Renogy Rover 40 Amp 12V/24V DC Input MPPT Solar Charge Controller Auto Parameter Adjustable LCD Display Solar Panel Regulator fit for Gel Sealed Flooded and Lithium Battery

I upgraded from a Rover 20A Li to an 40A and installed this yesterday to replaced the Rover 20 that had gone bad. I was awed by the low price ($140) and jumped on it. It’s built like a tank. I highly recommend you read thoroughly the instructions before installing any wires! You can ruin it if you do it out of sequence.The screws for tightening down the wires are small so I don’t recommend using the Phillips option. I had better luck using the flat tip screwdriver. I highly recommend the Bluetooth module BT-2 sold separately. You can monitor the status on your smartphone as well as change the settings.

Easy to install, work great. Installed about 6 months ago. Each controller runs (2) 200 watt panels and charges a 280 ah battery. In total my system has (4) 200 watt panels, (2) 40 amp solar controllers and (2) 280Ah lithium iron phosphate batteries. For a total of 560 ah. This is on a boat, it also runs a 3000 watt inverter/charger and a 40 amp dc to dc charger. No issues so far however I don’t really tax the system very much. Plenty of reserve for a night on the hook.

Working great so far and it's been over a year.

I wanted another Tracer 40 Amp - these are already trusted at my remote property, but apparently obsolete. Rover seems to be Tracer's replacement. The algorithm is great - power conservation from PV to BAT tested well. Two main complaints: Although 8 AWG did fit in the BAT+/- terminals, it's very difficult to get wires in the BAT and PV terminals and feel confident they are engaged. It also feels like standard torque for 8 and 10 AWG wire will break the terminals. Second item is that the user's manual left out major portions of what the operator needs to do to access necessary programming screens - it took an extra day of messing with the Rover to essentially add notes to the manual to complete what was missing. On the plus side, Rover does not use a dorky extra, expensive terminal to program that will be dead/destroyed when it's needed later. It can use USB software to set it up - my experience is that a kid with zits will have changed USB so much in ten years that no laptop then will even have a port to support it. Note to Renogy: I buy Renogy because past experience shows the somewhat premium price pays off well in reliability. I hope that Renogy insists on top quality in the future. Note to customers: I installed marine cable to large DIN rail terminals underneath the Rover, so those Rover terminals only need to be torqued well one time. Hint on programming screens you can't find - try UP and DOWN keys, not RT/ENTER. Battery parameter adjustments are only available in USER BATTERY TYPE.

Perfect for the system

Initially, I bought a Rover 30 for my solar panels back in 2022. It failed after 6 months. Renogy would not honor the warranty because they said the charge controller for my wind generator voided it, even though there was nothing in the warranty language that prohibited it.After 1.5 years with an unbranded hybrid MPPT that could take wind, I decided to take the wind offline, add two more panels. The Rover 40 seemed to make sense in that application. I hoped that this time the Renogy, which does well in converting high voltage low amp current from the panels to 24V/high amp charging current, would serve its purpose well.For the first couple weeks, it did very well. But now about once a day, I have to take off, reposition, and re-connect the battery cables. It work fine for a while, and then stop charging. Then I am running straight off the batteries until they run down. Seems the battery cables will not stay connected despite my best efforts.I've noticed in different reviews, others have also had issues with their terminals. One person complained that the screw stripped out, which suggests to me they were trying the get a good, lasting connection. I don't think this problem is unique to me.Since I am still within 30 days and since I had poor experience with their customer service previously, I'm not taking any chances. I've orderd a Vectron to replace this, and as soon as it arrives this thing is going back into the box and back to Amazon.No more Renogy products for me. I'm done with them.