How
much energy an AP 30 solar collector will produce each day/month/year?
Insolation
Level 
Before you calculate your energy output, you must know your solar insolation
level. This is available from the insolation page. Take
note of your max and min levels throughout the year as well as the annual
average value. When assessing potential energy savings, input annual average
insolation, and take note of the "per year" energy output value.
Energy must be input in the unit kWh/m^{2}/day >>> 1 kWh/m^{2}/day = 317.1 Btu/ft^{2}/day
What is solar insolation?
Amount of electromagnetic energy (solar radiation) incident on the surface of
the earth. Basically how much sunlight is shining down on us.
State

City

Latitude

Longitude

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year Avg

IL

Chicago

41' 53" N

87' 38" W

1.5

2.45

3.2

4.48

5.56

6.07

5.68

5.27

4.51

3.07

1.69

1.26

3.72

Collector Size  You must enter the collector size
in absorber surface area.
The absorber surface area of the various tubes sizes are as follows:
 58/1800 = 0.08m^{2} per tube. Therefore an Apricus AP 30 tube = 2.4m^{2} absorber area
 58/1500 = 0.067m^{2} per tube
So I assume we will use AP 30 but I am not sure this is
right because I couldn’t remember. I should check. But this is assumption.
Energy Cost  Enter cost per kWh in your local
currency (may need to convert from m^{3} or Therms)
1 therm = 29.3kWh = 100,000Btu = 105.5MJ
Natural Gas is 39MJ/m^{3} = 10.83 kWh/m^{3}
LPG Propane (liquid) = 25.3MJ/L = 7kWh/L
LPG Propane (gas) = 93.3MJ/m^{3} = 25.9kWh/m^{3}
