Having implemented mains kwh monitoring and then also heating, heatpump and warm water monitoring I would like to calculate net power use by using the following formula:
Main fuse watts
- heat pump watts
- heating watts
- warm water watts
= Net use watts
Would it be possible to add "- input" to the processing or is my only alternative to generate negative values in emonTX for this kind of calculation ?
Re: How to: "- input" ???
You could turn it on its head:
heat pump watts
+ heating watts
+ warm water watts
X -1
+main fuse watts
Lloyd
Re: How to: "- input" ???
Excellent - thank you. Now feeling a bit silly as the brain was not working when thinking about this. Anyway now can isolate the energy needed for heating and warm water from the rest of the energy consumption for the house.