EPEVER MPPT Solar Charge Controller 30A 12V/24V Auto Work Common Negative Grounding with LCD Display Solar Panel Charge Controller Regulator for Gel Flooded Sealed Lithium type (Tracer3210AN)

Helped improve my current setup

I ordered this controller because it has a "user" setting for the battery, because my gel batteries need a different voltage from the standard gel setting. I checked the manual on the manufacturer's website, which showed that you can set the various voltages, etc on the controller. Once I received it, this turned out to no longer be the case, they have made some changes. So, I needed to order a separate cable to do this.With this cable you can connect to either Windows PC (bit of a hassle, but worked in the end) or Android phone (very hit and miss, not reliable).It turned out that the voltage the controller is set to is inaccurate by 0.1-0.15V, (it regulates too high), which is a significant error when it comes to battery charging. You can try and get around it by tweaking the voltage in the app, but since it is not consistent (as mentioned from 0.1 to 0.15V off) I returned the controller.Other observations:- the display is only readable when you look at it at a right angle, from slightly above or below it is difficult to make out- Android app is for old versions of Android- the manual for the controller is OK with some poor or strange English (e.g. "this product is artistic"), the one for the Windows app is very poor.I ordered a Victron instead.