Renogy 50 Amp MPPT Charge Controller 12V MPPT Solar Charge Controller, Capable for Solar Panel and Alternator Power Input, with DC to DC Battery Charger Function, for Gel, AGM, and Lithium Batteries

This controller works very well! I especially like the optional bluetooth for charging status !

Recharges batteries while driving fast and handles my 120watts of solar NP. Way cheaper than buying them separately unless you have more than 400watts of solar. I’ve used it for 2 years now and have had no problems. Being able to monitor on phone is super handy. I would highly recommend this DC charger if you plan on using solar as well but it’s still a good deal for a 50amp dc-dc smart charger. Love it!

This is my second one. It’s easy to set up and does what it’s suppose to do. Easy peasy

Purchased May 10th and it was no longer charging via solar by the middle of August. I've confirmed there is power from the panels (2 100w run in parallel). It still charges when the vehicle is running just nothing from the solar. There is a fuse between the solar panels and charge controller and that is still good so it's something internal on the charge controller.

This unit basically shuts itself on and off every 5 minutes to check to see if there is enough solar to charge. That's not very efficient when alternator charging. Adding a relay that closes the solar input when driving eliminated the issue.