ECO-WORTHY30A Solar Charger Controller Solar Panel Battery Intelligent Regulator with Dual USB Port Auto 12/24V PWM Positive Ground for Lithium，Lead-Acid,Gel Battery

Awesome little charger controller and affordable. Display tells you a lot. So that’s awesome. Works well with my 12 volt battery solar system. I love it.

I used this with a 48v pv system that is rated at 1.2kw. Charging a 12v battery bank, the wires get REALLY hot. So make sure if you are charging a 12v system you have the thickest wires you can cram in those terminals. For 60 amps charging output, you'd need at least 6awg. However, I highly doubt that would fit in the terminals. I've been able to fit 8awg battery connectors in the terminals. Other reviews have mentioned 10, But when charging, the biggest size is best. 8 is probably the maximum.So this little charger works great for some modest 12v set ups, and slightly less modest 48v battery setups. Just keep in mind that lower voltage battery banks need more amps, and that little port can only handle so much.There is a thermometer that plugs into it. Maybe I didn't read the instructions, but I can't seem to find where the reading on the thermometer shows? Likewise after stress testing the thermometer with some heat, it doesn't seem to shut off or impact charging at all.If you are using a couple hundred watts of load on your 12v batteries, this does absolutely fine. Its a solid unit. If you are powering an inverter, be careful. Too much power draw and you'll cook the little wires that fit in the terminal.I believe this is capable of charging a 48v battery bank. That would be far more appropriate given the terminal sizes.

I bought this solar charge controller after going through a couple of cheap PWM controllers for the solar panels providing power to the battery in my woodshed (for lights and speakers). The cheap ones worked in the summer, but in the PNW winters, the charge controllers were not producing enough power to get my battery charged back up in the daytime. Plus the last one I tried was very inaccurate.This controller was a dramatic change. Nearly identical readings for the battery voltage compared to my multimeter, and the amps being produced matched what my clamp meter was showing.I was looking for an inexpensive controller that could use my two 100 watt panels to keep the woodshed battery charged, as well as showing the amps being produced and the amps being used. This controller fits the bill at the right price point. This controller is also programmable, as you can set the cutoff point for the load (which I wanted to protect the battery from getting drawn below 50%).Forget the cheap controllers for less than $20. This is the best PWM controller I've found. The next jump would be to an MPPT controller, but those will cost at least $50 more.Some have commented that the terminals are too small for the wires--they are a little small, but they work with the cables that come with the solar panels. I didn't try to wrap the wire around the screw, but just loosened the screw as far as I could without it coming out and poked the wire along one side of the screw and tightened it back down. Worked fine for all 6 wires.

For the money it was worth the try. It lasted one day, when plugged into the batteries it told us the batteries were too low to charge so I took the battery and charged it. Plugged it all back in and the screen is only showing half the digits on the screen and the screen fades in and out of clarity. I had a brand new battery fully charged and got the same thing. Not worth the time and energy to send it back. Not worth the purchase.

It's really hard to beat at the price point. Sure it's not MPPT, but if your array voltage matches your battery voltage (12v for parallel or 24v+ for series) and you're making a smaller system then you're fine. The trick with this solar charger is to match the panel output voltage (12v, 24v, etc) with the battery bank voltage.The connectors it comes with are suitable for 10ga standard sized solar wiring. However, the clamps from the controller to the battery are also 10ga sized. If you're using the "load" side of this charge controller for anything significant, these won't be enough. I wouldn't drive a 3000w inverter off the load side. It would have been nice to see some posts on this thing for the battery connectors which would make me feel a bit better but this controller is suitable for charging. Don't put anything beefier than a car accessory plug on the load side.Out of the box, the display is fine. The manual is decent. It comes with clamp down terminals enough for all the screw down posts. These are crimp type, so you should pick up a crimp tool to use them, along with some heat shrink to dress up the connections. I didn't have any problems crimping them down.The 12v/24v says that it's "auto" but in my case, but the manual says how to change it. The 12v setting was fine for me. There's also setting for charging on a schedule, etc, but honestly you just want the thing "on" when the panels are "on". The default is perfectly fine for this. Selecting the battery should be done by the user, using LI for Lifepo4 batteries. Another nice feature is being able to set the battery voltage levels for things like charging and floating.The positive pole on this is the ground and has a common pole. This means that the system is a positive ground system. Radio operators be aware.There is no bluetooth connectivity which would be nice to have. Build quality is nice except for the plastic buttons which feel incredibly cheap. However given that the system is really set-it-and-forget-it, this is hardly a deal breaker.