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So long as the controller produces a slightly higher voltage than the battery, it will charge the battery. A diode can prevent reverse flow. You may need something to prevent overcharging of the battery. The presence of a cigarette lighter plug is just a method of connecting the wiring. If everything else is good, it will present no problems. You can buy cigarette lighter solar panels on Amazon.

• This reply was modified 10 years, 11 months ago by Pippi.
• This reply was modified 10 years, 10 months ago by Pippi.

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