Exemption congestion zone

All purely electric cars, vans and other vehicles are currently Congestion Charge-exempt, because they have zero tailpipe emissions. This means if you purchase a fully electric vehicle, you won’t have to pay the London Congestion Charge. Examples of fully electric cars are the Renault ZOE, Nissan Leaf and Volkswagen e-Golf.
Plug-in hybrid-electric vehicles (PHEVs) are also Congestion Charge exempt, as none currently on sale exceeds the 75g/km limit. So the likes of the Hyundai Ioniq Plug-In, Mitsubishi Outlander PHEV and Kia Niro PHEV are all exempt from the charge as well.
Larger wheels increase tailpipe emissions, and individual options and trim levels are taken into account when working out Congestion Charge exemption. In some cases, these could push a PHEV over the limit.
Hybrid cars aren't automatically Congestion Charge exempt. It depends on the model and trim level in question.