What is Solar Energy and How Does It Work?
April 21, 2026
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At Watts & Ergon, we believe that understanding the “how” and “why” of solar technology is the first step toward energy independence.
Solar ROI Calculator: How to Calculate Your Return on Solar Investment in Dubai
In this guide, we’ll walk you through everything you need to know about the Solar ROI Calculator, the exact formulas, key factors, and real-world examples tailored to Dubai villas and apartments. We’ve also included ready-to-use tables so you can see the numbers at a glance.Watts & Ergon,
Switching to solar isn’t just about going green — it’s one of the smartest financial decisions you can make in Dubai. With high electricity tariffs from DEWA, excellent net metering, and world-class solar irradiance, most homeowners and businesses see their investment pay back in just 4–7 years.
What Is Solar ROI?
Solar Return on Investment (ROI) measures how quickly your solar system pays for itself through electricity bill savings and how much money it generates over its 25-year lifetime.
The Simple Solar ROI Formula
Payback Period (years) = Initial System Cost (AED) ÷ Annual Electricity Savings (AED)
Real-World Examples
Example 1: 5 kW System (Typical 2–3 Bedroom Apartment)
- Total Cost: AED 17,800
- Annual Production: ~8,030 kWh
- First-Year Savings: AED 2,820
| Metric | Year 1 | Year 5 | Year 10 | Year 25 |
|---|---|---|---|---|
| Annual Savings (AED) | 2,820 | 3,150 | 3,670 | 4,850 |
| Cumulative Savings (AED) | 2,820 | 14,850 | 33,200 | 97,500 |
| Cumulative Cash Flow (AED) | -14,980 | -2,950 | +15,400 | +79,700 |
| Payback Period | 6.3 years | |||
Example 2: 10 kW System (Typical 4-Bedroom Villa)
- Total Cost: AED 35,000
- Annual Production: ~16,400 kWh
- First-Year Savings: AED 5,830
| Metric | Year 1 | Year 5 | Year 10 | Year 25 |
|---|---|---|---|---|
| Annual Savings (AED) | 5,830 | 6,510 | 7,590 | 10,020 |
| Cumulative Savings (AED) | 5,830 | 30,650 | 68,500 | 201,200 |
| Cumulative Cash Flow (AED) | -29,170 | -4,350 | +33,500 | +166,200 |
| Payback Period | 6.0 years | |||
Villa vs Apartment Comparison
| Factor | 5 kW Apartment | 10 kW Villa | Winner |
|---|---|---|---|
| Total Investment | AED 17,800 | AED 35,000 | Apartment |
| Payback Period | 6.3 years | 6.0 years | Villa |
| 25-Year Net Profit | AED 79,700 | AED 166,200 | Villa (2.1×) |
Ready to Calculate Your Own Solar ROI?
Drop us your latest DEWA bill and roof photos. We’ll send you a free personalised Solar ROI Report within 24 hours.
📍 Dubai, UAE | 📞 Call or WhatsApp for your free consultation
Perovskite Solar Cells 2026: The Next Revolution in Solar Technology
April 20, 2026
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Perovskites are synthetic materials with a unique crystal structure that excels at absorbing sunlight.Watts & Ergon,
Government Incentives for Solar Energy in UAE 2026:
April 20, 2026
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While there are no direct cash subsidies or tax credits for residential and most commercial solar installations, the real incentives come in the form of excellent net metering / self-supply programs, streamlined approvals, zero connection fees (in many cases), and long-term grid access — delivering payback periods of just 4–7 years in Dubai.Watts & Ergon,