The cost is a bit annoying and the technology is difficult. It is recommended to purchase solar panels + batteries + inverters to do so.
You can only generate photothermal energy by yourself. Paint an aluminum plate black, press the thermoelectric power generating part below and below the thermoelectric power. The generating part is an aluminum plate and dip the aluminum plate underneath into water. But the electricity produced is pitiful.
2. Use hot water from solar water heater + thermoelectric film: make a heat exchanger, use hot water to heat the upper plate, and use cold water to cool the lower plate if there is a temperature. difference on both sides of the thermoelectric film, electricity will be generated.
3. Use heat pipes + thermometers
4. Heat pipes + working fluid Freon + motor thermic + generator (the configuration of a solar power plant cannot be carried out by individuals)