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    1. · Banned
      Corolla, Camry, Tundra, Camry, Avalon, Highlander, Venza, Highlander
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      4,331 Posts
      I run 5w-15w solar battery chargers/tenders and never had a problem. They need to be wired to pretty much ANY positive/negative continuously on wiring, or directly to battery....

      If someone burned a vehicle to the ground, then that fool did something wrong. Military.. genius... hahahahaha oxymoron!

      I've had a few cars have them connected permanently, along with boats, rvs, motorcycles, watercraft... over the years. Never had a problem.

      Never connect solar panel directly to car wiring or battery. You must use a charger controller. This prevents the battery from overcharging. And, it prevents the panel from killing the battery at night(panel is a resistor at night and pulls power).

      For example:

      I can build my own kit for a lot cheaper with used locally found panel or one from harborfreight and any ebay/amazon 12v mini solar battery charge controller.


       
    1. · Registered
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      615 Posts
      Bumping this old thread due to Covid and people working from home. Anyone use/using the cheap Harbor Freight 1.5 Watt Solar Battery Charger? Or is it better to spend a little more for a similar (no name Chinese brand - like this one) from Amazon? Does one really need to use a separate (additional cost) regulator (HF example regulator) with these cheap solar chargers like some do/suggest, or can the cheap solar charger be left attached to the battery full time till driving the car?
       
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