NEM (Net Metering Mode) Setup

Hi,


I wonder how to setup the NEM Mode.   I switched from the Normal Mode to NEM, but the Dashboard is empty and all the reports are blank too.   Only the Power Now value is displayed correctly.

Thank you.


PS: I'm not sure I need to choose the NEM in the iMeter for my setup or not.  Residential rooftop PV in Thailand is based on the NEM scheme.

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Besides selecting the "NEM" option from the IAMMETER system, you also need to switch on the NEM mode from the energy meter.

It is achieved by calling a local API 


Just call this local API by HTTP get

HTTP://ip/api/netmetering?nem=1

For more details ,please refer to

Please refer to https://www.iammeter.com/docs/net-energy-meter#how-to-turn-on-nem


Before you open the NEM function by this local API from the energy meter side, there are only three data columns, each column represents each phase of energy data. There will be no NEM result at this time. So even if you select "NEM" mode from the IAMMETER system because there is no NEM data, there will be no data display.

After you call the local API and open the NEM function from the hardware, there will be a fourth column that represents the NEM result.
Then there will be data displayed on the IAMMETER system when you also select the "NEM" mode from the IAMMETER system.

Hi Bordin

I have forwarded your issue to my colleague, he will check and solve it ASAP.



For the security concerns ,please do not send your SN in this public forum, so I will delete the post that includes the SN.



Please do not worry, I have already got your problem,


bordin

Thank very much laoliu.  I repeated the instruction steps, a few times.I think the system has 4 data columns ?{"method":"uploadsn","mac":"047863BBDEFD","version":"2.75.76","server":"em","SN":"xxxxxx","Datas":[[226.9,1.96,422,927.911,455.567,50.01,0.95],[229.4,0.64,123,1089.520,495.538,50.01,0.83],[235.1,7.44,1701,787.338,662.502,50.01,0.97],[230.4,0.00,2246,2650.046,1458.981,50.01,0.97]]}but the Dashboard is still empty. 

The configuration seems to be ok.  The mobile iMeter Web can show the 3-phase chart, but not the desktop web, still empty.  


FYI.

Hi BordinI have forwarded your issue to my colleague, he will check and solve it ASAP.For the security concerns ,please do not send your SN in this public forum, so I will delete the post that includes the SN.Please do not worry, I have already got your problem,bordinThank very much laoliu.  I repeated the instruction steps, a few times.I think the system has 4 data columns ?{"method":"uploadsn","mac":"047863BBDEFD","version":"2.75.76","server":"em","SN":"xxxxxx","Datas":[[226.9,1.96,422,92

Hi,

My colleague had already fixed this issue yesterday, please check whether it had been resolved?
This issue is introduced by the latest upgrade last week, affecting the overview page NEM(net energy metering) power reading display.
Only exist in NEM mode and web system.
APP will not be affected, normal mode will not be affected either.

The configuration seems to be ok.  The mobile iMeter Web can show the 3-phase chart, but not the desktop web, still empty.  FYI.

Hi @laoliu,


The web system works fine now.  See the attached photo.




BTW, on the APP, the chart always looks like this one, even the Normal Mode is chosen, i.e. there is only a single line of graph.  Nonetheless, the calculation might be different.


I have another suggestion. :)  For a multi-phase setting, it might be confusing, as I have encountered.  If there are more than one measured power line, then the system should display something to inform the user, that the graph is a "summation".


I haven't realized this discrepancy between the APP and the Web interface until enabling the NEM Mode.  The APP's chart always shows one line.


However, the 3-phase chart is very useful.  Can you make this chart still available on the NEM Mode on a multi-phase metering.  


Thank you.

Correction:  Not the APP.   The Mobile Iammerter Web, using Chrome through a mobile device,  always displays one line.

Hi @laoliu,The web system works fine now.  See the attached photo.BTW, on the APP, the chart always looks like this one, even the Normal Mode is chosen, i.e. there is only a single line of graph.  Nonetheless, the calculation might be different.I have another suggestion. :)  For a multi-phase setting, it might be confusing, as I have encountered.  If there are more than one measured power line, then the system should display something to inform the user, that the graph i

Hi: 

Both app and webapp share the same logic, only display one power reading in the chart. (The original idea is what displayed on the screen of the mobile must be as simple as possible, displaying three lines in the power chart may be a little messy)

In normal mode, this power reading is the sum of the three phase .
In NEM mode, this power reading is the power in NEM mode.

As the screen of the mobile is larger more and more, we have planned to upgrade the app recently(the web app would always have the same function as the APP except in the local mode)
1 display three-phase power reading in the power chart.
2 Expand the power chart when the customer clicks the chart. Then the customer can select the time range and app will return the kwh/bill analyze of the selected time range(same as the function in this topic just provided in web system).

Correction:  Not the APP.   The Mobile Iammerter Web, using Chrome through a mobile device,  always displays one line.

It's a great.


BTW, I wonder how these 2 calculations differ.


In normal mode, this power reading is the sum of the three phase .
In NEM mode, this power reading is the power in NEM mode.

Please refer to 

https://www.iammeter.com/docs/net-energy-meter#nemnet-metering-mode-function

It's a great.BTW, I wonder how these 2 calculations differ.In normal mode, this power reading is the sum of the three phase .In NEM mode, this power reading is the power in NEM mode.

If this statement "assuming that the power in each phase remains constant within one hour " is not valid, how exactly the NEM calculates the grid consumption and exported energy.   In other word, a real life example (calculation) would be very helpful for understanding.


Please refer to https://www.iammeter.com/docs/net-energy-meter#nemnet-metering-mode-function

Hi:

Using a fixed power value in one hour is just a simple example to illustrate how the NEM mode works.
In my opinion, the difference between normal mode and NEM mode in fixed power value within a fixed period is already clear enough

If you want to know more about what is "net energy metering", please search the keyword on the internet.
But as I know, most of the articles use the fixed power value to illustrate the difference either.

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