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