EPEVER MPPT Solar Charge Controller 40A 12V 24V Auto Common Negative Grounding Max PV 100V Solar Panel Charger Regulator for Gel Flooded Sealed LiFePO4 Lithium (Tracer4210AN-G3)

This is my second one as I am upgrading. Cant fault it.

I like the way the display scrolls through the input, battery and load data. I am using the load program to switch on my garden lights at dusk and switch them off a few hours later

Build quality feels good and general operation is very smooth. Cycling through the menu is a bit laborious with just one menu button, but can make use of the comm port.

Helped improve my current setup

The same as some others reported, worked fine for nineteen month's and then packed up ! Thinking about getting another one only because would fit into space on board vacated by old one. Got no help from supplier (lowenergysupermarket). Bit expensive if you have to buy another one every year or two ! Pat.

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.

Very good product

Worth the premium over cheaper controllers. MPPT algorithm works well to squeeze max power out of limited sunlight. Flexible configuration.

Great charge controller! Been in use for over a month so I cannot comment on durability but it was super easy to install. Programming was fairly simple once I read and re-read the manual. The manual is not overly technical but the translation to English isn't great. The display is a bit difficult to read unless you are looking at it straight-on, off at any angle and the digits fade. The display constantly cycles through multiple screens displaying panel status, battery status, ambient temp, total power generated, etc. Haven't fired up my generator in more than 4 weeks!

Hay que tener cuidado de cumplir con la configuración de conexión de los paneles solares (dependiendo del número de células y si deben estar conectados en paralelo y en serie y la suma de corriente y el voltaje correspondientes), se debe revisar bien el manual donde indica las configuraciones de conexión, de otro modo no funciona.

Funciona perfectamente. Perfecto

I was quite surprised at the size of this monster, and it failed only 6 months after installing it.