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Questions & Answers
i think the 8 gauge would be too big for these terminals i used 12 gauge fork terminals they are pretty close together
By lester yarbrough on January 11, 2018
Get one of the more expensive units. You truely get what you pay for with these things, mine crapped out in about a month.
By Anthony on June 19, 2018
An inverter will likely exceed the rating of the load output of this controller. However, you could connect the inverter directly to your battery. But the load disconnect feature of the controller will have been bypassed and won't be able to protect the battery from excessive discharge.
By DaveR on June 8, 2018
The 12 Volts can with the controller, but not the 24 volt, it exceeds the capacity on the charge controller of 12 volts
By Victor C. on May 6, 2018
That is a light indicator for telling you the light you have connected is drawing power
By John meyer on April 28, 2018
No, you need at least a small battery. The reason for that is because this is set-up to run 12 or 24V systems and the first thing you should do is connect a battery which allows the controller to detect it's power and "auto-adjust" to the correct settings. If you just connect up a solar panel (which may put out ~20V … see more No, you need at least a small battery. The reason for that is because this is set-up to run 12 or 24V systems and the first thing you should do is connect a battery which allows the controller to detect it's power and "auto-adjust" to the correct settings. If you just connect up a solar panel (which may put out ~20V but be intended for a 12V system), the controller may detect the ~20V power, auto-adjust to a 24V system and give you 18V+ when you expect ~12V. So it needs that battery to be a signal of what is wanted, without it the settings won't know what to do (and may reset each night when power is lost). Hope that makes sense. see less
By Thomas H. Lawler on May 3, 2018
Isn't weather proof need a plastic box
By Pete on April 9, 2018
That is exactly what the "load" terminals are for, they get shut off when the battery gets to 10.5V or such (so the battery doesn't drain to 0V which OEMs say "just one time draining it to 0V can ruin a battery").
By Thomas H. Lawler on April 3, 2018
The manual for this controller says "All voltages need to be the virtually the same for all of your system" so if you have solar panels putting out 24V+, then the batteries connected must be ~24V (like the 2 12V in series) and any load on the "load" connection must be 24V. You don't want to connect up a 12V battery an… see more The manual for this controller says "All voltages need to be the virtually the same for all of your system" so if you have solar panels putting out 24V+, then the batteries connected must be ~24V (like the 2 12V in series) and any load on the "load" connection must be 24V. You don't want to connect up a 12V battery and have solar panels putting in ~30V+, the solar panels for 12V should be ~20V or less. If you want to switch between system, then you should disconnect everything and reconnect them in the same order instructed in the manual (first connect batteries allowing it to detect what system you'll have, then connect solar panels & load). I personally would not switch constantly and would just buy another controller for the minimal $10 leaving each one set up for each system. see less
By Thomas H. Lawler on April 3, 2018
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based on 204 Customer Reviews
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December 23, 2017
It may be too early to write reviews but this review is just based on my initial observation. So far it worked as described without going into technical details. I think the setup is good for an in-expensive regulator. Instructions, clear. I like that it has a battery power indicator (3 LED's). Four star is because at night the LED lights are still on. it doesn't consume much power but still consumes a little even without a load. I have a harbor freight regulator on one of my setup and all the LED's will turn off at night (means no charging from the panel). This is just so inexpensive to pass up and try. After discounts on HF this is still about 9 bucks cheaper. If everything goes well, this will be a good solar car battery maintainer with a minimum of 15W panel. My setup for this is just a regular car battery, a 50W panel laying flat on top of my sunroom, wired with low voltage 12g wire and a 300w inverter (kinda like a UPS). I use some of the stored power just to light up my computer desk using 12v car LED lights. My other setups is another story (like you!-a mad DIY scientist). It did help power my Uverse UPS for modem and phone for an extended internet access, when the power went down.
December 12, 2017
Gets the job done. It would be smarter if its LED indicator lights shut off when the solar panel is not charging but constantly on lights are only about the same current draw as a vehicle has with the ignition off. So with a good battery its not a factor. I hooked the device to a 4.4 amp 12volt (0 to 17V) solar array and a large deep cycle battery. The load is an industrial computer fan with enough air power to dry out my shed floors after our never ending east coast storms. When not in the shed the fan circulates enough air under my home to avoid musty odors. My other battery system charges batteries that run some indoor/outdoor lights used year round. My wife stopped bitching about such "toys" after a week long power failure (hurricane Sandy) when we still had UPS power and lights well after everyone else on generator ran out of gas. . My unit worked out of the box, was pretty easy to hook up/test, and with a little Velcro easy to mount to a fire resistant surface. The load and battery voltage was stable in full sun. Its unclear if it has any fuses so I added some in line fuse holders/fuses for safety. If the unit stays working I will give this 5 stars... so far so good.
December 8, 2017
Works fairly well. Draws ~13-18mA depending upon voltage off the battery constantly. ~3mA of that is in the LED's (depending again on voltage) and the rest is just running the on-board electronics. I also wish the battery status led's were a) dimmer or b) turned off at night. I adjusted the internal pot so that the LED's turned on/off at more useful voltages (12.9V, 12.0V) The lowest LED cannot be adjusted (~9.2V). The unit will automatically disconnect loads at somewhere between 10.5-11V (which is nice for preserving standard chemistry batteries). Can't beat the price. Nice internal heat dissipator for the power electronics with proper thermal interface material. Nothing fancy but pretty well made.
