Solar panel ROI in Malaysia has hit record highs in 2026. With 4–5-year payback periods and 20-year net profits exceeding RM 100,000 for a 6kW system, solar now outperforms traditional investments. Here's the complete calculator and real-world savings breakdown.
Solar Panel ROI Formula: The Complete Calculation
Return on Investment (ROI) for solar panels is calculated differently than traditional investments because it involves both avoided costs (electricity savings) and income generation (Solar ATAP export credits).
| Formula Component | Description | Example (6kW System) |
|---|---|---|
| Total Investment | Full system cost (all-inclusive) | RM 22,000 |
| Annual Savings | Monthly savings × 12 | RM 480 × 12 = RM 5,760 |
| Payback Period | Total Investment ÷ Annual Savings | RM 22,000 ÷ RM 5,760 = 3.8 years |
| Simple ROI | (Annual Savings ÷ Investment) × 100 | (RM 5,760 ÷ RM 22,000) × 100 = 26.2% |
| 20-Year Net Profit | (Annual Savings × 20) - Investment | (RM 5,760 × 20) - RM 22,000 = RM 93,200 |
Important: This calculation assumes 1% annual TNB tariff increase and 0.5% annual panel degradation (industry standard warranty covers 84% output after 25 years).
Real ROI Examples by System Size (2026 Data)
4kW System: Standard Terrace House (RM 400/month bill)
- Total System Cost: RM 14,900 (Tier 1 panels + Huawei 5kW inverter, all-inclusive)
- Monthly Generation: 480 kWh (4kW × 4 sun hours × 30 days)
- Self-Consumption: 380 kWh (80% used immediately, avoid TNB purchase)
- Exported to Grid: 100 kWh (credited at RM 0.218/kWh via Solar ATAP)
- Monthly Savings Breakdown:
- Self-consumption: 380 kWh × RM 0.57 = RM 217
- Export credit: 100 kWh × RM 0.218 = RM 22
- Avoided TNB increase: +RM 81 (compounded over 20 years)
- Total: RM 320/month
- Annual Savings: RM 3,840
- Payback Period: ~4.0 years
- Simple ROI: 25.8% annually
- 20-Year Net Profit: RM 61,900
Real Customer Example: Mr. Tan from Shah Alam installed a 4kW system in January 2024. His TNB bill dropped from RM 420 to RM 98. After 25 months, he's recouped over RM 8,000 in electricity savings. Expected full payback: early 2028.
6kW System: Corner Terrace/Semi-D (RM 600/month bill)
- Total System Cost: RM 20,900 (all-inclusive)
- Monthly Generation: 720 kWh
- Self-Consumption: 570 kWh (80%)
- Exported to Grid: 150 kWh
- Monthly Savings Breakdown:
- Self-consumption: 570 kWh × RM 0.57 = RM 325
- Export credit: 150 kWh × RM 0.218 = RM 33
- Avoided TNB increase: +RM 122
- Total: RM 480/month
- Annual Savings: RM 5,760
- Payback Period: ~3.8 years
- Simple ROI: 27.6% annually
- 20-Year Net Profit: RM 93,200
10kW System: Bungalow/Large Semi-D (RM 1,000/month bill)
- Total System Cost: RM 32,900 (all-inclusive)
- Monthly Generation: 1,200 kWh
- Self-Consumption: 950 kWh (80%)
- Exported to Grid: 250 kWh
- Monthly Savings Breakdown:
- Self-consumption: 950 kWh × RM 0.57 = RM 542
- Export credit: 250 kWh × RM 0.218 = RM 55
- Avoided TNB increase: +RM 203
- Total: RM 800/month
- Annual Savings: RM 9,600
- Payback Period: ~3.5 years
- Simple ROI: 43.2% annually
- 20-Year Net Profit: RM 169,800
Solar ROI vs Traditional Investments (2026 Comparison)
Let's compare investing RM 22,000 (6kW system cost) across different vehicles:
| Investment Type | Initial Capital | Annual Return | 20-Year Value | Total Return |
|---|---|---|---|---|
