In the sunny city-state of Singapore, harnessing solar energy is crucial for sustainable development. As we explore the concept of Peak Sun Hours (PSH), we’ll delve into how it impacts solar panel installations and why it matters for homeowners and businesses. 

What Are Peak Sun Hours? 

Peak Sun Hours refer to the duration during which sunlight intensity reaches an average of 1,000 watts per square meter. In simpler terms, it’s the amount of sunlight that provides the same energy output as 1 kilowatt-hour (kWh) per square meter. Imagine it as the most productive hour for solar panels, akin to the sun operating at full throttle. 

Why Do Peak Sun Hours Matter? 

Understanding PSH is essential for sizing solar panel systems accurately. When planning a solar installation, homeowners and businesses need to determine the optimal system size to meet their energy demands. Here’s how PSH comes into play: 

  1. Sizing Solar Systems: PSH data helps calculate the number of panels required to generate sufficient electricity. By assessing average PSH for a specific location, you can tailor the system size accordingly. 
  2. Energy Production Estimation: Knowing PSH allows you to estimate the energy output of your solar system. For instance, a 1 kW solar array during a peak sun hour would ideally produce 1 kWh of electricity (before accounting for system losses). 

Calculating Peak Sun Hours 

Historical data helps estimate daily sunlight exposure. Let’s illustrate this with an example: 

Suppose you reside in Singapore, where the average PSH is approximately 4.5-5 hours per day. During these hours, the sun delivers around 5.8 kWh of sunlight per square meter. Solar panels are typically rated at 1,000 W/m² (1 kW/m²) input. Therefore, a 1 kW solar array would output 1 kWh of electricity during a peak sun hour. 

Applying PSH to Solar Rooftop Installation 

To analyse installation size, consider the following steps: 

  1. Record Electricity Usage: Monitor your electricity meter throughout the day. Note the readings at different times, such as 8:00 a.m. and 5:00 p.m. 
  2. Calculate PSH: Suppose your meter readings changed by 25 units (kWh) during the day. Divide this by the 5 hours of PSH (as estimated for Singapore). The result is 5 kW—the recommended power size for your Solar Rooftop system. 

Harnessing solar energy efficiently requires understanding Peak Sun Hours. By sizing your solar system appropriately, you can maximize energy production and contribute to a greener future. 

Ready to Harness Solar Power? 

Discover how Enovatek Energy Solutions can transform your rooftop into an eco-friendly energy hub. At Enovatek, we bring expertise, tailored solutions, and efficiency to every solar project. With years of experience, we’re your trusted solar partner. Our team understands the nuances of solar technology, installation, and maintenance. No two rooftops are the same, so we customize solar systems to meet your unique needs—whether it’s a residential rooftop or a commercial space. Our cutting-edge technology ensures maximum energy production, allowing you to slash electricity bills, reduce your carbon footprint, and enjoy reliable, clean energy as they are designed to capture every ray of sunlight efficiently. 

Contact Us Today! Visit Enovatek Energy Solutions or call us at +65 6337 5154. 

Let’s power up Singapore together! 


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