Understanding solar ROI in Thailand
Thailand averages 4–5 peak sun hours per day. A correctly sized home system with a THB 10,000/month electricity bill may typically pay back in around 6–8 years under suitable operating conditions, though exact figures depend on electricity usage, tariff, roof layout, shading, and final system design. Commercial properties — hotels, offices, and factories — with higher bills and strong daytime consumption often see compelling payback, depending on their load profile and tariff type. Preliminary estimates are confirmed after a site survey and energy usage review.