How Much Does EV Charger Installation Cost in Hong Kong?

It depends on the car park's ownership structure. If the car park space is privately owned (registered under the owner's or a company's name), the owner generally has the right to install a charger, but must notify the building management and relevant facilities management company, and ensure that cable routing does not pass through common areas. If the car park is a building common facility managed under the deed of mutual covenant (DMC) by the Owners' Corporation (OC), written OC approval is required and a registered electrical contractor may need to be appointed. Always check with your building management before commissioning work to avoid disputes.

A 7kW single-phase charger (Mode 3 AC) is the most common choice for Hong Kong residential use. Based on typical EV battery capacities, a 7kW charger can fully charge a battery in 6–10 hours, making it well-suited for overnight charging. Installation requirements are comparatively straightforward, as existing residential power supply (single-phase 220V) typically supports 7kW without a three-phase supply application. A 22kW three-phase charger charges three times faster than 7kW but requires a three-phase power supply, which must be applied for through CLP or HKE — a process that takes longer and costs more. The 22kW option is generally only suitable for users with specific requirements such as commercial vehicles or multi-car households. Most Hong Kong residential users choose 7kW, which is sufficient for daily use when paired with a smart load management system.

不一定，但需由持牌電業工程師（REW）評估現有電錶板容量。若現有電錶板為舊式ELCB型號、電路已接近滿負荷，或計劃安裝7kW以上充電器，一般建議升級至RCBO電錶板並新增30A專用電路。電錶板升級費用約HK$3,000至HK$10,000，視乎電路數目及板型而定。建議在安裝EV充電器前先進行電力評估，若同步進行電錶板升級，合併施工可節省整體成本，避免兩次開工費用。

EV充電器安裝費用主要受以下因素影響：充電器功率（7kW或22kW）及品牌；車位至電源距離及電纜走線長度；是否需要穿牆、加設線槽或其他走線工程；現有電錶板容量是否足夠，或需同步升級；是否需要加裝智能負載均衡裝置（適合多個車位分享電源）；以及是否需要向中電或港燈申請增容或三相電供應。建議向最少三間持牌電業承辦商索取報價，確認報價包含WR1竣工申報及接地測試，並查詢是否包含充電器品牌保養服務。