Review on Renogy Rover 40 Amp MPPT Solar Charge Controller - 12V/24V DC Input, 🌞 LCD Display, Auto Parameter Adjustable, Compatible with Gel Sealed, Flooded, and Lithium Battery Systems by Alex Ferry

My 9 year old Xantrex C35, 35 amp charge controller failed just as I was starting a long vacation on my 50 foot solar houseboat (read my article in the Houseboat Magazine, The Joys Of Free Power), so I replaced it. But then I realized maybe I should have bought an MPPT controller, so I gave Rover a try. On a sunny day my 500Ah battery hits bulk (14.4v) around 10am and by 11pm I finished the absorption phase and the C35 got me to 13.5v. This Renogy device never gave me full Voltage bulk and I boiled my batteries all day at 14.4v, just below bulk's default setting for flooded 14.8v. I then used the menu option to set it to 'sealed batteries' but then it burned my batteries at 14.2v all day and never got high enough to convince the controller I was in the resorption phase. Speaking of the menus, the menu options never allowed me to navigate to other options and I tried the supplied USB to RS232 cable and downloaded their software but was unable to log into the unit using my PC. The Renogy software required a password that I could never figure out and I never got a response from Renogy customer service even though I opened a ticket with them. Either the firmware is not fully implemented or it's just a very bad design. Never use these guys again.