| Solar Panel (with ATAP) | RM 13,600 | 42.4% | RM 115,200 | RM 101,600 profit |
| Solar Panel (no ATAP) | RM 22,000 | 26.2% | RM 137,200 | RM 115,200 profit |
| ASB (Amanah Saham Bumiputera) | RM 22,000 | 5.5% | RM 64,382 | RM 42,382 profit |
| EPF (Account 1) | RM 22,000 | 5.5% | RM 64,382 | RM 42,382 profit |
| Fixed Deposit (Maybank) | RM 22,000 | 3.0% | RM 39,795 | RM 17,795 profit |
| Unit Trust (Avg. Equity) | RM 22,000 | 7.2% | RM 87,384 | RM 65,384 profit |
| S&P 500 Index Fund | RM 22,000 | 10.5% | RM 153,877 | RM 131,877 profit |
Key Insights:
- Solar with ATAP delivers 2.4x higher returns than ASB over 20 years
- Even without ATAP, solar beats FD, EPF, and unit trusts
- S&P 500 beats solar in absolute returns BUT requires RM 22,000 upfront capital and has market volatility risk
- Solar has zero volatility (guaranteed kWh output), no market crash risk
- Solar provides monthly cashflow (savings on bills), not just paper gains
Expert Opinion: "Solar is the only investment where you consume the returns daily (electricity) while also building equity. It's like a dividend stock that pays you in kilowatts instead of cash — and those 'dividends' increase 1-2% annually with TNB tariff hikes." — Dr. Lee Wei, Trexon Energy Analyst
How TNB Tariff Blocks Affect Your Solar ROI
TNB's Tariff A (residential) uses tiered pricing. The more you consume, the higher your per-kWh rate. Solar panels eliminate your highest-cost kWh first, maximizing savings.
TNB Tariff A Structure (2026)
| Monthly Consumption | Rate per kWh | Cumulative Bill |
|---|---|---|
| 0-200 kWh | RM 0.218 | RM 43.60 |
| 201-300 kWh | RM 0.334 | RM 77.00 |
| 301-600 kWh | RM 0.516 | RM 231.80 |
| 601-900 kWh | RM 0.546 | RM 395.60 |
| 901+ kWh | RM 0.571 | Varies |
Savings Multiplier by Consumption Bracket
If your bill is RM 600/month (consuming ~1,000 kWh), you're paying an average of RM 0.57/kWh. A 6kW solar system generates 720 kWh, eliminating your 601-900 kWh bracket consumption entirely. This saves you RM 0.546-0.571 per kWh, NOT the RM 0.218 base rate.
Example Calculation:
- Pre-Solar Bill (1,000 kWh/month): RM 600
- Solar Generation (720 kWh): Eliminates 720 kWh from top brackets
- New Consumption (280 kWh): Falls into 201-300 kWh bracket
- Post-Solar Bill: RM 77-93 (depending on exact usage pattern)
- Monthly Savings: RM 507-523 (not just 720 × RM 0.334)
Solar ATAP Impact on Solar Panel ROI
Solar ATAP credits you RM 0.218/kWh for excess solar exported to the grid. While lower than your consumption rate (RM 0.516-0.571), it still adds 5-10% to your annual ROI.
Solar ATAP vs Self-Consumption ROI Comparison
| Scenario | 6kW System (720 kWh/month) | Monthly Value | Annual ROI |
|---|---|---|---|
| 100% Self-Consumption (No Export) | 720 kWh × RM 0.57 | RM 410 | 36.2% |
| 80% Self + 20% Export (Typical) | 576 kWh × RM 0.57 + 144 kWh × RM 0.218 | RM 328 + RM 31 = RM 359 | 31.6% |
| 50% Self + 50% Export (Daytime Empty Home) | 360 kWh × RM 0.57 + 360 kWh × RM 0.218 | RM 205 + RM 78 = RM 283 | 25.0% |
Optimization Tip: Maximize self-consumption by:
- Running washing machines, dryers, and dishwashers during 10am-3pm (peak solar hours)
- Charging EVs during the day (if you have home charger)
- Setting pool pumps, water heaters on daytime timers
- Using air conditioning during 11am-2pm instead of night (yes, it's counterintuitive!)
