Time for the long run test!
I intend to test while driving back and forth to work, over a period with different weather conditions. Each day I travel approximately 90 kilometer to work and 90 kilometer back home. This means I do not expect the battery charge to last the whole journey, I know now that it will be empty after 50 kilometer (that I will also test).
My journey is a mixture of country roads and highways.
Driving style:
When driving on country roads I have an average maximum speed of 70 km per hour, and when driving on highway I maximize at 90 km per hour

Tomorrow I will do a “reference driving” – that is I will drive back and forth with the same driving style with “normal” Prius conditions – that is I will not charge the extra battery, so I can see what consumption “is normal”.