I believe that you need to put the SyncEV into BASIC mode and let the Tesla set the charge start time. This is the response I got from SyncEV, who I might say replied very quickly. My question related to the SncEV charger with my Smart Car. Note the SyncEV in BASIC mode performs I believe just like the Tesla charger. I am impressed with SyncEV and will try their recommendation in a few days, but their suggestion seems reasonable.
Thank you for your email.
The Sync EV along with many other EV Charging manufacturers uses pulse technology. The reason for this is most electric vehicles if not communicated with for around 5 mins they go into what is called "sleep" mode. The Sync Ev sends a small pulse of electricity every 2/3 minutes to keep the vehicle awake so that it will accept the full power charge at the start time requested.
We have a way to stop the pulsing, we do this by supplying the car with the minimum amount of charge the vehicle accepts until the start time requested. We can alter this remotely if requested.
Alternatively if your vehicle has the option to schedule a charge then this would prevent the use of any unwanted electricity use. The Sync EV unit is set to "Basic" in the advanced section of the settings. The vehicle then wakes itself up, then the Sync EV starts to charge.
We hope this information helps and if you have any further questions please do not hesitate to contact us
Kind regards
EV Team