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;
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