Vietnam's southern region, including the Mekong Delta and Ho Chi Minh City area, enjoys a tropical climate with abundant sunshine year-round. The rainy season, which typically lasts from May to November, could raise the question whether it still makes sense to get a solar system. After all, if it is going to rain for 6 months, does the SmartSolar solar system on your roof still produce electricity?

Despite the frequent showers, Ho Chi Minh City still receives an average of 5-6 hours of sunlight per day during the rainy season. On top of that, modern solar panels are designed to harness both direct and diffused sunlight, ensuring consistent energy production even on cloudy days. In fact, high-quality panels can generate up to 25% of their peak output even under cloudy conditions.

From past customer projects, we know that even in the rainiest months, production only goes down by about 10-20% vs average monthly production throughout the year. Peak months are usually April and May where there is lots of sun and no rainfall. To illustrate, a typical 5kWp system produces around 600kWh per month on average. In peak months, it might reach up to 700kWh, whereas in rainy months, such as July and August, it might go down to 500kWh. Still a surprisingly high amount of electricity, even though it is raining almost every day during those months.

So, don't let the rain dampen your solar power aspirations. Embrace the opportunity to harness the sun's energy and enjoy the many benefits of a rooftop solar PV system throughout the year. Small bonus, the rain even acts as a cleaning service. A good rainy shower ensures that the solar panels are clean and free of dirt and dust. So when the sun comes back after a rainy patch, the solar panels are clean and ready to produce at peak capacity.

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