That percentage of total usage is tiny, I agree.

We have one car and charge it quite often.

I just checked last month: 184kwh went into the Leaf. We used 557kwh in total (excluding the car charging).

We generated 1170kwh.

The key thing for me is the wild energy usage from the house. It’s a lot.

Edit: Your car energy usage calculation works out awfully close to what we use.