Solar power & backup power installation

Solar and backup power installation in Hong Kong: quotes and approvals

Updated 4 November 2026

A home solar system in Hong Kong costs about HK$40,000 to HK$60,000 for a 2 kW rooftop set, and HK$80,000 to over HK$200,000 for 5 to 10 kW, approximately, according to sellers' websites in November 2026. Battery backup adds to the price, and the total depends on the roof and the system's size. A request with your roof and supply details gets quotes that fit your building, which is the quickest way to compare offers.

What the price depends on

• panel capacity in kW, and the size and angle of the roof
• the inverter brand and the mounting system
• shade from neighbouring buildings and access to the roof
• battery capacity in kWh, if you want backup power
• the number of phases in your supply
• your deadline and budget

Installers quote per system after a survey, in HK$. A university study of solar power in Hong Kong estimates payback at around two to three years, but that depends on the system and the tariff, so ask for the figures in the quote.

Rules and approvals

Government guidance on renewable energy systems says an application needs the design, technical specifications, operation procedure, testing and cost data of the system, so ask your installer to prepare them. Solar panels should generally go on a structurally sound roof or in an open area that is unshaded. Feed-in tariff rates are set by the government and revised, so ask which rate applies to your system and check the current figure before you sign.

Season and roof work

Winter, from December to February, is cooler and more comfortable for working on a roof. Summer, from June to August, is hot and humid, and crews often start early in the morning. Plan the installation outside the hottest weeks if you can, and ask how the installer keeps the roof dry while the work is in progress.

What to put in the request

Say whether you want solar only or solar with battery backup, and give the power in kW and the battery capacity in kWh if you know it. Add whether the roof is flat or sloped, whether neighbouring buildings shade it, the number of phases on your supply, the site address in Central, Kowloon, Sha Tin, Tsuen Wan or Tuen Mun, your deadline and your budget in HK$. Photos of the roof help an installer give a first estimate.

On BlaBlaPrice the request is free for buyers. Describe the system in your own words in a chat, add a photo if you like, and BlaBlaPrice's AI asks for missing details, looks through local price lists and shows the prices and businesses it found. Registered sellers reply in the chat with their own offer, terms and delivery, and your contact details stay hidden until you choose whom to contact. Related work is in electrical installation and construction and renovation.