10A PWM Solar Charge Controller Waterproof IP68 12V 24V Solar Panel Controller Regulator for RV Caravan Boat Solar Panels System (24 Hours Working Mode)

I have had this unit for four years and it works great for a basic charge controller. I mainly use it with a old Kyocera 40W panel. Just a PWM controller, not very smart, it works well with AGM and deep cycle batteries.I noticed at least one review complaining about voltage output and you need to know you must hook a somewhat charged battery up to the battery leads first. Then to the solar panel If you do not it only outputs about 2.1v. When first connected to a battery it figures out the voltage (12/24) then works fine.

I use this to regulate the current into a bank of 2 ea 12 v batteries in my RV from a 15 W solar cell. It has performed very well in an outdoor environment for the past 8 months. Keeps the batteries charged without overcharging them and boiling the water out.April 2022, After just over a year of use the device stopped working.Update: The device stopped working because the solar panel was covered in oak pollen, after I cleaned the solar panel and the operation returned to normal.In the meantime, HUINE had sent me a replacement. Great Customer service!

Everything was working great, but the middle light is not visible in the sun, even after covering it. The seller did get back to me. They suggested rewiring, and then the last sentence stated another customer complained that the light is only visible in the shaded. It would be nice to add this to the instructions.

The media could not be loaded. Winter of 2021:One unit has been at 2000 feet above sea level on mountain here in Alaska. It appears to have survived the winter with temps dropping down to -30 F but the system did fail at some point. When I got to it the solar controller was off and the battery voltage was down around 2.5 volts. I brought it home and the battery gained up to about 5 volts at room temperature. I don't know if the battery froze first or the controller failed and then the battery froze. That was with a 30 watt panel and 9 amp hour battery. The controller appears to be operating normally once a fresh battery was applied.Spring 2021:Now it is mounted to the rear of a 50 watt solar solar panel which is wired in parallel with a 30 watt solar panel for a total of 80 watts of power. It's charging a 35 amp hour sealed lead acid battery. The load side is run to a Retevis RT97 radio repeater which draws 70ma when idle and 2.5 amps when transmitting.Update 1-11-2022:Up to this point the system had been running with no issues. The system went offline on December 20th 2021. It shutdown during a transmission with indicated to me that it reached the low voltage cut off of 11.2. I expected it to come back back online after a full 7 days of sun but it never did. I tried to get to the site to see if I could see exactly what the problem was but I am unable to get to it until the spring. It is possible the RT97 failed, I find it unlikely as the transmission was short. When it shut down the temperature was about 20 degrees F. The following week the temperature dropped to -15 degrees F. It is possible the battery froze but I find that unlikely. The battery is underground where it should be near 10 degrees F and shielded from the -15 degree temperatures.I conducted an experiment and discharged a SLA battery to 10.5 volts which is well past the 11.2 volt cut off. This should make that battery more prone to freezing. I put that battery in a 0 degree environment and after 12 hours it is still holding at 10.5 volts. That battery has enough power to operate one of these charge controllers. I put that back in the freezer and will monitor it for a few more days.I took a spare controller and ran a quick test to see how it reacts to voltage dropping down to near 0. I would assume when a battery freezes the voltage drops out. The charge controller will run on low voltage all the way down to around 3 volts. Below that it turns off. As the voltage rises back above 3 volts the controller turns back on and cycles through it's "self test". If the battery did freeze, it could shut off the controller, but once the battery thaws the controller should come back online. We have been back to 20 and 30 degree F temps and I would have expected the battery to thaw if it had frozen on the -15 degree days. If any of this changes I will update further.I admit that for normal use in an attended environment these controllers seems to work fine. It is definitely not temperature compensated as advertised though. I see no changes in the charge voltages from 75 degrees to 0 degrees.

This little guy kept my trolling-motor-powered dinghy charged for 2 summers from a 35W panel, sitting exposed at the dock in the salt air, rain, and fog. Now I have a lithium battery, so its new job is to keep my boat's house bank topped off. I never used the load output so I can't speak to it.

I've used this for less that 6 months to charge a battery pack I built. It worked briefly, while slowly discharging my battery. After not using it for a couple of months, I decided to try and charge my battery again and I am now only getting about 2.1v output to charge, when I have 18.4v as the input voltage and that is no where near enough to charge my battery pack.

Used as the charge controller for soar lighting system in my shed. Simple system, the charge controller, small solar panel, battery and two Led RV lights. Working great, keeps battery charged well.

I guess you get what you pay for. I purchased this to be a small home built charge controller to charge our battery for our electric fence battery. It was attached under the roof and not directly exposed to rain or weather. It was outside. It just suddenly stopped working. The solar panel and battery that were directly exposed to rain/snow/ice are functioning properly. I decided to replace it with another cheap 'waterproof' controller. I do not think the wires are properly sealed against any moisture.