Schumacher SP-400 4.8W Solar Battery Charger / Maintainer

This item works well and puts out quite a good amount of electricity even in non ideal lighting. You'll want the charge controller with this one if you intend to use it as a constant 12V battery trickle charger. I think this large one has the ability to overcharge, especially on very sunny days. The charge controller will prevent overcharge.

This item has been multi purpose. I use this was a battery maintainer of my motorcycle and my lawn mower, charger and set up as emergency charging unit. I have configured this pannel charging for cell phones, charging the battery for a Ham radio(s). This unit also works well in vehicles, just place on dash, plug into the lighter plug and power the car radio with the key on and or use to charge the battery.......

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Can't say more than that, it does what it is suppose to do and keeps the battery charged. No more worries about dead battery after long periods of storage. Wouldn't hesitate to recommend, but get the controller to avoid batter burn out.

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Had this solar panel for a month now. Using it with Schumacher SPC-7A Solar Charge Controller to help keep my riding Lawn mower battery topped off. Have the Panel just sitting on a window with the blinds holding it in place. So far very good.

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This device did not provide a battery charge used with a Schumacher Solar charge controller. There is no real good way to test or check the unit for proper operation. A fully charged dual battery on a Silverado truck still discharged as before using this solar charger