Solar Hot Water System Panel Size

So a typical 4 person family will need a system sized at 300 litres which has 2 panels.

Solar hot water system panel size.

Having said that many 4 person households who are very water efficient get by just fine with a 150 litre system with 1 panel. Use the formula below to do this calculation. This particular solar water panel on average will produce 27 100 btu a day with mildly cloudy solar conditions. By raising water temperature your swimming season can be extended in colder locations by as much as 100 and works year round in warmer weather.

For an 80 gallon tank then you will need 53 square feet of collector. A properly sized solar panel system will raise water temperatures adequately. Using these output measurements we can determine how many square feet of collector we will need to heat a single gallon of water. In the midwest and atlantic states you will need one square foot of collector per gallon of tank capacity.

At the end of the day a good installer will look at your usage and advise you exactly what size to go for. X is your set point temperature typically 135f y is the well mains water temperature. Use the solar panel sizing calculator to determine the right amount of paneling you will need to heat your pool year round. Sizing ratio 1 15 8 34 x y z.