Replace Solar Regulator in SP-Series Solar Power Pack
Solar regulator replacements do not follow a regular maintenance schedule. Regulator failures are rare and may only be necessary if improper charging behavior is observed:
- Weak or no charging response on unloaded battery with clean panel in direct sunlight.
- Excessively high charging voltages on the battery (significantly greater than 15V).
Should a regulator require replacement, contact NexSens to source a SA3018 solar regulator and then proceed.
- Remove the solar pack from its mounting location and place it on a flat work surface.
- Typically the easiest means of removing the solar pack is to remove both socket head cap screws from the angle adjustment bracket using a 3/16″ hex driver.
- Loosen the four screws securing the battery housing to the panel mount using the same 3/16″ hex driver.
- Carefully lift up on the enclosure and set the housing to the side. Avoid placing tension on the connected solar panel cable as it is moved.
- Remove the battery from the enclosure and disconnect the negative and positive cable leads.
- Locate the two Molex connectors linking the regulator to the solar panel and the UW-6 pigtail, respectively, and disconnect both.
- Connect the new regulator such that:
- The yellow & black regulator cable pair connects to the solar panel lead.
- The red & black regulator cable pair connects to the UW-6 plug lead.
- The black wires from both pairs of connectors align.
- Re-connect the leads to the battery and carefully place it back inside the housing. Ensure none of the cabling is pinched.
- Replace the small bag of desiccant in the enclosure.
- Verify the panel bracket’s O-ring is free from debris and damage and is seated properly in its groove.
- Re-align the battery enclosure with the solar panel mount and tighten down the four screws evenly using a 3/16″ hex driver.
- Check the pack voltage to verify the battery is properly connected.
- Place the pack outdoors exposed to sunlight for a couple of hours and compare the starting and ending voltages to confirm the system is charging properly.