What do I need to use a solar panel to charge a deep cycle battery?

I am looking at buying a 45 watt solar panel and a deep cycle 12 volt battery. I will be using the battery to run D/C lights, so I don't need a A/C power inverter. Do I need to get anything special to hook up between the solar panel to the battery to charge it, or do I just run the wires from the solar panel to the battery?


6 Answers

  • Amy
    Lv 5
    10 years ago
    Favorite Answer

    You should geta charge controller to keep the battery from overcharging and to keep the panel from discharging the battery at night. Something like http://www.altestore.com/store/Charge-Controllers/...

    Source(s): AltE Store - http://www.altestore.com/store/
  • 5 years ago

    You should buy a small charger from Harbor freight, you can not control it with some kind of small charge. small 10-20 amp charger can be bought on e-bay or amazon for about $15.00. At 2.5 amps from your solar cell will take forever to charge, A few tricks or common sense- Charge your battery with a car battery charger before you put the solar cell on it ,then do not let it go below 20 % i.e. 12.5+ is full charge dead at 10.5 volts so keep it about 11.5% or higher-this can be accomplished ith a half decent charger controller.

    I started with the HF 3 x 45 watt panels,then I added two more sets for 9 panels and still only had about 135 watts total at 7-8 amps.

    I am buying full 45 watt panels now-I have 18 of them plus my Harbor freight set up for a total of 900 watts @ 50 amps I can charge just about anything now.

  • 3 years ago


    Source(s): Create Home Solar Power : http://SolarPower.duebq.com/?Wsr
  • 10 years ago

    You will need a voltage regulator to prevent prevent overcharging the battery and consequent damage.

  • How do you think about the answers? You can sign in to vote the answer.
  • DrDave
    Lv 7
    10 years ago

    About a 5 amp 13.8 volt zener diode

  • Anonymous
    10 years ago

    you should get a charge controller also, it will keep the panel from overcharging the battery

Still have questions? Get your answers by asking now.