Because there are many such solar cell factories, but many of them just do simple solar cell assembly and have no technical content. Such factories vary in scale, so I won't list them one by one.
Let's talk about the more powerful. I think Chuangyi in Shenzhen, Dupont Solar, Tuori New Energy, Jiawei Industry and CSG Photovoltaic in Dongguan are all famous.
Other battery factories are also located in Shenzhen, Dongguan and Zhongshan.
I hope my answer is helpful to you ~