@jeremypoulter has been using these solar PV data samples to simulate OpenEVSE solar PV divert:
Work has begun on improving the OpenEVSE solar PV divert, these improvements will be back ported to the ESP8266 WiFi 2.x version but first implemented on the ESP32 Wif 3.x version see:
opened 01:38AM - 11 Feb 20 UTC
closed 12:03AM - 09 Jun 20 UTC
enhancement
Currently, when charging using "Eco Mode" (solar PV divert) the EVSE will contin… ue charging at the lowest current (6A) forever until the EV is fully charged even after the solar PV has stopped generating.
A highly requested feature is for the charging to stop after the solar PV has stopped generating. This will allow users to then use a timer charge to topup the remaining amount required during off-peak hours.
I propose changing default Eco Mode behaviour to start the charge once solar PV / grid export > 500W for 15min and stop the charge if solar PV / grid export < 500W for 30min.
This feature should be backported to ESP8266.
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As an advance option the user could adjust these parameters, however minimum values should be set e.g >100W for 10min stop to avoid excess contactor wear caused by regular stopping / starting.
Another extension to EcoMode is for the charger to revert to charging at full power if the timer becomes active during an EcoMode charging session.
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