Volkswagen's record-run ID. Buzz came home with 95.75 percent battery health

The 95.75 percent comes apart into something an operator can put in a spreadsheet. Over 99,767 km the van gave up 4.25 points of measured state of health ^[15], which works out to 0.0426 points per 1,000 km ^[16]. Run that straight out and 20 points of loss lands near 470,000 km ^[17]. Nobody should buy on that line. Degradation depends on temperature, charging behaviour, power levels and usage patterns, and this was one vehicle ^[10].

Cycles are the more useful denominator. The TUV Nord reading is indexed to more than 300 charging cycles as well as the distance ^[5][9], and at 300 cycles the van added about 333 km per cycle ^[18]. It averaged roughly 224 km a day across the 445 days ^[19]. A parcel van that plugs in every night after a short multi-drop round collects cycles far faster per kilometre than that, and the measurement was taken against cycles, not months. Before anyone quotes 95.75 percent in a residual-value paper, the number to look at is annual kilometres divided by average kilometres per charge, set against 333.

Access is the other half of the record. In parts of Africa, including Zambia and Tanzania, the team charged at national substations under supervision ^[11]. Rainer Zietlow said some regions offered few conventional charging options, and he named South Africa, Morocco and Rwanda among the better-served countries, noted rapid growth in Saudi Arabia, pointed to Brazil and Chile in South America and to China for the scale of adoption ^[13][12].

The van kept its standard-production Giti tires for the whole attempt ^[7], and TUV Nord had inspected the same vehicle before it left, so the before-and-after belongs to one identified production van ^[9]. Volkswagen and Zietlow say it finished without a technical breakdown ^[8]. Interesting Engineering notes the run was a single vehicle and not a controlled durability test of the ID. Buzz fleet ^[8].

That gives a buyer two questions to sort their own routes on: how close the duty cycle sits to 333 km per charge, and whether the worst route on the roster has public charging at all. A fleet whose duty cycle sits near 333 km per charge can treat 95.75 percent as a plausible planning assumption for its own mileage, with the temperature caveat attached ^[10]. A fleet running routes through thin-charging regions is up against the charging network instead, and Interesting Engineering's own conclusion is that charging availability remains one of the biggest variables in global electric travel, more than vehicle range ^[20]. For Zietlow the trip was the biggest project of a 20-year career ^[14].