SUNER POWER12V 50W Solar Battery Charger Maintainer, Built-in UltraSmart MPPT Controller, Adjustable Mount Bracket, Waterproof 30 Watt Solar Panel Kit for 12 Volt SLA Deey Cycle AGM Lifepo4 Battery

works great

Purchased 2 for my Utility & Dump trailer 30W chargers, but have yet to install on my trailers. I've been using them on my lawn tractor, Zero turn and log splitter for about a month now to maintain the batteries and I'm pleased with how good they work. They are easy to move from one to another by just unplugging from one and re-plugging to another. Seems to charge well enough even on cloudy days. They are keeping my batteries at 13.4v to 13.6v. I've decided to purchased 50w chargers for my dump trailer because I want more charging capacity for the larger batteries because the batteries are discharged when in use.My only complaint is that it would be nice if the adjustable angle mechanism had a spring loaded de tent (like on a walking cane) instead of the bolts and wing nuts for angle adjustment. Also, would be nice to have a long and narrow panel to accommodate location under the header of my dump trailer. Wattage size of 50w to 100w with a length of about 5 foot and a width of about 12" to 16"

The first panel I ordered malfunctioned a couple of days after hookup. Apparently the black glue used internally in the charge controller melted and began running down the panel like Hershey’s chocolate. I contacted the company via email. That was funny because the rep used a very American name, Mason, but the communication style and verbiage in the notes was definitely Chinese.Anyway they sent me a new panel out at their expense and it seems to be working correctly. One warning about the wattage size. I had hoped to use this to keep two 6 volt heavy duty golf cart batteries wired in series to equal 12 volts charged.. In full sun it can barely keep up. It fails once you draw any voltage in the trailer for refrigerator, lights, etc. That’s my mistake n not estimating wattage needed for the application. This panel will probably work great for keeping a standard smaller 12 volt like a OHV or boat battery. The company does stand behind their product.

Bought it mid November to keep my pickup charged while away for xmas. My previous one 10w sometimes struggled to keep my battery charged if weather inclement.I installed it checked it's output. All seemed good. Parked the pickup with the panel on the dash in Florida.Came back yesterday to a total flat battery. The battery was new (3 months). Checked the unit and it has no output. Very disappointed. Used once and it died, of course no warranty, its now 2 months old and used once.UPDATE!Due to pressure of work I did not contact the company or amazon to express my disappointment.HOWEVER, the company must check their reviews and contacted me out of the blue. After replying to their email concerning technical info etc. They have now sent me a new F.O.C. panel which I plugged in this morning and is now working fine. As far as I am concerned this is great service, and going beyond the call. I'm very impressed in them checking reviews to make sure their customers are happy and contacting me when they realized my disappointment immediately. Thank you Mason and the staff at Sunpower for solving the situation. Incredible aftersales service!

I mounted this solar panel on two short 2x4's, which I then screwed to a tree. Very sturdy design!

My lawn tractor was always iffy starting slapped this bad mama jama on and starts stronger

Worked out of the box. Then stopped keeping my battery charged as soon as I secured it to my trailer. Which meant during my 2 week trip I had no ability to use my water pump or horse electric fence. Horse got out in flagstaff,az. I am immensely disappointed. But, I did find the horse 2miles down the road. Wish the fence had been able to be energized as I traveled across the country

Love these little MPPT panels. I Use this small panel to charge my kids power wheels garage. A Green EV solar Station. It works great and the SAE connectors make easy plugs for toddlers.