The Subaru G4e is a concept electric car developed by Japanese automaker Subaru in conjunction with Tokyo utility TEPCO as a possible successor to the R1e. It was unveiled at the 2007 Tokyo Motor Show.^[1]

The G4e name is intended to stand for "Green for the Earth."^[2] The car seats five and has a wedge design with a low 0.276 drag coefficient, aided by the deletion of wing mirrors in favor of a-pillar mounted rearview cameras.^[2] Batteries are stored under the floor to maximize passenger space.^[1][3] The interior is trimmed in red and white, with a dashboard incorporating a large video screen in the center stack intended to be reminiscent of a waterfall.^[4]

It has a range of 200 kilometres (120 mi) and can be fully charged in about eight hours from a home AC power source. A quick charge to 80 per cent of the batteries' capacity is possible in just 15 minutes.^[2][5]

The G4e uses a lithium-ion battery developed exclusively by Subaru which employs vanadium technology to allow the battery to store two to three times more lithium ions than conventional lithium-ion batteries.^[2][6] The car's battery pack provides 346 volts.^[1]