Since medium charging is an economi

Since medium charging is an economically-viable solution that improves charging efficiency and is desirable for large-scale implementation, the industry should focus on installing more medium chargers in both public and private car parks. The need for quick chargers should not be neglected, since they can top-up e-PC batteries in a short time, helping e-PC drivers complete their journeys when necessary. However, quick chargers have various incompatible charging standards and utilise unique charging sockets. Multi-standard chargers can thus balance the benefits among EV users in Hong Kong, since at present, this is the only solution that allows e-PCs from the U.S., Japan and Europe to be recharged. In future, the harmonisation of standards should be closely monitored. It is important to note that installing quick chargers requires a high power capacity, and thus these chargers are more suitable for supplementary top-up use in times of occasional need, rather than for large-scale deployment. Paid charging services are gaining acceptance from e-PC users. 2015 study conducted in the U.S. shows that the imposition of a price did not eliminate consumer demand for charging. Evidence also shows that a European charging service provider achieved break-even on two charging stations after a few years of operation. The continuous revenues generated illustrate that e-PC users are not particularly reluctant to pay for charging services. Paid charging services also discourage the unnecessary occupation of parking spaces with EV charging facilities, thus helping e-PC users with a real need to use the facilities. This “user pays” principle should facilitate the recovery of operating and maintenance costs, and help private companies develop a sustainable business model