Peninsular Malaysia · TNB Domestic Tariff
Residential Solar ROI Calculator
How fast does your roof pay you back?
Enter your average TNB bill and adjust your target offset or panel count — we'll recommend a full solar PV setup and project your 25-year return.
Your Electricity Bill Step 1
Estimated usage: — kWh/month
System Sizing Step 2
% of your current usage solar should aim to cover.
620 Wp panels. Min 7 panels, max 48 panels (≈30 kWp system cap).
Incentives Step 3
One-time rebate deducted from upfront installation cost.
Recommended Solar PV Setup
Number of Panels
—
620 Wp each
System Size
— kWp
— offset achieved
Recommended Inverter
— kWAC
1.2x oversizing ratio
Annual Generation
— kWh
Year 1 forecast
Your Estimated Returns
Payback Period
—
based on self-consumption savings
10-Year Net Profit
—
ROI —
25-Year Net Profit
—
ROI —
Est. Install Cost
RM —
after rebate · RM2,500/kWp
Monthly Savings (Yr 1)
RM —
— of bill offset
Cumulative cash position
Break-even line
Hover / tap a point for that year's breakdown
Assumptions:
• Peak sun hours set to a conservative 3.4 hours/day. Actual peak may be up to 4 hours/day, thus generating higher yield.
• Rates depend on average monthly consumption: ≤1,500 kWh/month = Energy Charge Rate RM0.2703/kWh and Domestic Tariff RM0.4443/kWh; >1,500 kWh/month = RM0.3703/kWh and RM0.5443/kWh respectively.
• AFA/ICPT surcharge excluded.
• Panel rating: 620 Wp.
• O&M cost: RM800/year is FREE for the first 3 years.
• Figures are estimates for illustration only and may not reflect actual outcomes; consult a licensed solar installer such as Recharge Xolutions for a final quotation.