Is solar worth it for a landed home in Singapore?
For most landed homes with usable roof area and daytime power consumption, yes. Singapore averages 4.5 peak sun hours a day, so a 10–15 kWp system on a typical landed roof generates 12,000–18,000 kWh a year. With self-consumption at SP residential rates and the rest exported to the grid under SLEP, payback usually lands between 6 and 9 years on a system warranted for 25–30 years. The variable that ruins payback is shading from neighbouring rebuilds — that is the part the calculator cannot see and we check on site.
How many solar panels can fit on a Singapore landed home roof?
Typical Singapore landed roofs fit between 14 and 36 panels depending on plot size, roof pitch, and obstructions like skylights, water tanks, and parapet setbacks. We install 650W bifacial panels (Trina Vertex N) — the newest generation available, delivering far more power than standard 400W panels from the same roof space. When roof area is the constraint, which it almost always is on landed homes, that difference decides whether solar is worth doing at all.
What is the payback period for solar on a landed home in Singapore?
For a Singapore landed home, payback is typically 6–9 years for a properly sized system. The exact number depends on three things: how much power you use during the day (self-consumed kWh is worth ~30 cents, exported is worth ~10–15 cents), your roof orientation, and shading. Our calculator runs both standard and performance-tier economics so you see the realistic range, not a marketing number.
Do I need to reinforce my landed home roof for solar panels?
Sometimes, yes. Each 650W bifacial panel weighs about 33kg, plus mounting rails. A 20-panel system adds roughly 700–900kg distributed across the roof. Reinforced concrete roofs on landed homes built after the 1990s are usually fine. Older clay-tile or lightweight metal roofs often need structural review — and that is where pure solar vendors miss things. As a BCA General Builder, we assess the structure before quoting panels.
Can I sell excess solar power back to the grid in Singapore?
Yes. Singapore landed homes can register under the Simplified Credit Treatment (SCT) for systems below 1 MWac, exporting excess power to SP Group at a regulated rate (currently around 10–15 cents per kWh, varies quarterly). Larger systems use the SLEP framework. We handle the EMA and SP Group registration as part of the install.
How long do solar panels last in Singapore's climate?
Quality panels carry a 25–30 year power warranty, guaranteeing ~85–87% of original output at end of warranty. Our Trina panels carry a 12-year product warranty and 30-year power warranty to 87.4%. Singapore's heat does accelerate degradation slightly compared to temperate climates, which is why we use the Trina N-type bifacial spec — it degrades at 0.4% a year instead of the industry-typical 0.5–0.6%.
