Solar Charge Controller 20A 12V/24V PWM Auto Paremeter Adjustable LCD Display with Dual USB Load Timer Setting ON/Off Hours Solar Regulator

Do yourself a favour and get a proper charge controller. There are many small ones which share this design and they're all about the same, although for different prices. These ones are moderately accurate and offer a bit of protection for your battery, but as per the title they're cheap tat and will die quickly, possibly risking your battery. I paid £20 for this and after a month what I have is a wire.. it still conducts but all of the functionality is dead.The USB ports never worked from new.

It doesn't stop charging at the set voltage. That means it can eventually boil your battery!It can only match the PV voltage to battery voltage by direct connection, there is no voltage conversion. How do I know? The only inductor inside is a little one for the USB charger. To be fair, it doesn't claim to be MPPT so that's OK.Also the numbers shown on the panel are strange. It is measuring something, but when I compare to multimeter measurements I cannot tell what. It says 5.5 Amps going into the load when no load is connected, but 5.5 Amps were going to the battery. It says 19 Amps are coming off the PV, but that's just wrong.So what's it doing? Eating 14mA all the time, and connecting the panel directly to the battery the way you could with a connector block. Useless.This one sat on my bench too long to get a refund.Edit to add: if you connect the PV when the battery is absent, it may conclude you have a 24V battery (until next power cycle?). The animations on screen suggest it did try to stop charging the battery at the voltage I told it, but it failed to open the circuit. Instead it dropped about 4V across its internals and 4.5A continued to flow. The temperature of the device went up to 53C and it continued to over-charge the battery.There was a funny smell. I disconnected it when the first wisp of smoke came out the top - extra photo shows discolouration of the thermal pad. Maybe I should have left it longer for a more impressive photo?

Charges my batteries which is what I wanted. Nice and easy to set up but not entirely sure what all the buttons do and got no idea what the 24h clock is for. No I havent read the instructions nor will I for I am a man.

I purchased this controller some months ago. Running a 120 watt solar panel with it, which in turn powers my pure sine wave inverter from my 3 90amp leisure batteries. The controller seems to be working great and has nice features on it. Such as timed load and even a load when it gets dark and turns off at dawn. Good for lighting in the garden ect. Its very simple to set up and connect to a solar panel. All the settings parameters are adjustable, so easy to set up for what you need. Glad I got the 50amp version and not the smaller one as it has a nice heat sink on the back and never gets hot, as the solar panel is only producing just under 7amps. I also have a more expensive controller that does not have as many features as this one. So for the money and for what it does I can recommend this controller for a set up like mine.

Click one star and it won’t post so click 5 and it will. DONT BUY THIS ITS RUBBISH

This is very easy to connect up, it then just depends on how tidy you want your wiring. Me, I'm not too bothered. I'm using this to regulate the charging a 12V 4.5Ah battery that I'm using to power a fan to help ventilate my summerhouse. I've got 2 10W solar panels set up on the roof of the summerhouse. Controlling the time the fan is on is very easy. Therefore the timings can be varied through the year, as the battery gets more charge.

I bought this because I wanted a, reasonably cheap, solar controller that would display charging current and cumulative charge. All the 10A, 20A and 30A controllers I could find did not have this information displayed. Therefore I ended up buying this 40A controller. However, when connected, the charging current only started to be displayed when it was over 0.3A. This was not accurate enough for my requirement.

USB only puts out at 3.6v not 5v so no good for powering or charging anything