First of all, under normal circumstances, when we install solar, the heat collection surface is oriented about 5 degrees west of south. You can compare it based on this common standard. Secondly, there are solar water heaters that can be installed on the balcony, but they are not solar water heaters that integrate vacuum tubes and solar water tanks.
Why do other people's solar lights turn on when I walk on the balcony?
Yes, ordinary solar power can be installed on the balcony. However, the direction of the balcony is towards the sun. The balcony should meet the south facing balcony. Opposite, there is no building higher than the ground of your house within 50 meters in a straight line to block direct sunlight. Otherwise, any solar energy not only on the balcony but also installed on it. the roof will be useless. THETheoretical altitude and elevation values should be estimated based on your local dimensional values... There are many solar elevation angles available in Baidu.
Thermal detection device. Other people's solar lights are equipped with heat sensing devices. If you walk on your balcony and are within range of the heat detection device, the solar lights will turn on. Solar lighting uses sunlight as energy during the day, uses solar cells to charge the battery, converts solar energy into chemical energy and stores it in the battery, and uses the battery as an energy source to provide energy to energy-saving lamps when used at night.