Energy import example

Abstract

The so called "Energy import" is inspired by PVOutput energy import chart.

If the generated power (Net power) is greater than the consumption, the energy import is no more raising.

Charts

PVOutput

PVLng adoption

First there are 2 areas, the overall production (E-Total, blue) and overall consumption (Power consumption, red) over time.

Then the actual inverter yield (P_AC Blockhaus, blue) and actual consumption (S0 consumption, dashed red).

The interesting part is the black Energy import spline, which stays by 2998 Wh since 07:08 here. This means, since 07:08 there is no energy import, only export.

Please note:

• Arrange the channels according their units to the axes!

Definition

Let's start with the meter channels for the areas.

I decided to put all "watt" channels on the left and all "watt hour" channels on the right axis.

E-Total

Definition

We define here a positive cost per watt hour to see later the income amount generated.

(We get here 28.74 cent per kilo watt hour == 0.0002874 Euro per watt hour)

Chart settings

S0 consumption and Power consumption

Definition

Here we need also a special helper channel, the Sensor to Meter proxy.

We have to convert the actual power consumption (Power sensor in watt) into an meter channel (in watt hours) which also sums up the data.

Power consumption [Wh]
  |-> Power usage [W] 

The Power usage is a normal power sensor and the Power consumption is the proxy to convert the sensor to a meter channel!

Chart settings

For Power consumption we are also interested in peek powers used.

PAC

Definition

Simply the actual generated inverter power:

Chart settings

We are also interested in the max. value.

Energy Import

Definition

Here we need a channel based on the Import / Export channel type.

We define here a negative cost per Wh to see later the amount consumed.

(We pay here 23.44 cent per kilo watt hour == 0.0002344 Euro per watt hour)

Chart settings

Result

Now we can put this all together:

In the Charts view we will have this:

• We have consumed 4.6 kWh, but bought only 2.8 kWh and have a win of € 4.79 at the moment!
• The Amount column will only be filled for meter channels.
• The Cost column will only be filled for meter channels with costs defined.