HUINE 20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode)

This works well I have had it running a 12volt fueling station for several years now without issue.

Can't tell you about its water resistance capabilities because I'm using it inside a small enclosure I built for my two generators; one is a regular 10,000 watts generator and the other is 4,500 watts inverter generator. Both are electric start capable, so they both require battery power. The issue with the batteries is that they can lose power quickly or get damage by just sitting around, or if they are not allowed to return to a full charge state after being used. I'm using this HUINE 20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller to keep both of the generator's batteries fully charged and ready just in case an emergency. The charge controller is connected to a 160W 12V solar panel and, so far, it has kept both batteries fully charged, without any evident of an overcharged condition. The LED lights provide indication of the battery power, solar panel power and/or an attached load. One thing that users must be aware of is that this charge controller does not have a provision to shut the power off to the load side. So, if you're not planning to attach a load to the controller, you should either tape the wires or use wire caps before connecting batteries. Anyway, based on my results and low price of this charge controller, I recommend it. It has worked flawlessly up to this point.

This looks like a fine unit, small and well made. However, it CANNOT be used when Lithium Ion, LiFEPO4, NiMH batteries. This is not explicitly called out in the description but is in the instructions you'll receive. Purchase knowing what you can and can't change.

for the money this is the best little solar charge controller. installed outside for summers and works perfectly

I’ve Had a for a few weeks to use with a solar maintainer panel I use for an outdoor shower that I need to keep a battery charged for an rv water pump. I tried just using a solar maintainer with built in controller but ruined 2 batteries in a matter of days. Bought this and everything is working fine now. It has lights that light up to show connectivity. I like that I did not have to try to jam wires into a small hole to connect to controller like other controllers I’ve used. Easy quick set up. Done in about 10 minutes.

Lasted for 2 years before giving up the ghost. Was used in the NorthEast, inside an unheated garage, up towards the rafters, not very extreme conditions. Will be looking at a different manufacturer for a replacement.

How many times have you had a riding mower or four wheeler battery go dead from non-use? Using these to keep a riding lawnmower and four wheeler charged over the off-season. Had a spare 50W solar panel and put it to use with this. Split the output of the solar panel to two of these. This is the second year now and the batteries have not failed.

Incredible little charger. Tiny, great quality and powerful, does what it is supposed to do. Recommended.