Singapore Solar & Battery Payback Calculator
Estimate your savings and payback using the current SP Group tariff and published Singapore wholesale market data.
Your estimate
Current annual bill (no solar)
S$0
Annual savings — solar only
S$0
Annual savings — solar + battery
S$0
Estimated payback period
– yrs
Scenario comparison
Assumptions used
- SP Group regulated tariff, Q3 2026: 34.78 cents/kWh all-in with 9% GST (31.91 cents before GST).
- Solar-only systems are assumed to offset ~70% of household consumption; solar + battery systems ~90%, based on typical Sunollo fleet sizing.
- Surplus solar not used immediately is credited under the Simplified Credit Treatment (SCT) at roughly 25–26 cents/kWh — a battery lets you use more of that energy yourself instead of exporting it.
- Singapore's solar export window (10am–4pm) has averaged ~S$147/MWh on the wholesale market versus ~S$185/MWh in the evening peak (7–11pm) — a ~26% gap that a battery captures by shifting stored solar into the evening.
- System and battery costs are estimated from Sunollo's published pricing: packages from an S$14,500 floor, S$1,000–S$1,200 per kWp for larger systems, and battery add-ons of S$8,000–S$20,000 for 5–20 kWh.
Estimates based on Q3 2026 SP Group tariff (34.78 cents/kWh with GST) and Sunollo's published NEMS wholesale market analysis. For a precise quote based on your actual roof and consumption, get a free assessment.
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