Singapore Residential Solar Savings Calculator
Estimate solar generation, electricity savings and potential export credits for your landed home.
Calculator Inputs
This is an example system to explore—not a recommended roof layout. Don’t know your panel count? Ask us to assess your roof.
Enter electricity charges including GST, excluding water, gas and unrelated fees.
SP/SCT export credit: 22.49¢/kWh
Applicable 1 October 2026 to 31 December 2026 for eligible non-contestable residential customers buying electricity from SP Group under Simplified Credit Treatment (SCT). Exported electricity is credited at the regulated tariff less the applicable grid charge. No GST is added to this household export-credit estimate.
Published SP household tariff: 31.16¢/kWh incl. GST (28.59¢ before GST). SCT calculation: 28.59¢ − 6.10¢ grid charge = 22.49¢/kWh.
SP export rates are reviewed quarterly and may change.
Fixed 540W panels; 0.5% annual panel degradation. No annual tariff escalation is assumed. See the planning disclaimer below.
10.8 kWp
20 × 540W panels · Estimated generation: 1060 kWh/month
S$327
Self-consumption savings + grid export credits
Estimated annual savings: S$3,929
S$320
Direct utility tariff offset (1027 kWh)
S$7
Calculated using the SP export rate of 22.49¢/kWh, effective 1 October 2026 to 31 December 2026.
S$473.00
Net electricity cost after estimated solar savings and export income. Excludes fixed fees and other utility charges; retailer export payments may be settled separately.
Estimated 25-Year Cumulative Savings
Includes self-consumption savings and export credits with 0.5% annual panel degradation and unchanged rates. Not net profit: installation, maintenance and replacement costs are not deducted.
Estimated Monthly Generation Allocation (1060 kWh/month)
Based on an estimated generation range of 1040–1080 kWh per month (20 x 540W panels).
Ready for a Site Assessment?
Review roof layout, shading, access and electrical requirements with our team.
Solar generation and savings are estimates for planning purposes. Actual performance varies with roof orientation, pitch, shading, weather, system losses, equipment, household consumption and electricity arrangements, including the actual export scheme. 540W panels may generate approximately 52–54 kWh per month under favourable conditions in Singapore, but actual output can be higher or lower. The estimate uses the midpoint and assumes daytime consumption overlaps with solar generation; actual self-consumption may be lower. Future purchase tariffs and export payments can change.