10A 20A 30A Solar Charge Controller 12V/24V PWM Solar Charge Controller with LCD Display USB Port Suitable for FLD/LiFePO4/SLD/GEL

Although this charge controller works as described, there are a few problems/potential issues I encountered. The first problem is the screw terminals. In order to connect battery clamps, I had to cut the ring terminals off the clamp leads to get bare ends to insert into the terminals. Another CC that I tried previously had screws that worked with ring terminals (with a little trimming) and provided a more reliable connection. These terminals allow the wire to slide slightly out of the way as you tighten them down, giving a less than ideal contact between terminal and wire. The tinned leads to a solar array contoller on the outputs had slightly less problem, but the wire still shifted slightly to the side, so it took me a couple of tries to get a solid connection that didn’t pull free. It would be nice if this came with leads and common connectors so the buyer doesn’t have to make up their own. Most solar panels, for example, are going to have MC4 connectors or possibly an XT60 connector, which are very common for solar generators.The heatsink shown farther down in the listing is covered by a smooth plate. So far, I’ve only used this in cold weather, so heat build-up has not been an issue. I’m a little concerned that when it gets hot this summer, if it’s running at full capacity it might get a bit hot and the cover plate will limit airflow and heat dissipation.One other issue is the lack of a higher IP rating (it’s rated IP32). You can certainly put any device like this into a weather-proof enclosure, but it would be nice if it were rated at least IP64 for dust and water intrusion. A common place to use these is outside. If I put it into an enclosure, now I’ve restricted the airflow more, making the heatsink less effective.The menu is very simple and easy to use. The instructions are a little dodgy, but I was able to figure them out no problem. There is only one choice for lead acid batteries – no different settings for gel, flooded, or AGM which each take slightly different charge parameters. Since the panel I’m using for this is much higher capacity than needed to charge the battery daily, I’m not very concered about MPPT vs PWM. This should work fine for my application.