How to choose home solar panels?

Want to install home photovoltaics but worried about buying the wrong one? Actually, choosing the right solar panels is easy by focusing on three key indicators. First, consider conversion efficiency. Currently, mainstream monocrystalline modules have an efficiency of 23%-25%. For example, N-type TOPCon modules generate 5%-8% more power than traditional P-type modules, making high-efficiency modules more cost-effective for smaller roofs. Second, consider the warranty period. Opt for brands with a 10-year product warranty and a 25-year power warranty to avoid future repair complications. Finally, consider compatibility. For balcony installations, choose small, high-power modules (such as 166mm). For rooftop installations, pay attention to module weight (≤20kg per square meter) to avoid damaging the roof.

For a real-world example, Mr. Zhang in Beijing chose 25%-efficiency modules for his 20-square-meter roof. He generates an average of 21,000 kWh of electricity annually, saving 1,200 yuan in electricity bills compared to 22%-efficiency modules. Also, don’t just look at the price. Cheaper modules may use recycled silicon, which can degrade in power after just one or two years, making the cost more than the benefit. Choosing the right modules can save you the equivalent of a full appliance over 25 years. Do the math!