By Cosmos Joseph
October 19, 2017
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. The red LEDs indicating how much charge the battery has are very bright but they don't bother me, they actually gets brighter (one by one gradually) as the battery receives charge, so I can say I can "see" my battery charging.
August 16, 2017
I needed a cheap controller for a small solar panel and this one fit the bill. Initially I had an issue withe seller sending me the wrong product but they sent the right one out. Shipping took forever from overseas (wish I knew before ordering). The charge controller is fairly small and simple. It gives you a quick glance at state of charge for the battery, if the panel is charging, and if there is a load on the battery. Simple and effective. I almost like this one better than my other controller for my larger solar setup. This one is easy to use and straight forward. I love it.
By A. M.
July 23, 2017
I did a bit of research on these, CMP12's (10amp), There are many verities, i figured i would get the newer one with the good heatsink good potentiometers and a crappy micro fuse, but i got a totally different one, with micro potentiometer, the upgraded heatsink, and the original auto breaker(instead of the fuse) SO I'M REALLY IMPRESSED! I will update after i hook my 80watt panel to this and run it over the next camping trip (probably get back to the review in june) If it turns out well i'll post pictures of mine without the case so you can see what i'm talking about.
July 21, 2017
I've bought 2 of these. The first one from Yueton kept supplying over 1 amp to the battery when the voltage was 14.9. The charge light was solid, not flickering at all, just over charging the battery, you could hear it boiling. I'm sure 1 of the 3 potentiometers are not set correctly. I think I'll reverse engineer it and fix it. This Anself unit on the other hand works very well so far. The charging voltage for AGM and SLA batteries is 14.4 - 14.9 volts. This units charge light began to flicker at 14.5 - 14.6, that's a good thing. Many people are also confused about the load light. They think the unit is broken because it's lit and they have no load connected. Not how it works at all. The led will be off ( load off ) if the battery voltage is too low. If its on, you can power a load, that simple. Since I bought this the only problem I have is that they've raised the price before I could get some more. Good product at a great price.
By Matt Piekarski
July 21, 2017
I highly recoment this product. Heres why: I had a project set up to run on a small 12V motor cycle battery. My project had a small light run all night while it was dark. After the first night the battery was over dead (not damaged) . Turns out solar panels draw energy at night/ when they are no receiving enough light to put energy in. In short this is an overpriced diode, BUT I recomend it, because dispite the fact you could fix that issue with a couple diodes this is nicely set up. You have a point where you can trouble shoot what is and isnt working on a project. At the connection bridge of sorts (I am not sure what its called). There are 6 terminals +- for solar, battery and your project, because of this simple design it maybe took 10mins to instal. It also has a battery level to let you know where your battery is sitting at (with 3 leds. 3 red leds= 14-14.4V. 2 red leds =13.9-12 and 1 red led=11.9V and lower) I have a volt meter along side this, as it was already part of the project before this came along. When a new project comes about I can take it out and still have an idea on my batterie's level. Not needed for solar powered projects, but nice to have.
July 12, 2017
My cheap-o 7A controller disintegrated over time, like it was made of paper, and I needed a heavier controller anyway for my additional panels. This one is doing it's job quite well, no reverse feed at night, very little loss from panels to batteries, and the addition of contacts for LOAD are really nice to have! So far, I have zero complaints after two months of use. EDIT - 4/14/2015: After using this charge controller for a year, it is still doing its job well, but not as well as it was last year. The output Voltage last year was 13.3V, and now it is pushing 12.8 on the average day. This is still sufficient to maintain a full-charge on a vehicle's battery, but not nearly enough to efficiently charge deep-cycle batteries in a solar bank. Dropping to 4-stars
By James Alan Olmstead
July 6, 2017
This doesn't matter if you disconnect the charge controller after charging completes; but, either this model does not have a blocking diode or mine is broken, because my "conected" leds continue a weak glow after I disconnect the solar panel. I have ordered a second controller to test this problem; but, in any event, this is a great little package, especially the prong connectors and plastic shield cover. Those who complain about the "load" circuit not working probably do not know how load circuits work (only when there is no solar panel and/or when battery is fully charged). Check two controllers to verify before returning as defective. You need two for a backup anyway, so quitcherbit**in about buying a second one.
By Josh Clark
June 14, 2017
I was using the charger controller that came with my solar panels. It was one of the cheap ones with 2 DC connector jacks on each side. However these went straight to the battery and had no way to turn on/off the load to prevent over-discharging. I wanted this feature because I noticed that the lights on my shed would become very dim in the winter days due to less daylight and longer runtime (lights turn on at dark). And the battery would be discharged to about 6v. So I figured, when the voltage hits the low threshold, the controller will shut off the load for one or two days until the battery is recharged I found this one on here advertising over-discharge protection, so I took a chance. It turns out, I didn't even need the over-discharge protection. My old controller was just not charging the battery as well. The days are still short, but the LED lights seem to stay bright. I haven't tested to see if it shuts off or not, but I assume it would. Some other notes about this charger: - The construction does feel a little cheap, but that doesn't seem to affect performance. - Charges the battery better than the free/cheap controllers that come free with panels. - The instruction manual has terrible english, but is understandable. - You must connect the battery, then the panels, then the load. This is so that the controller knows whether you are using 12 or 24v.
