It is not a total easy calculation for sure, but as I remember even when you calculate actual German electricity mix you are allready better than Diesel, but there are for sure sources saying the opposite, but it is always good to have a check which one is more reliable. If you want I can try to find a good one actually not to much into it.
Just in short about German electricity mix:
https://www.solarify.eu/2020/01/04/740- ... 6-prozent/
In 2019 46% of the electricity was produced by all ecological sources (water, wind, solar, biomass) which is first time more than by coal and so
there was also a good success to lower Germans CO2 output by now 35% for 2019 compared to 1990, but we are going to miss the 2020 goal for 40% for sure.
And also the named numbers haven't been success of German government but of the European CO2 Certification system where a ton actually costs around 25 € which is still about 7 times to low compared to the calculated damages CO2 causes but already high enough to push out coal just by its price. Funny story to add: not just in Australia but even in Europe Coal mines start to build PV plants for their electricity demands as the only solution to produce cheaper ... using their own by coal produced electricity just starts to be to expensive for them ... Now you can choose if you prefer to cry or to laugh, I am not sure myself.
If you like to see numbers your self, this is an interactiv tool which you can deeply see into all values from the past, from one of Germans most trustable institute:
But for sure you are cleaner when you mainly can use your local PV plant on your roof to charge your car, or even better the PV plant integrated into your cars roof.
The elongated https://sonomotors.com campaign is actually at its 38th of 50 days at 44 Mio of 50 Mio € to be collected, so doesn't sound bad at the moment.
And if not seen yet, if go into higher risk when making a reservation and not just spending 500 but round about 9000 € you will become part of the ownership of sonomotors or at least get profit share ... the day they start to make profit ... well could take a few more years, so don't ask every day for your profit