Waterproof 10A 12V Bluetooth MPPT Solar Charge Controller Regulator with Battery Alligator Clips and Standard Solar Connectors for Lithium-ion LiFePO4 AGM Gel Lead-Acid Vehicle Batteries

This MPPT controller comes with all the wires and connectors needed for for the most common hookup, and a Bluetooth app for your phone. You don't have to go out and buy battery cables, or splice on new mc4 connectors for your solar panel.It is a true mppt controller, which converts excess volts to amps, so it outputs more amps to your battery than the amps coming in from the solar panel. The 10 amp controller is truly waterproof. There are no exposed wire terminals that get wet (but the 20 amp one looks different)The amps generated by the controller was 15% more than the amps coming from the panel by my measurements. It was 13% more according to the Bluetooth app. I was a little disappointed with these numbers because I had hoped for 20%, which is typical of other mppt controllers.Update: The controller is putting out around 20% more amps to the battery than it receives from the solar panel. So pretty good, and comparable to other mppt controllers.The app is a bit funky. It initially comes up with the main display screen, with all the touch points disabled. You have to swipe the whole screen right or left to get to the setup screen.The app setup requires you grant permission for the app to see your location in high accuracy. That's weird.The app shows you amps the controller is putting into the battery, amps coming out of the solar panel, and amps going into the load wires, if you use that feature. A fairly nice feature set.The controller uses 15 mA of power when the solar panel is not connected, which was the same as my old PWM controller that has no Bluetooth. Pretty good.The controller is tiny, 3.25" x 3.5" x 0.8". You can put it almost anywhere. The flange you bolt through to hold it in place is 3/16ths" wide. It will be hard to find a bolt small enough and strong enough to fit on that.The fuse on the battery cable is about 3" from the battery terminal. That means you have to leave it in the battery box, or splice on more wire to let it hang outside the battery box. Outside is preferable. Too bad they didn't add another 6 inches of wire.The crimp to the fuse feels like repetitive bending will break it. It probably should be replaced.The documentation is not very good. They do not document which mc4 connector is positive or negative. They say the positive wire is red, but both panel wires are black. The mc4 connector with the barbs on it was negative on my controller.

Works great! Wish they made a 30 amp one

First of all, I bought this for experimentation and for use is a small solar power station using a lithium ion batter. There are zero controls for this controller except through the bluetooth app which is nearly junk. There are 3 LEDs that give you some indication as to what is going on with the unit but no real detail. The app is difficult to set up and is useful but vague information.The unit is very small -- smaller than the Amazon listing indicates. The battery wiring harness is OK and one of the reasons that I bought the unit. However, there an no screw terminals on the unit for anything. The PV input is via decent solar panel connectors but no other way to connect a panel without some surgery. I suspected that the PV panel inputs were mis-wired (reversed polarity) and there was no easy way to check that. It turns out that the problem was elsewhere and the revers polarity protection saved the unit from max-smoke. I decided to keep the unit as a back-up controller but will not use it in my power station (getting a Renogy 20A MPPT instead). The lack of controls except via the crappy app and the panel input connectors were the 2 main issues that convinced me that life is too short to tolerate this controller. But, did I mention that the battery wiring harness is good?

Easy and waterproof. 100% going to buy a 20 amp next.

I can monitor my battery life, load, and solar output to battery