Solar Collector Sizing

Calculate the number of solar tubes

Calculate How Much Energy the SunMaxx Collector Will produce each day/month/year. The SunMaxx evacuated solar tubes can be used for heating hot water, domestic water, radiant floors, and boiler systems.

Before you proceed, you will need to know a few things.

1. First, you will need to know the daily insolation levels kWh/m2 and then convert them to Btu/ft2/day. (1kWh/m2 / day = 317.1 Btu/ft2/day) .
2. 1. Click here to find out what your Insolation level is in your area.
3. Calculate the total collector area for your solar collectors.
4. 1. 2.2m2 for 20 tube collector
   2. 2.75m2 for 25 tube collector.
   3. If you have three SunMaxx-20 panels, then you have 2.2*3=6.6m2
5. Energy cost in USD/kWh: Example: $0.14/kWh.

*Keep in mind that you will not have to pay electricity demand fees or standard monthly fees which occur in many places within the United States.

Insolation Levels Chart