https://en.wikipedia.org/wiki/Concentrated_solar_power#CSP_with_thermal_energy_storage

The problem with solar panels is they're only used during the day and small homeowners storing their power in batteries isn't very efficient. CSP is industrial size and can store thermal energy underground using molten salts. That's a longer term storage of energy, and can double as a source of heating peoples homes (http://helioscsp.com/tibets-first-solar-district-heating-plant/)

some megaprojects have fallen apart due to its high price and technically issues:

The European Union looked into developing a €400 billion (US$774 billion) network of solar power plants based in the Sahara region using CSP technology to be known as Desertec, to create "a new carbon-free network linking Europe, the Middle East and North Africa".

https://en.wikipedia.org/wiki/Desertec#Obstacles