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26 of 26 people found the following review helpful
5.0 out of 5 stars More Than a Charge Controller! This is a Load Controller Too!, June 21, 2017
By 
Jeffrey Rash (Kingman, AZ) - See all my reviews
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This review is from: docooler 10A 12V/24V Solar Charge Controller Solar Panel Battery Regulator Safe Protection (Electronics)
This little charge controller has already been through a tough North Dakota summer- and is still working great!

I thought for sure I was going to have to build a weatherproof enclosure for this as the sides are open for ventilation. I figured dirt and rain would have this system of the fritz in just days. But since this was an experimental system for solar powered pumps, I figured I might as well sacrifice this inexpensive controller to see where the limits are.

To my surprise, the system has been wet, dirty and shocked hard when the 2X4 it was attached to fell over in a rain\wind storm. So far, it still works perfectly. It appears there is some sort of coating on the circuit board that insulates it from the environment! Whoever built this understood it's a field unit and designed it accordingly.

The screws on the base can be tightened very tight to hold wire connectors securely- without stripping or breaking the device. The screws are made from... Read more
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3 of 3 people found the following review helpful
4.0 out of 5 stars Dead output in 7 days, February 10, 2016
Verified Purchase(What's this?)
Stopped working in 7 days. My project consist of a 12 volt 5 watts solar panel, a 12 volt 7 amp battery, a 12 volt to 5V/2A power supply and the Docooler Solar Charge Controller. The load output worked sometimes, when it did my battery gets a full charge during the day, and supply my power supply during the night. However the controller NEVER show all 3 LEDs indicating full battery ( I tested the battery using a volt meter). Now on the 7th day all 3 LEDs stopped working and 1 to 2 volts on the load output. I then tried using it as a 24 volt setup, I got a 24V load output but still no battery level indication.

UPDATE: I received a faulty one so the seller sent me a replacement and now after almost a year the replacement stopped working. No voltage on the load output.

The seller quickly send a replacement but took a while to arrive because it came from China. It is working perfect, I guess I just got a faulty one the first time, I will upgrade to a 20 amps soon... Read more
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1 of 1 people found the following review helpful
2.0 out of 5 stars Good for your first solar project, but all those lights are quite random (Updated), January 6, 2016
Verified Purchase(What's this?)
Update, Jan '16: I briefly shorted the wires attached to the load on this unit and it no longer functions at all. I disassembled, expecting to see a fuse or something but nothing. My fault. Use a fuse, or be careful. Lowering rating to two stars.

We were shipped a basically generic product - it says 'CE' and 'CMP12' - no Docooler branding like the image here. We attached a 22W solar panel and a 12V 7AH motorbike battery to it. The brand-new battery shows two lights (ie medium charge) and the 'charge' light comes on when it's sunny and goes off when it gets dark - looking good.

The strange thing is that the 'load' light is always on, even though there's nothing attached to the load outputs. It will always be on as long as you have a battery attached. Basically this light has little meaning other than indicating that the unit itself is functioning, and/or acting as an extra battery light.

While we were yet to attach a load to this unit the battery lights... Read more
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