All OpenEVSE and EmonESP units we have ever shipped (until July 2020) contained an ESP8266 WiFi module running OpenEVSE WiFi 2.x firmware. This WiFi module has now been superseded by the ESP32 WiFi module running OpenEVSE WiFi 3.x firmware. The new ESP32 WiFi module has been getting all the new shiny features and will continue to receive updates and new features going forward.
However, we have managed to backport some of the most significant new features to the ESP8266, this means that all existing OpenEVSE / EmonEVSE users should be able to easily apply this update via the OpenEVSE WiFi web interface without any hardware upgrades
See the OpenEVSE ESP8266 WiFi V2.9.0 Github Release page for the pre compiled .bin which can be uploaded via web interface.
Significant update to solar PV divert functionality:
- Eco Mode is now pervasive between charging sessions
- PV divert (“Eco Mode”) will now pause charging once solar PV / Grid IE drops below the minimum (6A ≈1.4kW) and will resume when more power is available.
- Charge current calculation is now processed via a smoothing algorithm to avoid any stopping/starting charging unnecessarily
- Timer charge functions as an overnight boost timer’. If EcoMode is left enabled and a timer is set e.g overnight off peak period, the EV will charge at full current for the duration of the timed charge.
- Improved user display to communicate charging state e.g “Charging from Solar”, “Waiting for Solar” etc
- Enable ‘advanced’ mode to adjust smoothing and minimum charge time settings:
Here are some example of the new solar PV divert in action: