How are we driving? 🚗

Last updated on April 24th, 2026

End of October 2025 we bought our first electric vehicle to utilize the generated electricity a bit more and being more independent from fossil fuel. For the 3 year old car, 38,000 km already driven, we payed 16k EUR. The car was planned to be our second small car for driving shorter distances to work etc., but we totally switched our 2nd car usage. The Mokka is used now most of the time and has soo many benefits.

• Opel Mokka-E (max. 310 km range, 50 kWh battery, 136 PS max.)
• 11 kW wallbox SMA eCharger (max. 22 kW, 3-phase)

Tips & Thoughts

• In Germany a new wallbox needs to be registered, because it can consume more than 4.2 kW. Means a Smart Meter Gateway is required and maybe also a new electricity box, which is most likely more expensive than just charging via normal power outlet.
• In Germany you can request a THG-Quote EVERY YEAR, means selling the CO2 you are not emitting. ~ 300 EUR in 2026
• In Germany you pay no vehicle tax for 10 years (max. till 2035 I think)
• Before buying a used car check the state of health of the battery. Ours had 93 % after 3 years.
• Charging the car is A LOT cheaper than fossil fuel, even when not using PV!

Numbers

I'm collecting some numbers and maybe its helpful for you. The costs are the costs of grid electricity consumption for the share of charging relative to the total house energy consumption, means charging via PV is free of charge.
For fossil-fuel car drivers I also calculated the equivalent costs per Liter for a car with 6.5 L / 100 km consumption.

Let's have a look into the months.
The costs are reduced significantly when sun is shining :)
But still in winter using the grid for charging, costs are much less than using fossil-fuel.