April 19, 2017
Great little controller for my project. I use this to maintain the voltage on a old truck battery. From there I run 6 4.2 inch computer fans to cool 3 grid-tie inverters on my solar panel arrays. It took about a week to bring the battery up to full charge and go into float charge mode. I run the fans off the "load" terminals, I would have preferred that the load output turned off when the sun no longer powered the charge controller but it provides power to the fans 24/7. It doesn't appear that there is an adjustment for the "load" output. In my case it doesn't matter, the 50 watt panel used with the charge controller keeps the battery up, I haven't seen it drop below 12.3 volts after running the fans all night.
By Jeffrey Rash
April 11, 2017
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 plated metals to prevent corrosion and the base where the screws attach to is metal too. No worries about breaking this device with field use when you really need to torque the wires down hard. This has hard metal where it counts! The unit comes with two open holes on the side for screwing it onto a piece of wood. (Or you could even tack it on with a nail.) The drawing for connections is universal and obvious. If you can put in a car battery, you can install this with a solar panel and batteries. As to it's ability, I paired this with two recycled 8AH 12V Sealed Lead Acid (SLA) batteries. It does a better job charging these than my expensive battery "conditioner" that's 20 times bigger and heavier than this controller. It's meant to be paired with a solar panel and if you are looking for its match in ruggedness and price, check out the ECO-WORTHY 20 Watts Epoxy Solar Panel I reviewed. I got really lucky and found two very inexpensive systems that were both ideal matches for my tough applications. If you are looking for systems to use outside in a garden or farm environment, I recommend these two systems! Put the Eco-Worthy 20 watt epoxy solar panel (crazy tough- I seriously abused mine and it looks brand new,) with this controller and keep any small scale battery array or starting batteries fully charge all the time. Auto-detects 24V and 12V battery arrays, measures their charge state and decides to charge them when their is excess power. It also supplies the load with the solar cell when their is excess power and it won't let the batteries discharge below a recommend state while powering the load! That means it powers the load from the batteries at night and will turn the load off once the batteries reach their discharge point. So this is much more than just a charge controller! It's a smart load controller too!!!!! Great for fountains, security\gate systems, outdoor video, cars\trucks\tractors\mowers\motorcycles\ski mobiles or any other vehicle that will sit a while and needs to have it's battery charged. My application is for a small 12V water pump in garden. (Think small waterfall pump.) 350mA continuous water pump 24X7. Still going strong after a months use!
By CDP's Onceagain habit of purchasing
April 8, 2017
I'm setting up a battery system and an inverter to power some AC devices at my dock and this will control a 50w solar panel to charge up and power a couple marine deep cell batteries. Will connect a light to run for a few hours every night to give the system a load so the solar cell can recharge daily. When charging is done, I'll run the light for a few hours while it is still light then into the evening for collecting bugs near the water. Should attract some minnows and fish. We'll see how that works. This Patuoxun 10A 12V/24V Solar Charge Controller Solar Panel Battery Regulator Safe Protection seems to work for my system and will hide in the storage box under the solar panel facing southwesterly.
April 7, 2017
Seems to be working just fine. See people complaining about this killing batteries when still attached to battery and put into storage where there is no light. It does have 3 LED lights that will continuously stay on to indicate battery charge level.. Not sure if thats strong enough to nuke a large battery eventually but I suppose its possible. The smart thing to do, is add some male and female quick disconnect connectors in between all your wires so you can disconnect the battery from the Charge Controller when storing. You should always disconnect form this device when charging from a different source also. Just be smart and you wont have the problems you see on the 1 star reviews here.
June 1, 2018
By Howard W
January 5, 2018
By Wallet hunter
October 31, 2017
Lasted 2 years and 3 months in my ~20W/12V installation in a remote shed. Had it connected to two 5Ah SLA batteries. Thought one of the batts had a short internally, but confirmed the regulators in the charge controller are bad based on that. Only Charge LED is now lit. For $10 idk what a person should expect for reliability in a product that survived 2 Wisconsin winters.
April 12, 2017
I've had it for about 3 months and don't use it daily. I have mainly been using it with a 10 watt panel to charge my daughter's power wheel car. I did have to put a blocking diode in line from the panel as there was some current flowing back into the panel. I don't remember where I read thos information, but always make sure the solar panel is disconnected if there is no battery. If the panel is hooked up without a battery it can damage the controller.
By L'il Greener
April 5, 2017
Hopefully it lasts, but combined with the solar panel, it kept my Lund boat battery topped up tho it rained solidly all summer. And I bought the same control system and solar panel to trickle charge our boat battery in St Croix, USVI as it is always discharged when I need it.
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