input - input = feed | Archived Forum

Submitted by smitt1979 on Thu, 26/11/2015 - 23:06

This is properly a really easy thing to do but i can't seem to work it out

i have two kWh/d inputs

5.1 Grid Power

5.2 Solar Power

i'd like to subtracted the Solar Power from the Grid Power and then output the result to its own feed to use in a dial

Grid Power - Solar Power = power balance

can anyone help me do this

Thanks Steve

Submitted by smitt1979 on Fri, 27/11/2015 - 15:09.

Its OK worked out a way to do it

Submitted by Beire on Fri, 27/11/2015 - 15:48.

How did you do it?

Submitted by smitt1979 on Fri, 27/11/2015 - 23:24.

i updated to emoncms 9.2 then add a new virtual feed

i used the +feed and add Grid Power then a -feed for Solar Power

see image

Steve

Submitted by Paul Reed on Fri, 27/11/2015 - 23:36.

Can't see the screenshot very well...

Paul

Submitted by smitt1979 on Fri, 27/11/2015 - 23:40.

Better image

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