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🇹🇷 Solar Calculator Hong Kong

Enter your monthly electricity bill and district — get solar system size, FiT income at HKD $3–5/kWh from CLP or HK Electric, self-consumption savings, and payback period.

Your electricity details
$HKD
Solar system results — Hong Kong
5 kWp system — 1168 kWh/kWp/yr
FiT at $5/kWh — small system premium rate!
Monthly kWh usage615 kWh/mo
Annual solar production5,840 kWh/yr
Self-consumption savings$ 3,037/yr
FiT income ($5/kWh)$ 17,520/yr
Total annual benefit (HKD)$ 20,557/yr
System cost range (HKD)$ 60,000 – $ 100,000
System cost range (USD approx.)US$ 7692 – US$ 12821
Payback period3.9 years
25-year net savings (HKD)$ 433,920
FiT application required: Apply to CLP or HK Electric before installation. Both utilities have different application processes. HK Electric serves HK Island; CLP serves Kowloon, NT, and Outlying Islands. The scheme pays guaranteed FiT rates for 10 years from connection. You must be an existing customer with a standard tariff connection.
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How to Use This Calculator

Enter your monthly bill and district

Enter your monthly electricity bill in Hong Kong Dollars from CLP (Castle Peak Power) or HK Electric (HKE). HK Electric serves Hong Kong Island; CLP serves Kowloon, the New Territories, and Outlying Islands. The blended retail tariff is approximately HKD $1.30/kWh in 2026. Select your district — New Territories North and Outlying Islands (4.0 PSH) are slightly sunnier than urban areas, with lower shading from dense buildings. All HK locations have significantly better solar resources than most of Europe.

Set system size and FiT scheme

Enable the FiT (Feed-in Tariff) scheme if you plan to apply to your utility. This is highly recommended — FiT rates of HKD $3–5/kWh for exported electricity are 2–4x the retail import rate, dramatically improving payback. Systems up to 10kWp receive the higher rate ($5/kWh for HKE, $4/kWh for CLP); systems above 10kWp receive $3/kWh. For NT village houses (丁屋) and Outlying Islands properties with ground space, 5–10kWp systems maximizing the FiT premium rate are optimal.

FiT application — do this first

Apply to your utility company before signing any installation contract. CLP and HKE both have online FiT application portals. The process includes a technical feasibility check, meter upgrade to bidirectional, and connection agreement. Processing typically takes 4–12 weeks. The FiT scheme runs until at least 2033, providing income certainty for the 10-year tariff period.

The Formula

Monthly kWh = Monthly Bill ÷ HKD $1.30/kWh (blended retail) Annual production = kWp × PSH × 365 × 0.80 efficiency Self-consumption = Annual kWh × 40% Self-consumption savings = Self-consumed kWh × HKD $1.30/kWh FiT income (≤10kWp) = Exported kWh × HKD $5/kWh (HKE) or $4 (CLP) FiT income (>10kWp) = Exported kWh × HKD $3/kWh System cost = kWp × HKD $12,000–20,000/kWp Payback = Total cost ÷ Annual benefit (4–6 years with FiT) USD approx. = HKD amount ÷ 7.8 (pegged exchange rate)

Hong Kong's FiT scheme is governed by the Code of Practice for Grid Connection of Renewable Energy Systems issued by the Electrical and Mechanical Services Department (EMSD). Both CLP and HKE operate the scheme under agreements with the government. The scheme was introduced in 2018 and the tariff rates are guaranteed for 10 years from the date of connection for each installation. Hong Kong's Climate Action Plan 2050 targets net-zero emissions by 2050, with rooftop solar identified as a key contributor to meeting interim 2035 targets.

Example

Chan family — NT village house, 5kWp with CLP FiT

The Chan family owns a 丁屋 (village house) in the New Territories with a flat rooftop. Monthly electricity bill: HKD $800. They apply for CLP FiT before installation.

Monthly billHKD $800
District / PSHNT North, 4.0 PSH
System size5 kWp
FiT schemeYes — CLP ($4/kWh)

Result

Annual production~5,840 kWh/yr
Production per kWp~1,168 kWh/kWp/yr
Self-consumption savings~HKD $3,036/yr
FiT income ($4/kWh CLP, 5kWp)~HKD $14,042/yr
Total annual benefit~HKD $17,078/yr
System cost rangeHKD $60,000–100,000
Payback~4.7 years
25-year net savings~HKD $347,000

The generous CLP/HKE FiT rates make solar highly attractive for NT village houses with suitable roof space. Note: FiT income of HKD $14,042/yr significantly exceeds the self-consumption savings of $3,036/yr — the FiT export premium is the primary economic driver for small HK solar systems. After the 10-year FiT period, ongoing self-consumption savings of ~$3,000/yr continue for the panel's 25-year lifespan.

FAQ

Apply to your utility before signing any installation contract: (1) Submit an online FiT application to CLP (clp.com.hk/fit) or HK Electric (hkelectric.com/fit). (2) The utility conducts a technical feasibility assessment of your connection point. (3) If approved, sign a FiT Connection Agreement and Grid Connection Agreement. (4) Hire a Registered Electrical Contractor (REC) to install the system. (5) Notify the utility after installation for meter upgrade — they install a bidirectional meter at no charge. (6) FiT payments begin from the date of grid connection. The entire process from application to connection takes approximately 3–6 months.
Both CLP and HK Electric offer tiered FiT rates based on system size. For systems ≤10kWp: CLP pays HKD $4/kWh; HK Electric pays HKD $5/kWh. For systems >10kWp up to maximum capacity: both pay HKD $3/kWh. HK Electric serves Hong Kong Island only — all other areas (Kowloon, New Territories, Lantau, Outlying Islands) are served by CLP. If you are on HK Island with a small residential system, HKE's $5/kWh rate is particularly attractive. Note: retail tariff rates differ between the two utilities — ensure you compare total system economics against your actual utility.
The most suitable properties for solar in Hong Kong: (1) NT village houses (丁屋) — flat concrete rooftops with minimal shading, ground-level or roof access. (2) Outlying Islands homes — Lantau, Lamma, Cheung Chau have excellent sun exposure and good roof space. (3) Industrial buildings — large flat rooftops in Kwun Tong, Tsuen Wan, Tuen Mun ideal for 50–200kWp systems. (4) Commercial buildings — podium rooftops and carpark roofs in urban areas. High-rise residential apartments in Kowloon and HK Island face shading challenges and Owners' Corporation approval requirements, making solar difficult for most flats.
Yes — Hong Kong is in an active typhoon zone, with Signal 8+ typhoons occurring several times per decade. Solar panels must be installed to withstand sustained winds of 220km/h+ per the Hong Kong Wind Code. In practice, reputable installers use mounting systems rated for Hong Kong's wind loading requirements. Ballasted (non-penetrating) systems used on flat roofs must meet specific ballast calculations. Properly installed panels have an excellent track record in typhoon-affected areas — the panels themselves are glass-reinforced and robust; the mounting is the critical factor. Ensure your installer provides a wind load compliance certificate.
For individual apartments in high-rise blocks: challenging. Rooftop solar typically belongs to the Owners' Corporation (業主立案法團) and requires a majority vote and common area approval. For entire buildings: commercial or residential building solar is possible with OC agreement, with costs and FiT income shared proportionally. For low-rise properties and villas on HK Island: excellent, especially with HKE's $5/kWh FiT rate and 5.8 PSH irradiance on south-facing slopes. The Peak, Repulse Bay, and Pokfulam areas have properties well-suited to solar due to south-facing orientation and lower shading from neighboring buildings.

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