In response, new-energy proponents say the facilities should built in residential communities, but Xu said that also faces challenges.

"For one thing, (an additional heavy) load on the community electric network is a big problem," he said.

"Also standards for charging equipment and vehicles are not unified. Different brands may have different specifications. The industry has had different voices on this for a long time."

Strong support

Despite the practical difficulties, both automakers and policymakers are giving strong support to new-energy vehicles.

Xu said delegates to the National People's Congress in March agreed that electric vehicles are a major solution to the current environmental problems in Beijing and other big cities.

The Beijing government recently drafted a new policy to support new-energy vehicles that exempts electric cars from the license plate lottery and offers a combined subsidy of up to 120,000 yuan ($19,308) from the central and municipal governments, said Chen Guiru, deputy director of Beijing New-Energy Vehicle Development Promotion Center.

He said detailed implementation measures for the new policy will be released in May.

Similar incentives were adopted by the Shanghai municipal government at the end of last year. The government will give a subsidy of up to 30,000 yuan for each plug-in hybrid and up to 40,000 yuan for a privately owned pure electric vehicle.

Last July, the local governments of Shenzhen and Hefei both began policies to support new-energy vehicles.

Statistics from the Ministry of Science and Technology showed that 25 pilot cities for new-energy vehicles now have 27,400 on the road, but 23,000 are used for public services including buses and taxis.

The central government has set a goal of 500,000 new energy vehicles sold by 2015. To meet the target, another 470,000 would have to be sold in less than three years.