XINPUGUANG 2pcs 100w Monocrystalline Solar Panel Flexible 200W 12V Solar System kit Photovoltaic Module Cell 20A Controller PV Connector for Home,RV,Caravan,Boat and Other Battery Charger200W

Intalled these on the hard top of our boat to charge our music system batteries (2 -10" subwoofers, 6 speakers and 2 amps) These work so well on sunny days that we only use power generated from the sun keeping our 2 batteries fully charged!! So worth it!

I have not installed any solar products before and was very apprehensive about it, thinking I would have to have the system installed at a great cost. I especially didn't want to drill a hole in my RV roof. However, after measuring carefully I found the best spot to drill near a vent and did so, and was able to run the wires down the back corner of a closet and into the battery storage compartment. From there it was easy to go up the wall to mount the controller, using wire channel all the way down the closet and up the wall. Fastening down the flexible panels was a bit tricky with butyl tape, but it all worked out great. I have a steady 13.8 volt charge on the deep cycle battery, which is enough to run my small refrigerator constantly. The controller that came with the package does not get hot like was mentioned in the product info.

SEE UPDATE AT THE ENDI understand that flexible panels are less efficient than rigid panels' although I expected more than half of the rated 200 watts.I upgraded to an MPPT controller with an app that tells me all sorts of info about the battery and panels in real time, and at the top of a sunny day with the sun right overhead in optimal conditions I'm showing a 98 watt charge.UPDATEThe first set of panels FAILED after 3 months, so I contacted the seller and they sent me a new set which I painstakingly removed the first set and installed the second. Still only got HALF of the rated power ( ALL XINPUGUANG panels only do half of rated), so if it says 200 watts it's only 100 watts.After exactly a year (which happens to be the warranty 1 year) the second set also failed, and it happened gradually. Contacted XINPUGUANG again, and after trying to blame everything but the panels they pointed at the warranty and told me they would not help me and I'm on my own and stopped correspondence.

Works as advertised! Great deal, charges, even in low light, stormy conditions,The charge controller works, the buttons are kinda particular.The only thing I don't like, ( but for the price ) the charge controler has lots of custom features- however does not show the voltage coming from the panels. Just the battery voltage. You can also see, discharge,charge settings. The only reason it did not get 5 stars.But the settings are customizable.

These are older style panels that have a very cheap feeling. It's very thin, but in a bad cheap way. It is also insanely glossy. The nail in the coffin though is placed next to 3 other panels from amazon that are all in the same price range it produced 46 watts compared to 54 and 56 of the competitors. The components of the kit (the charge controller and cables) are actually pretty nice, and the other panels did not come with them for the same price. But at the end of the day the longevity and production of this panel is not offset by the extras IMO.