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🇸🇬 Solar Calculator Singapore

Enter your monthly SP Group bill and property type — get solar system size, SolarNova HDB programme guidance, landed property net metering at retail rate, and payback period for Singapore's tropical conditions.

Your electricity details
S$SGD
Solar system results — Singapore
10 kWp system — 1256 kWh/kWp/yr
Monthly kWh usage606 kWh/mo
Annual solar production12,556 kWh/yr
Self-consumption savingsS$2,279/yr
Net metering credit (retail rate)S$1,865/yr
Total annual benefitS$4,143/yr
System cost rangeS$18,000 – S$25,000
Total installed cost (midpoint)S$21,500
Payback period5.2 years
25-year net savingsS$82,087
Singapore advantage: Near-equatorial location (1.3°N) means consistent year-round solar production with no seasonal dip. Singapore produces approximately 1,200–1,300 kWh/kWp/yr — similar to northern Australia. The stable tropical climate (minimal cloud seasonality) makes solar production highly predictable compared to temperate countries.
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How to Use This Calculator

Enter your monthly bill and area

Enter your average monthly SP Group electricity bill in Singapore dollars (SGD). Select your area — Singapore is a small island (50km wide) with very uniform solar radiation across all regions. East and West (4.3 PSH) are marginally sunnier than Central, North, and Northeast (4.2 PSH). All areas have excellent tropical solar resources consistent throughout the year.

Property type matters most in Singapore

In Singapore, only landed properties (terrace houses, semi-detached, bungalows) and commercial buildings with owned rooftops can typically install and own private solar panels. HDB flat residents participate in the SolarNova programme — but do not own the panels. Condo unit owners face MCST approval requirements for shared rooftop use. Select your property type to get the relevant calculation or explanation.

Singapore net metering for landed properties

Landed property and commercial solar owners in Singapore can export surplus electricity to the grid through SP Group, receiving credits at the retail tariff rate (~S$0.33/kWh). This makes the economics straightforward — both self-consumed and exported electricity earn the same value. Apply for a Solar Generation Facility connection through SP Group's online portal.

The Formula

Monthly kWh = Monthly Bill ÷ S$0.33/kWh (SP Group retail tariff 2026) Annual production = kWp × PSH × 365 × 0.80 efficiency Self-consumption = Annual kWh × 55% (consistent year-round SG) Self-consumption savings = Self-consumed kWh × S$0.33/kWh retail Net metering credit = Exported kWh × S$0.33/kWh retail System cost = kWp × S$1,800–2,500/kWp (SG installed cost 2026) Payback = Total cost ÷ Annual benefit (typically 7–9 years) Note: Only applies to landed properties and commercial buildings

Singapore's solar regulatory framework is governed by the Energy Market Authority (EMA). The Enhanced Central Intermediary Scheme (ECIS) facilitates solar exports for non-contestable consumers. EMA's SolarNova programme targets 1.5 GWp by 2025 through HDB and government building installations. The Sustainable Singapore Blueprint sets national renewable energy targets. Net metering applications go through SP Group (spgroup.com.sg/solar).

Example

David — West Singapore landed property, 10kWp semi-detached

David pays S$200/month for his semi-detached house in the West. He installs a 10kWp system on the south-facing section of his dual-pitched roof.

Monthly billS$200
Area / PSHWest, 4.3 PSH
System size10 kWp
Property typeLanded (semi-D)

Result

Annual production~12,556 kWh/yr
Production per kWp~1,256 kWh/kWp/yr
Self-consumption savings~S$2,275/yr
Net metering credit~S$1,861/yr
Total annual benefit~S$4,136/yr
System cost~S$21,500
Payback~5.2 years
25-year net savings~S$81,900

Singapore's near-equatorial location (1.3°N) provides consistent year-round solar production — no seasonal dip as seen in temperate countries. The West region's 4.3 PSH and the high retail tariff (S$0.33/kWh) combine to make this one of the fastest solar payback scenarios in Asia. The 10kWp system on a semi-D roof is well-sized relative to typical consumption of ~600 kWh/month for air-conditioned Singapore homes.

FAQ

HDB flat residents cannot individually install solar panels on their own rooftop — the rooftop is common property of the HDB block. Instead, the SolarNova programme (led by HDB and EMA) installs solar panels on HDB blocks through aggregated tenders awarded to solar companies. The solar company operates the system, and the electricity generated offsets HDB common services (corridor lights, lifts). Residents do not receive individual solar credits, but may see reduced service and conservancy charges over time. As of 2024, over 5,500 HDB blocks have solar panels under SolarNova.
SolarNova is Singapore's flagship solar programme, launched by the Housing Development Board (HDB) and Energy Market Authority (EMA) in 2014. It aggregates solar demand across government buildings and HDB blocks to create large-scale installations. Solar companies lease the rooftop space, install and maintain panels, and supply electricity to HDB at reduced rates. The programme aims to make Singapore a "City in a Garden" with solar as a key energy source. Singapore targets 2 GWp of solar by 2030 under the Singapore Green Plan 2030.
Landed property owners can sell surplus solar electricity to the grid through SP Group's Enhanced Central Intermediary Scheme (ECIS). The process: install panels with a qualified contractor, apply for a Solar Generation Facility (SGF) connection through SP Group (spgroup.com.sg), have a bidirectional smart meter installed, and receive credits at the prevailing retail tariff rate on your monthly bill. The application process typically takes 2–3 months. There is no minimum or maximum system size requirement for landed homes, but SP Group approval is required.
Yes — Singapore's tropical location (1.3°N) provides year-round consistent solar production of approximately 1,200–1,300 kWh/kWp/yr. Combined with the relatively high SP Group retail tariff (~S$0.33/kWh) and net metering at retail rate, payback for landed properties is typically 7–9 years. The equatorial climate means no seasonal dip — unlike European countries where winter production can be 4–5x lower than summer. Singapore solar systems are among the most predictable and consistent globally.
Individual condo unit owners typically cannot install solar on shared rooftop space without Management Corporation Strata Title (MCST) approval, as the rooftop is common property. However, an entire condominium development can install a communal solar system if the MCST votes to approve it. The MCST would contract with a solar company, and electricity savings would be allocated across units — typically reducing MCST fees. Some newer condominiums include solar as part of their green building certification. Contact your MCST or engage a solar consultant to assess feasibility.

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