Test a CB-Series Buoy Solar Tower

This test process applies to all CB-Series buoy solar towers from the CB-150 up to the CB-1250. Pictures depict a CB-450 tower.

  1. Remove the solar tower from the buoy (optional) and verify all panels are clear of debris.
  2. Use cardboard or cloth to shade two of the three solar panels on the buoy and move the tower into sunlight.

Solar tower with a single panel exposed to the sun.


  1. Record the DC voltage observed between Pins 2 (V+) and 3 (GND) of the solar tower’s UW-6 plug cable. Typical panel output in direct sunlight for all buoys is 18-22VDC.


Measure between Pin 2 (V+) and Pin 3 (GND) of the UW-6 plug.

Measuring DC Voltage on a CB-450 tower panel.


  1. Repeat this process two more times, rotating the cardboard/cloth around until all three panels have been isolated and tested.
  2. Switch the positive voltmeter lead over to the 10A port and change the setting to measure DC Amps.
  3. Measuring again between Pin 2 (V+) and Pin 3 (GND), record the current output of each isolated panel. The expected output for each size panel in full sun and in a horizontal orientation is listed below. Note that the observed output will normally be somewhat lower due to the angle at which each panel is mounted to the tower and atmospheric conditions.
    1. CB-150 [10W] – between  0.37-0.46A
    2. CB-250 [15W] – between  0.59-0.72A
    3. CB-450 [15W] – between  0.59-0.72A
    4. CB-650 [32W] – between  1.36-1.67A
    5. CB-950 [46W] – between  2-2.4A
    6. CB-1250 [71W] – between 2.59-3.17A

Measuring DC Amperage on a CB-450 tower panel.


  1. If one or more of the three panels show lower than expected voltage or current output, inspect the surface of panel for visible damage.