EPEVERMPPT Solar Charge Controller 40A 12/24/36/48V Auto Max PV 150V XTRA4415N-G3 Solar Panel Regulator for Gel Sealed Flooded Lithium User

I needed a quality solar charge controller I could trust out in the middle of a forest where it functions for months without being there. With the FOB WIFI added, I am able to remotely monitor the solar system.Well worth the money.

good quality

I compared it to the internal solar charge controller of a Jackery 1000+ and it delivered under quite sunny conditions 45W of a 100W solar panel, while the Jackery could make it to 48W.I consider this a very good result. The minimum voltage for the PV charging is 2 V above the battery charging voltag since this is not a buck-boost-charger. For e.g. a 15V DC module will not deliver enough volts to charge a 12V Lifepo4-Battery. This is not really a minus, since it is clearly stated as such in the manual, but is somehwat inconveniant since a lot of available smaller < 100W-Modules will deliver a lower voltage...

Very good controller.Till now used simpler ones, this one gave me at least 20% more Ampers.Simple configuration, bought the wifi adapter, and can see view and configure though the phone app.

This XTRA 3210AN was my second Epever charge controller, which I paired with my first LiFePo battery. I had worried about the firmware update process, since I use Macs, and the software was for Windows. No sweat. I borrowed a Windows and the seller patiently guided me through every step of firmware update process. They answered each question I posed within, at most, a few hours. After I'd updated the XTRA3210, they even helped me update my previous Epever, a Tracer 4210, so that I'll be ready to replace the AGM battery it controls with a LiFePo when the time comes.

While the unit seems solid and well reviewed, It is very misleading to claim that this supports lithium and user-defined batteries. To be clear, the EPEVER MPPT Solar Charge Controller DOES NOT Support lithium batteries or user-defined battery parameters. This is VERY MISLEADING and I only hope I can save others from completely wasting their times . I have owned many charge controllers over the years and all have been adjustable directly on the unit so this is very unusual.

This does a good job of converting solar panel power to battery power. The manual is confusing though. It has 2 controllers in it. The Lithium setting is GEL . This is because GEL does not use equalize.

i HAVE THE 40A version. I have 4 LiFePO4 100A batteries, thus, a 48V array, currently reading 53V on the controller. I have a 48V solar array producing an average of 300W and a VOC of 80V. When I connected the solar array, the unit did not recognize it. however, the voltage when measured at the screw terminals of the solar input dropped from 80V to -.4V, as if something was shorting out the solar array. I checked all the connections. I hope I did something stupid, because that can easily be fixed. If the unit is bad (unlikely) that's the worst case since it's out of my control. If you have any insight, do respond please. Meanwhile I do have a support ticket but I have little faith that that will result in a fix.