Principles I apply for naming my measured circuits:
- Circuits: Use nice names, such as “PowerpointsUpstairs” and “LightsOffice“. Note the category is prefixed. It’s nice if there are clearly defined categories (Lights, Powerpoints) but this is not always the case (e.g. mixed circuits), so don’t worry too much.
- Categories: for categories of one, don’t do anything. For categories such as Powerpoints, create a IotaWatt output which sums them together and call it (e.g.) AllPowerpoints.
- Consumption: sum all consumption
- Production: sum all production. Simplest to keep this positive, but should be negative technically.
- Incomer: can be positive (importing)or negative (exporting)
|grid||+ve (import) or -ve (export)||Power/energy taken from or injected into the grid connection. This is what’s measured by the (smart) meter installed by your grid operator||= use – solar|
|use||+ve||Total power/energy consumed in your house, by all your circuits|
|solar||+ve (production)||Power/energy produced by your solar installation.|
|solarConsumed||+ve||Solar energy produced and consumed inhouse.||= MIN (Solar ; AllConsumption)|
|import||+ve||Energy from grid||= MAX(0 ; Grid)|
|export||+ve||Energy to grid||= – MIN (0; Grid)|
|+ve||Measured circuits in house|
|user_heatpump||+ve||Grouping of certain measured circuits (in this case inside and outside units of the split-type heat pump)||= user_heatpump_inside + user_heatpump_outside|
|user_other||+ve||Power/energy use of all other circuits, which are not measured separately||= use – SUM( all measured circuits in house)|
Note the convention for positive and negative. Technically for a control-volume / energy balance approach, all production should be negative. Then you can sum everything and get zero. However, it is confusing for people when you graph things later. So I made everything positive. The exception is Incomer (aka Net) which can be positive (importing) or negative (exporting). This is a bit hacky, but conforms to current norms and people’s expections.