Question: How do I produce a record over time of what I Export to the grid?
- I have x1 emonPi (Solar Bundle version) in a barn (no PV on this circuit)
- I have x3 emonTx c/w ESP8266, (house, loft & garage), & this circuit does have PV panels & an Export meter.
These units are all in separate buildings, & all communicate to emonCMS via WLAN, & I have created a variety of Inputs & Feeds on emonCMS.
Merely subtracting the generation feed (G) from the usage feed (U) won’t work, because (in an extreme to highlight my point) if 90% of generation happens during the day but 90% usage happens at night, then U minus G will not give me the export (E) or import (I) values that I am looking for.
Am I missing something here?
When one version of the emonPi is described in the shop as the “Solar PV version”, what does that actually mean? Do I need to have an emonPi Solar PV version on the circuit with the PV panels? The reason I don’t is that I need the additional inputs that the emonTx’s give me.