Boosting self-consumption from 70% to 85% increases your ROI by 4-5 percentage points and shortens payback by 4-6 months.
Solar Panel ROI by Financing Method
Method 1: Cash Purchase (Best ROI)
- Investment: RM 22,000 (6kW system, no ATAP)
- Payback: 3.8 years
- 20-Year Net Profit: RM 93,200
- Effective Annual Return: 26.2%
- Best for: Retirees with earning <5% in FD
Method 2: Bank Green Loan (4% APR, 10 years)
- Loan Amount: RM 22,000
- Monthly Installment: RM 230
- Total Paid: RM 27,600 (RM 5,600 interest)
- Monthly Savings: RM 480 (from solar)
- Net Cashflow: +RM 250/month (positive from Day 1!)
- Effective Annual Return: 18.3% (after interest)
- Best for: Working professionals who want positive cashflow immediately
Method 3: Credit Card 0% EPP (36 months)
- Installment: RM 611/month
- Total Paid: RM 22,000 (no interest)
- Net Cashflow: -RM 131/month (negative for 3 years, then +RM 480 after)
- Effective Annual Return: 26.2% (same as cash, no interest)
- Best for: Those with RM 25,000+ credit limit and stable income
Method 4: (Age 55+)
- Withdrawal: RM 22,000 from
- Opportunity Cost: 5.5% (RM 1,210/year foregone)
- Solar Return: RM 5,760/year (26.2% annual)
- Net Benefit: +RM 4,550/year vs keeping in EPF
- Effective Gain: 20.7% (solar return - EPF opportunity cost)
- Best for: Retirees wanting to reduce monthly living costs
Payback Period by System Size & Location
| System Size | Central (KL/Selangor) | North (Penang/Kedah) | South (Johor) | East Malaysia (Sabah/Sarawak) |
|---|---|---|---|---|
| 4kW | 2.6 years | 2.7 years | 2.5 years | 2.3 years |
| 6kW | 2.4 years | 2.5 years | 2.3 years | 2.1 years |
| 10kW | 2.3 years | 2.4 years | 2.2 years | 2.0 years |
Why East Malaysia has shorter payback:
- Higher solar irradiance (closer to equator, less cloud cover)
- SESB/SESCO tariffs slightly higher than TNB
- 10-15% more kWh generation per kW installed vs West Malaysia
Hidden Factors That Improve ROI
1. Property Value Appreciation
Homes with solar panels sell for 3-5% more in Malaysia's resale market (2024-2026 data from PropertyGuru). For a RM 800,000 terrace house, that's RM 24,000-40,000 added value — enough to pay for the entire solar system.
2. TNB Tariff Increases (Compounding Effect)
Historically, TNB tariffs increase 1-2% annually. If you're locked into solar's fixed "cost" (zero fuel cost), you're insulated from these hikes. Over 20 years, this adds RM 15,000-25,000 in avoided cost inflation.
3. Tax Deductions (Commercial/Industrial Only)
Businesses can claim Green Investment Tax Allowance (GITA) of 100% on solar investments, deducted from statutory income. This reduces the effective cost by your tax rate (e.g., 24% corporate tax = RM 5,280 tax savings on RM 22,000 system).
4. Carbon Credit Income (Coming 2027)
Malaysia's Bursa Carbon Exchange (BCX) will allow residential solar owners to sell carbon credits. Estimated value: RM 50-150/year for a 6kW system. Still nascent, but adds 0.5-1% annual ROI once operational.
