Renault Electric Kangoo Can Do

This report covers our first five months and 10,000 miles of service.

First, let me describe the range extender. It is a small petrol engine (with catalyst) that produces approximately 10 KW electrical at a fixed number of revolutions. While this doesn't seem like a lot of power, with practice it is possible to drive the Kangoo on the 10kW output of the engine alone, minimizing the power drain on the battery. The tiny nine liter fuel tank is sufficient to take the car 200 km. The driver can select whether or not to use the range extender, a feature not offered any production electric vehicle. However, it's not possible to recharge the vehicle while its standing still using the RE engine.

The big advantage of the RE option is that it reduces the stress of the novice electric vehicle drivers who worry about running out of battery power. Although a warning light will come on when the pack reaches 10 percent SOC (state-of-charge), we've found that it is rarely needed in daily operation where most of our trips are between 60-80 km, well within the range of the battery-only mode. With careful driving, the Kangoo will consume only 25kWh/100km. Digital displays indicate remaining kilometers available at present power levels, as well as showing current consumption in kW/100kM.

That being said, if you choose to run the RE engine all the time, the fuel economy drops to a disappointing 7liters/100km. However, we have found that we need to use it only 10% of the time in which case economy improves to a much more responsible 3liters/100km.

One of the benefits of the RE engine is that it can be used to supplement the Kangoo's electric heat in winter. A nice feature is the ability to program the car to preheat during the winter, as long as it is plugged in. The on board 3.5kW charger enables the car to recharge from 0 to 95% SOC in just 4 hours. The charger also has a 2kW charge mode for smaller 10 amp circuits, however charging takes appreciably longer. [Note: normal household currents in Europe are 220 volts at 50 cycles compared to 120 volts at 60 cycles (Herz) in North America.] Renault has incorporated a "drive-off protection" system that prevents the car from moving while it is still plugged into the charger.

The first surprise after taking delivery from the Renault dealer in St-Louis is the speed of the RH model. The vehicle will do 120km/hr, nearly 20km/hr above the advertised speed in the dealer brochure, in part because of an "overdrive" system that aids acceleration and driving in snow, something we know a lot about here in Switzerland. In fact, it seems there are so many added features in this vehicle, that it appears that Renault technicians inserted more than their sales staff realized.

As would be expected, the Kangoo makes use of regenerative braking (Rekuperation) to help recapture some of the vehicle's kinetic energy, which is used to recharge the air-cooled, NiCad batteries. Despite the deadly heat wave of the summer of the 2003 in Europe, the car performed well. However, the batteries must be periodically watered every 5,000 kilometers. A warning light will come on saying it is time to refill the batteries and remain on until the car is taken into the dealership.

The Kangoo EV drives much like a car with an automatic transmission. Remove your foot from the brake and the car will begin to roll forward. Having driven electric cars for many years, it was a pleasure to find a highly-effective park gear. In most EVs you have to rely on the emergency brake only when parking on a steep inclines. I also enjoy being able to put the car in Neutral to bypass engagement of the regenerative braking system on easy downward gradients.

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