you’ll see a screen to setup your Vue for solar.

Nett Solar Metering

Emporia Vue solar installation

The Emporia Vue is capable of monitoring your solar production. You will install your Vue differently depending on whether your solar is a breaker-fed or a line-side tap installation. These installations are covered in the subsequent pages. If you are interested in monitoring how much energy you are pulling and sending back to the grid, you’ll need to utilize 50A CTs as described below.

Net metering

The 200A CTs that connect to your mains will provide net metering out of the box — displaying electricity used minus electricity produced. To ensure the Vue can correctly measure net metering, the 200A CTs must be correctly oriented and be placed between the meter and the incoming solar.

Energy in from and out to grid

For the Vue to be able to calculate how much energy your system is getting from and sending out to the grid, you’ll need to employ (Three) 50A CTs on the incoming leads from your inverter. Installation depends on where these leads enter your system, which is illustrated in detail on the next two pages.

Breaker Fed Panel

Breaker-fed solar installation

For breaker-fed solar installs, the ( Three ) 200A CTs need only to be installed between the meter and the main breaker for net metering. To monitor how much energy is pulling from and sending back from the grid, install a 50A CT on each of the leads coming in from your inverter to the breaker. Ensure the directionality of all CTs is correct

Line Side Fed Panel

Line-side tap solar installation

For line-side tap solar installs, the 200A CTs must be installed between the meter and incoming feeds from the inverter. To monitor how much energy is pulling from and sending back from the grid, install a 50A CT on each of the leads coming in from your inverter to the mains. Ensure the directionality of all CTs is correct.

Net Metering Display on Emporia App

Emporia App Provides crucial data on Gross and Nett Import & Export of Electricity with Grid, Plus Gross Solar Generation. The above data here ( in pic)  seen along with consumption.


Troubleshooting tips

If you’re not seeing net metering or grid measurements, try the following:

Ensure the 200A CTs are clamped on the mains between the meter and incoming leads from your solar inverter.

Ensure all CTs are oriented as per the instructions. CTs are directional.

Check that the appropriate wiring harness wires are attached to adjacent breakers on different phases as described in the Gen 2 Vue Installation Guide.

When configuring the Vue with the App, make sure that you temporarily turn your solar off so it is not supplying power to your system. Try running the configuration at night.

When configuring the Vue with the App, make sure that there is a decernable load on your system. Try turning on an oven, A/C, or dryer.


Technical details

Energy Monitor

Power supply input: 100-240VAC 1Ø, 50/60Hz, 0.041A

Fuse: 260VAC/0.3A  (Fusible resister: 10E, 1W, 5%, TH)

Power usage: < 11 Watts

Wi-Fi: 2.4 GHz 802.11b/g/n

Operating conditions: -40° -122° F (-40° - 50° C) 0-80% RH

200A Current Transfomers

Max current: 200A Cable length: 1 m

Inside diameter: 26 mm

50A Current Transformers

Max current: 50A Cable length: 1 m

Inside diameter: 10 mm

The Emporia Vue energy monitor and current transformers are considered a system designed for field installation in a switch enclosure as per section 312.8(B) of the 2017 National Electrical Code (NEC) regarding Power Monitoring Equipment. The Vue is considered a non-invasive load monitor (NILM) and as a non-permanent fixture, it is acceptable to install in an electrical panel.

The Emporia Vue Smart Home Energy Monitor contains FCC ID: 2AS6P-EMCTV2 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body.

Caution: Any changes or modifications not expressly approved by Emporia void the user's authority to operate the equipment.

I.T.E. Energy Monitor E506714