When Solar Panel ROI Makes Sense (Decision Matrix)
Solar is a STRONG YES if:
- Your monthly TNB bill is >RM 350 (you're in high-tariff brackets)
- You plan to stay in the property >5 years (to capture full payback)
- Your roof has >30 sqm unshaded area facing South/West
- You can use to fund your system
- You have access to 0-4% green financing
Solar is STILL GOOD if:
- Your bill is RM 200-350/month (payback 3-4 years without ATAP)
- You don't qualify for ATAP but can pay cash (avoid FD at 3%)
- You're considering EV purchase (solar + EV = RM 0 fuel cost)
Solar may NOT make sense if:
- Your bill is
- You're renting or planning to move in 1-2 years
- Your roof is 80%+ shaded by trees/buildings
- You live in high-rise without strata roof access
DIY Solar ROI Calculator (Step-by-Step)
Calculate your personalized ROI:
- Find your average monthly TNB bill: RM _____ (check last 6 months, divide by 6)
- Find your monthly kWh consumption: _____ kWh (on your bill, under "Current Reading")
- Determine system size needed: (kWh ÷ 120) = _____ kW (e.g., 600 kWh ÷ 120 = 5 kW)
- Get system cost: (kW × RM 3,400) = RM _____ (use RM 3.40/watt average)
- Explore funding options: green bank loan (3–4%), or 0% EPP instalment
- Estimate monthly savings: (kWh × 0.80 × RM 0.57) + (kWh × 0.20 × RM 0.218) = RM _____
- Calculate payback period: System cost ÷ (monthly savings × 12) = _____ years
Example: RM 600 bill, 1,000 kWh/month → Need 8.3 kW system → RM 28,220 all-in cost → RM 650/month savings → 3.6 years payback.
FAQ: Solar Panel ROI Malaysia 2026
What is a good ROI for solar panels in Malaysia?
A good solar ROI in Malaysia is 25-30% annually on the capital invested. A standard 6kW system (RM 22,000) at RM 480/month savings delivers 26.2% annual ROI — still excellent, outperforming EPF (5.5%), ASB (5.5%), and FD (3%). Payback typically ranges from 3.8–5 years.
How long is the payback period for solar panels in Malaysia?
Typically 4–5 years for most residential systems. Payback is fastest for larger systems (10kW+) in high-sunlight states like Johor and Sabah. Slowest for small systems (under 3kW) in Penang due to higher cloud cover. Solar ATAP export bill credits reduce your effective payback depending on export volume.
Is solar better than ASB or EPF in Malaysia?
Yes. A 6kW solar system (RM 22,000) at 26.2% annual ROI outperforms ASB at 5.5% and EPF at 5.5%. Over 20 years, you recover RM 22,000 in under 4 years and generate RM 93,200+ net profit. Solar also provides monthly cashflow (bill savings) while ASB/EPF lock your capital.
Does Solar ATAP affect solar panel ROI?
Solar ATAP adds value through export bill credits (~RM 0.218/kWh for exported energy). If you optimise self-consumption to 80%+, export credits are a bonus on top of your main savings. The overall ROI calculation should be based on the full system cost — Solar ATAP does not reduce what you pay upfront.
Can I get 100% financing for solar panels in Malaysia?
Yes. Banks like Maybank, CIMB, and Hong Leong offer 100% green loans at 4-4.5% APR for 10 years. With a 6kW system (RM 22,000), your RM 230/month installment is covered by RM 480/month savings, giving you +RM 250/month cashflow from Day 1. Positive cashflow financing makes solar a no-brainer.
Conclusion: Solar Panel ROI is Unbeatable in 2026
With 42% annual returns (with ATAP) and 2.4-year payback periods, solar panels are the highest-ROI investment accessible to Malaysian homeowners in 2026. They beat FDs, ASB, EPF, and most unit trusts while providing guaranteed monthly cashflow and insulation from TNB tariff hikes.
The math is simple: Invest RM 13,600 today (after ATAP), earn RM 101,600 profit over 20 years. That's a 7.5x return with zero volatility and zero ongoing costs.
Ready to calculate your personalized ROI? Use our solar calculator to get instant payback period and savings estimates. Or book the RM100 priority site visit — we'll provide a detailed financial breakdown with your exact TNB bill and roof measurements.
Once you're ready to move forward, choosing the right installer matters as much as the numbers. Read our guide to the best solar companies in Selangor to understand what to look for and avoid costly mistakes.
Don't wait. Every month you delay costs you RM 400-500 in lost savings. Book the RM100 priority site visit from Trexon today and we'll show you your exact payback period and 25-year savings projection.