Surplus solar energy charging
Only use the surplus of your solar energy to charge your EV. To minimise your energy returned to grid.
Restrictions:
- EV’s generally require a minimum of 6A (1.4kW) to start charging
- Current adjustment is at 1A resolution so you will not always get 0 (1A = 220W )
The flow supports dynamic phase switching between 1 and 3 phases
(Switching does require a Off+On of the Amina to be effective)
Below is my flow (which is also usable for other chargers, with adaption of variables to other the other app)
- the flows input is the energy level from my meter P1
- Target is Zero on the Energy
- a second flow will trigger calculation of the energy every minute using the insight trends reloaded app to provide the mean value over 1 minute (the input)
- The setting over the charger is based on the current settings minus the energy measured (P1). So return (negative) will increase the charger current
This flow calculates the trend:
This part of the flow calculates the required current setting of the charger:
(Based on zero energy on P1)
This flow determines the setting of the charger (off, 1phase, 3phase)
you can Import this flow
You can import this flow into your homey using the flow exchange capability of the device capabilities app.
Find the instruction on howto download a flow in the device capabilities thread
- install the Amina app before importing this flow
- Install the Power by the Hour app
- Install the Youless App (or replace the tags with tags of a different P1 meter)
- Install the Insight Trends app
Create the following Variables
- Amina I 1ph New: calculated current for 1 phase charging
- Amina I 3ph New: calculated current for 3 phase charging
- Amina I correction: a correction factor to compensate low setting
- Amina 3/1-phase switch: Y/N to prevent flippering
Troubleshooting variables used:
- Amina Compare: Variable to verify if Amina Compare is set correctly
- Amina I 1ph noRound: calculated current for 1 phase charging without rounding
- LS-energy-W-median for monitoring the input value
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