Compared to the first models on the market, the price of solar energy has plummeted. A little over sixty years ago solar panels were much less efficient but cost a fortune – about 100$ per watt vs. $0.3-0.5.
[pdf] 350W solar panels tend to weigh about 40 lbs, being approximately 67 inches long and 40 inches wide. Monocrystalline modules with this wattage have 60 or 72 cells, but polycrystalline panels have at least.
[pdf] On March 29 this year, the head of the Committee for Architecture and Construction, Nizom Mirzozoda, issued a new order, under which, starting on April 1, 2024, all new and renovated buildings must be equipped with solar energy systems capable of storing at least one day's worth of electricity, in addition to being connected to the central power grid.
[pdf] 
