How to Replace the Battery on a NexSens SP-Series Solar Power Pack

Every couple years (2-3) a NexSens SP-Series Solar Power Pack battery should be replaced in order to ensure reliable power delivery. Follow the guide below to properly replace the battery.

  1. Disconnect the UW-6 pigtail cable from the logger.
  2. Remove the Solar Pack from its mounting location and place it on a flat work surface.
    1. Typically the easiest means of removing the Solar Pack is to remove both 1/4-20 x 1-1/2″ socket head cap screws from the angle adjustment bracket using a 3/16″ hex driver.

      The angle adjustment screws are connected to the pole mount bracket.

  3. Remove the (4) 1/4-20 x 3″ socket head cap screws on the back of the battery box using a 3/16″ hex driver.

    Remove the labeled screws to separate the battery compartment from the panel.

  4. While holding the panel and box together flip the assembly over so the panel is facing up.

    Front view of the Solar Power Pack

  5. Lift the panel off the box and place to the side.

    Open battery compartment on the back of the solar panel.

  6. Remove the desiccant.

    Replace the desiccant in the battery compartment.

  7. Stand the battery box up and remove the battery.
    1. Avoid putting tension on the cable that connects the panel and the battery compartment.

      Remove the battery from the battery compartment.

  8. Disconnect the red and black fastons from the old battery.

    The battery has been completely removed from the compartment.

  9. Connect the red and black fastons to the new battery.

    A new battery has been reconnected to the leads in the battery comparment.

  10. Gently insert the battery back into the housing.

    The new battery has been re-inserted back into the battery compartment.

  11. Push the wires above the battery.
  12. Re-install the desiccant.
    1. Note that this is a good time to replace the desiccant (Should be done every couple years).

      A new desiccant has been placed in the battery compartment.

  13. Inspect the EPDM 160 O-Ring to ensure it is seated well in the O-Ring groove.
    1. Ensure it is not cut, out of alignment, or degrading. If there is any damage, replace the O-Ring.

      The O-Ring surrounding the battery compartment is crucial to its waterproof seal.

  14. Place the panel back on top of the battery box and ensure it seats into the groove.
  15. While holding the panel and box together flip the assembly over so the panel is facing down.
  16. Reinstall the (4) 1/4-20 x 3″ socket head cap screws on the back of the battery box using a 3/16″ hex driver.

    Re-install the battery compartment screws labeled in the image above.

  17. Re-mount the Solar Pack.
  18. Re-connect the UW-6 to the logger.