1. The principle is different: Photovoltaic - high-purity silicon can use solar light to generate direct current, photovoltaic power generation; Photothermal--collecting the solar thermal processing into the vapor state, promoting the turbine, the generator generating alternating current, photothermal power generation; the principle is the same as traditional power generation; 2. Different ways of energy storage: Photovoltaic-batteries have a service life of several years and need to be replaced. Replaced batteries will cause a lot of pollution. Photothermal-thermal storage tank; use hot-melt salt, no need to replace, just add; 3. Use different directions: Photovoltaic - suitable for decentralized, small-scale, upscale cities; small local area power supply Light and heat - suitable for centralized, large-scale, general areas; the entire region, province, and even the country's large-scale power supply, using only 100 square kilometers of solar thermal energy in Xinjiang desert, enough for our electricity in China; Xinjiang desert is 42.48 10,000 square kilometers; 4. The relevant industrial chain is different: Photovoltaic--Si ore production, purification, slicing, product, and related industry chain are professional; Light and heat - steel, glass, cement, etc., involving many industries, similar to real estate, related industry chain length, very rich; 5. Different ownership of core technology and equipment: Photovoltaic - core technologies and equipment are controlled by Germany, Russia, Japan, and the United States; we need to spend a lot of foreign exchange to buy; Photothermal--the core technology and equipment are all domesticated; all intellectual property rights are completely state-owned; Carbide Inserts,Cemented Carbide,Full Dimension Turning Insert,High Hardness Turning Insert Zhuzhou Zhirong Advanced Material Co., Ltd , https://www.zrcarbide.com