Sunforce (58022 6 Watt Coleman Solar Panel Battery Trickle Charger

I use this solar charger for my boat battery it keeps battery charged all season.

I really like this solar panel. I am using it to keep the 12 volt battery charged up on my 1970 VW Beetle. It sits a lot, and seems to drain the battery fairly fast, so that is why I purchased this unit. I have placed the panel on the rear deck on top of the speakers. It gets several hours of direct sunlight each day. I read a lot about solar panels and if they needed the voltage regulator (or similar hardware) to keep from over-charging the battery. All reviewers were of the opinion that NO, it does not need it because of its current output. I asked the question on amazon about the output others are getting, but received no answers. Mine is putting out 20 volts at about 6.4 amps. My heavy duty charger is only 15 volts output at 2 or 6 amps. I am following the directions of unplugging when driving the car, where others say they leave it plugged in all the time, driving or parked. I will say that when I turn the key, the engine cranks like it is a brand new, topped off battery every time! I may get another to put on my tow behind trailer to keep its battery at its peak. I have a tiny (dollar bill size) solar tender that seems to eat up its terminal clips quickly in the weather. I definitely recommend this solar panel. Its price compared to others is well worth the money you could spend. One thing on its construction, though. It is a square, aluminum frame. It has two pieces that are screwed (tiny bolts and nuts actually) on two sides. The hole appears too large for one, and was missing the tiny nut, letting the bolt roam freely in the box. Fortunately, it did not cause any damage.

I have had one of these for 2 years to trickle charge my tractor battery during the long spans of non use. It worked very well. The only thing I wish it did have is a led light to let me know if my connection is good with the cigarette lighter socket and is charging correctly.

I purchased this panel as a battery maintainer for our travel trailer when our old panel got broken. I attached the cables directly to the battery and have the panel mounted in an unobstructed sunny place. With nothing drawing on the battery at all, I monitored the battery voltage each week for a month. The battery consistently lost power, and then went dead altogether. (This was a new battery with no damage or exposure to hard freezes.)This panel is a useless waste of money, and of course, I find this out after the deadline for returns had passed.Don't waste your money on this one.

Realistically, this will take f o r e v e r to recharge a flat battery, but is excellent at keeping one in occasional use maintained. Remember that not all days are sunny and bright, so this seemingly-larger-than-you-think-you-need panel gives some margin over a smaller panel. Well built, works well.

This is my second coleman solar panel in two years and unfortunately both after a month's time had the same lower corner of the solar cell turn white in an area about 5 inches by 3 inches and looks like its not fully working as a result. It still puts out a trickle charge but is definitely not operating at 100% and is visible damaged from just the sun and rain. Being this is the second one with the same problem I would not recommend people buy this product. I gave it two stars instead of one because even with the damage it still puts out some charge.

Please beware that this product is listed as coming with a 9' 5' length cable and the actual size of the cable on the one I received was only 3 ft. long. This is way to short to hook up to my car and I had to place a second order for an extension cable which was frustrating. Had the correct cable length been listed, I could have ordered both at the same time. This is the first time I have had a problem ordering something from amazon. I believe that amazon or the manufacturer should make sure that the product information is correct.

Using this on a Kubota 3901 tractor in a barn with no power. I mounted it on the roof of the barn, after 6 months of no use, the tractor started right up. Would purchase again.