Measuring consumption of energy supplied from solar plant 1

[bobdx_cool]

I have solar plants installed across multiple rooftops in my space. The output of the 3 phase inverter in each building is connected to the electrical panel board of the same building. The output of the inverter is connected to the same bus bar of the electrical panel board of the building which receives the 3 phase power from the electricity distribution company. Now, I am interested in finding out how much of the generated energy from the solar inverter is actually being consumed in the building. For this I wanted to know how I am supposed to wire the energy meter in the building?

This is the energy meter I plan to use:

https://www.se.com/in/en/product-range-presentation/7632-em6433-energy-kwh-meter/#tabs-top

 

[itsmoked]

Wait. Are you telling us you have a three phase grid-tie inverter and it doesn't have full metering included in it? If it doesn't have a display it should be web accessible.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[waross]

You may need more than one meter.
You will need a meter the output of each inverter if the inverter does not supply this information.
Then, to discriminate between grid supply and solar supply you will need to meter the energy returned to the grid.
The utility revenue meter will have this information but it may not be available to you.
The issue is that at times part of the solar energy may be returned to the grid.
The number that you need is the total KWHrs of energy from the solar, and the KWHrs of energy returned to the grid.
Total solar energy minus the energy returned to the grid will be your building consumption of solar energy.
If you are not able to gain access to the negative KWHrs from the revenue meter you will have to install your meter on the incoming line.
If you cannot access the KWHr information from your inverters you will need to install a meter at each inverter. (Or group of inverters feeding a common point.)

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[DTR2011]

In addition to several meters, you
May need some kind of PLC to do the math.

 

[bobdx_cool]

@waross I have to access to kwhrs from the inverter software. But I dont have information from the revenue meter regarding the kwhrs returned to the grid. So now,how I do I wire the new meter in the electrical panel board of every building so that I can subtract the kwhrs of this meter from the kwhrs of the data from the solar inverter?

Please note that the solar inverter cable is connected to the same bus bar as the electricity supply company cable is connected to in the electrical distribution panel of the building.

 

[waross]

The meter should be installed on the cable feeding the common bus.
The meter must be able to show both power in and power out.
It is not clear from the information that you have provided if the chosen meter is suitable.
Found this;
"4 Quadrant energy : bi-directional, absolute & net"
That should work.

Bill
--------------------
"Why not the best?"
Jimmy Carter