zappi 2 – Firmware Version 2.142/2.143 – (Tesla “mini-fix”) Release Notes

(2.142 – 14/12/2019.  2.143 – 16/12/2019)

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The zappi 2 – Firmware Version 2.142/2.143 update has been developed to deal with an issue with Tesla vehicles. This is when they fail to charge at full power even though Zappi is sending a maximum PWM value.    Note – this update is required because the Tesla cars do not adhere to the smart charging standards.

There is still an issue with the Tesla failing to wake up when the Zappi starts a boost or ECO+ charge – this is due to the Tesla firmware.  We understand that they are working on a new release which will fix this problem which affects all smart chargers.

These notes provide details of the new functionality provided as well as the bug fixes and other enhancements.

Instructions on how to update the firmware on your zappi and other myenergi devices can be found -> here <-

zappi 2 – Firmware Version 2.142/2.143 Improvements

– At start of charge PWM is forced to maximum in order to deal with Tesla issue where the charge rate does not correctly follow the PWM signal from the charger

Detailed charge logs

The Charge Log now allows selection of individual charge sessions.  Similar to the Event Logs, the user can now read every single log entry as well as the total for the selected period

zappi 2 - Firmware Version 2.142/2.143


The individual logs are summarised by the stop date.  The start and stop date and time are now shown on each log entry


Chargelogs2 Start:  When the EV first starts drawing power (note this may not be the same as the time when the EV was plugged in)

Stop:  When the EV stopped drawing power, or the EV was unplugged



Known Issues

The following known issues remain to be fixed:

– 3 phase zappi, built in CT’s not interpreted correctly in the app, resulting in a third of the power being reported
– 3 phase zappi, CT’s hardwired to zappi not shown correctly in app
– Tesla Model 3 – does not correctly work in ECO+. This will required a firmware update from Tesla