Commercial systems require panel cleaning every 3–6 months (Singapore's urban dust and tropical conditions reduce output by 5–15% without cleaning), quarterly electrical inspections, annual inverter diagnostics, and thermal imaging scans. Inverters typically require replacement every 10–15 years. Rezeca offers comprehensive commercial maintenance packages including real-time monitoring, quarterly performance reporting, and priority response. Annual costs typically run 1.0–1.5% of original system cost.

Physical installation takes 1–4 weeks depending on system size. Full timeline from consultation to commissioning is 8–16 weeks: site assessment and engineering design (2–3 weeks), regulatory approvals (4–8 weeks), physical installation (1–4 weeks), and commissioning and grid connection (1–2 weeks). Rezeca coordinates all phases and schedules work around your business operations.

Yes. Commercial installations generate I-REC certificates — one per MWh of electricity produced. These can be traded on certified platforms or used for corporate sustainability reporting. A 200 kWp system generating approximately 260 MWh annually would earn around 260 I-RECs per year. Rezeca provides full REC management — handling registration, tracking, and submission.

Most commercial building types in Singapore are suitable: offices, warehouses and logistics facilities, retail buildings, factories, schools and institutions, hotels, healthcare facilities, places of worship, and mixed-use developments. Metal roofs (standing seam and trapezoidal) are ideal — they don't require drilling, reducing cost and waterproofing risks. RC flat roofs are also highly suitable with ballasted or anchor-mounted systems. Rezeca conducts a structural assessment for every project.

Commercial installations require approvals from: (1) SP Group for grid connection and bi-directional meter, (2) EMA for electrical installation licence — required for non-residential installations with demand exceeding 45 kVA, (3) BCA for structural assessment of roof loading capacity, (4) URA for planning permission where applicable, and (5) SCDF for fire safety on certain building types. All work must be carried out by an LEW with a QP for structural endorsement. Rezeca manages all submissions — typical approval timeline is 4–8 weeks.

Yes. Commercial solar installations can export surplus electricity to SP Group. Systems under 1 MWac can use the Simplified Credit Treatment (SCT) or Enhanced Central Intermediary Scheme, while larger systems may register as Market Participants. Export credits appear as reductions on your monthly SP Group bill. A bi-directional smart meter is installed during commissioning. Rezeca advises on the optimal scheme for each project.

Most commercial solar installations achieve payback in 2–4 years as of 2026. After payback, systems generate free electricity for the remaining 21–23 years of the 25-year system lifespan. Commercial panels carry a 12-year product warranty. Key variables include self-consumption rate (electricity used on-site saves S$0.2911/kWh vs export at S$0.2046/kWh), system size, and roof type. Businesses with high daytime electricity demand see the fastest returns.