The adoption of rooftop solar power systems (PLTS) is gaining popularity among the public as a solution to cut electricity costs and transition to clean energy which is good for environment. However, conflicting information circulating in the public sphere still gives rise to various technical and financial doubts.
To help you make an objective decision regarding energy investment, here is a comprehensive breakdown of myths and facts about solar power systems, based on data and technical studies on renewable energy.
1. Weather Effectiveness and Solar Radiation
Myth: Solar Panels Do Not Work During Overcast Weather or Rainy Season
Many assume that the absence of intense sunlight automatically halts electricity production from solar panels, for instance, during the rainy season or when it is cloudy.
Technical Fact: Photovoltaic Modules Still Absorb Diffuse Radiation
Photovoltaic (PV) systems operate by converting light particles (photons) rather than solar heat (thermal energy). Even when the sky is overcast or it is raining, the modules continue to generate electricity—producing approximately 10% to 25% of their nominal capacity, by utilizing diffuse radiation. Furthermore, rainwater naturally helps clean away dust accumulated on the panel surfaces.
2. Investment Value and Payback Period
Myth: Solar Power Installation Costs Are Too High and Hard to Recoup
Solar power systems are often viewed as a luxury technology that only yields returns over a very long period.
Technical Fact: Technology Costs Are Dropping and Offering Clear ROI
According to a report by the International Renewable Energy Agency (IRENA), the capital cost of photovoltaic technology has fallen by more than 80% over the last decade.
Thanks to the efficiency of modern panels, the average payback period for residential and commercial installations ranges from 5 to 7 years, while the productive lifespan of the panels extends to 25 to 30 years.
3. Grid Reliability and Backup Power
Myth: Automated Homes Are Immune to Grid Outages After Installing Solar PV Systems
Users often assume that on-grid solar PV systems automatically function as emergency generators during a total power outage.
Technical Fact: Anti-Islanding Protection Shuts Down On-Grid Systems for Safety
In solar PV systems without batteries (on-grid), inverters are required to have an automatic protection feature known as "anti-islanding." This feature instantly cuts off power supply when the grid goes down to prevent dangerous backfeeding, which could harm transmission workers in the field.
If you require backup power during outages, you need to choose a hybrid system equipped with a battery storage unit.
4. Maintenance Complexity and Costs
Myth: Solar Panel Maintenance Is Complicated and Expensive
The assumption that solar PV modules require specialized mechanics and routine spare part replacements makes potential users hesitant.
Technical Fact: Solid-State Components Require Minimal Maintenance
Solar panels are solid-state devices with no moving parts, resulting in a very low risk of mechanical wear and tear. Primary maintenance generally consists only of periodically cleaning the glass surface with clean water to prevent dirt accumulation (soiling loss) that could block light absorption.
5. Environmental Impact and Recycling
Myth: Damaged Solar Panels Become Nothing More Than Toxic Waste
Concerns arise that solar panel waste at the end of its service life cannot be recycled and will contaminate the soil.
Technical Fact: Solar Panel Materials Can Be Recycled
The primary composition of solar panels includes glass, aluminum, copper, and silicon. Industry research data indicates that recycling technologies allow these materials to be reused within the manufacturing supply chain.
Conclusion
Understanding the technical workings of solar PV systems helps consumers avoid unfounded doubts. With proper capacity planning, a rooftop solar PV system proves to be a safe, efficient, and eco-friendly long-term investment for your property.
Hopefully, this article helps you avoid misinformation or disinformation regarding solar PV systems and solar panels.