How to use an auto 12-volt regulator for a solar panel

Written by joe capristo
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How to use an auto 12-volt regulator for a solar panel
A charge controller will help keep your solar panel in working order. (Jupiterimages/ Images)

If you plan to use solar energy on a large scale, you will need a battery bank of deep cycle 12-volt batteries. To keep your battery bank fully charged and functioning optimally, you will need to install a charge controller between the solar panel array and the battery bank. Without the charge controller, the batteries could overcharge. Overcharging depletes battery life and causes batteries to leak and even explode. Take care of your solar power system by installing this simple mechanism.

Skill level:

Things you need

  • Charge controller
  • Soldering iron
  • Solder
  • Nuts and bolts
  • Adjustable wrench or socket set

Show MoreHide


  1. 1

    Find a charge controller that has the correct specifications for your solar panel array. The charge controller must be able to handle the amperage load of your solar array. In many cases a 45-amp charge controller with a 50-amp fuse will be sufficient, however it is best not to leave it to chance. Consult an electrical professional or a detailed guidebook on constructing solar energy generators. You can purchase charge controllers from a variety of online retailers as well as local electronic parts stores.

  2. 2

    Connect the charge controller to your system between the solar panel array and the battery bank. Depending on the gauge of the existing wiring, you may solder it in place or use nuts and bolts to clamp the wires together.

  3. 3

    Set the charge controller to turn the electrical current from the solar panels on when the charge of the battery bank drops below 11.7 volts and to shut the current off when the charge of the batteries exceeds 14.3 volts.

  4. 4

    Allow the solar array to charge your battery bank normally. Once the system is charged, you are ready to safely use the electricity you have stored.

Tips and warnings

  • Invest in a proper charge controller that will not only prevent the solar panels from overloading your battery bank, but will also keep the solar array from draining the battery system at night.
  • Mishandled batteries can be dangerous. If you have any doubts about your system, consult a professional.

Don't Miss

  • All types
  • Articles
  • Slideshows
  • Videos
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the site, you consent to the use of cookies. For more information, please see our Cookie policy.