Germany’s automotive industry association VDA (Verband der Automobilindustrie) has proposed an unconventional approach to keep plug-in hybrids (PHEVs) relevant after 2035, when the European Union plans to allow only zero-emission vehicles. The association suggests introducing a mandatory charging system that would restrict combustion engine performance if the vehicle is not regularly charged.
VDA President Hildegard Müller told Frankfurter Allgemeine Sonntagszeitung that the proposal is intended to “motivate PHEV drivers to drive electric more often,” thereby ensuring the vehicles deliver real-world environmental benefits.
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Under the plan, drivers would be required to recharge within a certain distance range. If they fail to do so, the vehicle’s engine output would be limited automatically, encouraging more frequent electric-only operation.
The initiative comes amid growing criticism that plug-in hybrids emit more CO₂ in practice than official figures suggest. Studies by the International Council on Clean Transportation (ICCT) and Transport & Environment (T&E) have shown that many PHEV owners rarely charge their vehicles, using the combustion engine most of the time. While the VDA proposal could help close this gap, its effectiveness would depend on how the charging intervals are defined.
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If set too long, the impact on emissions may be minimal. If too short, it could inconvenience drivers—particularly on long-distance trips—and put additional strain on charging infrastructure. The debate highlights a key challenge for Europe’s automotive transition: balancing technological flexibility with genuine emission reductions as the market shifts toward fully electric vehicles.