Longi Solar Panels
Longi was the fastest growing solar maker in 2016 and also 2017. Fast growing, they had also 5GW of capacity and had produced 2.35 megawatts worth of panels
LONGi, founded in 2000, then at that time only making silicon ingots. Other panel makers used these to make their own panels, and were so good that the business took off.
Longi have grow fast, and now make their own high quality Longi Panels with a 10 year warranty and 25 year output guarantee.