DIY solar hot water system for a summer cottage

DIY Solar

It (absorbing solar radiation) can heat 50 liters of water to 50-80 degrees Celsius and keeps this temperature until morning (but the morning temperature will be 15-20 degrees less). Its output can be connected to the input of an electric hot water system, and this connection reduces its electricity consumption by 2-3 times.

Credit Sergiy Yurko2