TV spot for green electricity provider Ostrom Dieter, 70, e-taxi driver. The face of Ostrom's winning video.
15 seconds, cut from a real customer visit: Dieter explains why he makes money while charging his e-taxi. The spot ran on linear TV, and its cutdowns became the campaign's winning video online.
The most credible spot is a satisfied customer
Ostrom sells smart green electricity: dynamic rates, app control, NeoGrid AI. So for the TV spot, no model stood in front of the camera — instead, Dieter Sasse: 70, e-taxi driver from Berlin. Ostrom had searched for happy customers through an online call, and he applied.
His own words carry the 15 seconds. He used to be happy about a cheap gas station. Today he supports the energy transition and earns money while his taxi charges. That’s clever.
„ROCC turned our complex NeoGrid AI product into an easy-to-follow story with a real person. And the numbers came in 20% above our other video ads.“
Planned like a spot, shot like a visit
This spot was planned from the start as an authentic happy-customer portrait. We looked at references from the genre, sharpened the concept, and executed it exactly that way: shot at Dieter's home, in his real living room. RED Komodo, handheld camera, softly lit instead of high-key and polished. Advertising for an honest product shouldn't create distance, so the image breathes.
Two formats were planned above all: the TV spot and the testimonial. The shoot day gave us more to work with, so the walkthrough with Ostrom employee Rahel and the performance ads were added. One shoot day, four formats. That's how Ostrom gets maximum production value out of the budget.
The commercial ran on linear TV, and its cuts kept running online. As of May 2026, approved by Ostrom: the video view campaign with the Dieter and Rahel cuts from this shoot reached 101,035 views, with a 20 percent higher click-through rate than the video ads without ROCC material. A second campaign with the Dieter videos brought in 131 visits to the tariff page and 17 tariff sign-ups. For Monna Ruan, Senior Performance Marketing Manager at Ostrom, the Dieter cutdown was thus the campaign's winning video.
„Today I'm supporting the energy transition and earning money at the same time, just by charging my car. That's clever.“
Featured in the spot
Dieter talks in his living room, his e-taxi rolls through the Berlin neighborhood, the wallbox starts charging with NeoGrid AI, the app shows the charging stats. At the end, Dieter leans against his taxi, and the end card takes over: save up to 50 percent on charging costs.
01 · The e-taxi in close-up
02 · The wallbox kicks off: charging with NeoGrid AI
03 · Charging stats and credits in the Ostrom app
04 · The end card that closes out the TV spot
Part of a collaboration since 2024
Ostrom has trusted us with their video content since 2024: from the first commercials through explainer videos to this TV campaign. To see what the commercial campaign that started our collaboration looked like, check out our Case study on the Ostrom commercials.
The same shoot day also produced the Testimonial Video with Dieter: 85 seconds in which he explains NeoGrid AI in his own words.
What ROCC Film handled for Ostrom.
Ostrom found Dieter. We cut a spot from his everyday life that holds up on TV.
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