RENOGY 12V/24V 50A DC to DC Battery Charger with MPPT Battery Charger, IP67

Put this in a VW van along with a 100 amp hour Li Ion battery in the cabin. With the Bluetooth module you know all your stats on battery voltage and charging current. Used it with both alternator and solar. Keep in mind it can do 30 amp on alternator or 30amp solar but not at the same time. If both inputs are charging, neither will go above 15 amp. Like if you have 1 amp solar charging the max charge rate is 15amps alternator + 1 amp solar = 16amps. I unplug the solar when driving so I get full 30 amp charge.

Well made unit that does what it's designed to do: control, optimize, and monitor DC to DC solar panel and alternator charging of your 12 volt house battery system. This all-in-one charging controller is easy to install for a person with a basic understanding of an off grid 12 volt electrical system; the included instruction are very clear and informative. The features via the optional BT-2 bluetooth module (highly recommend) are comprehensive and make monitoring your system status via your phone a must (and a pleasure). The unit also treats your battery right via multi stage charging that will extend the life of your battery.

I purchased the Renogy 30amp dc to dc charger with mppt around one year ago while completing an overlanding build. I previously used a solenoid to charge to second battery and was unable to keep to charge the battery completely regardless of the drive time or battery level. I rely on this battery for a 12volt fridge, lights, and other minor power needs while off grid for several days. I purchased this unit to complete my power needs as I finished my build. It does everything it advertises and it does it well. I have ran this unit for approximately one year with not one problem. I tend to over build my systems so I used larger than recommended wiring and I am very picky about my connections. I depend on this vehicle to take me on 3000 mile trips and get my family and me home safely and this charge controller exceeds my needs.I plan to add other Renogy products to my systems in the future such as the battery monitor and inverter. I will also use this controller and other Renogy products on new build that I am working on now.

This is a really well made dc charger. The setup is very easy, and the app has tons of options. If you’re looking for plug and play that also allows all the customization you could want, this is the item for you.Power output is consistent with expectations.The app allows customization.Overcharge can be reverted back to the car battery, keeping your car battery in great shape.The Renogy app was very user friendly as well. I really had to learn my stuff to customize the settings. If anything, Renogy could update their help screens in the app so all the options are easier to interpret for those of us who aren’t electrical engineers. I love that Bluetooth is built into this device and not another $30+ purchase as well.

updated 2025. New app updates to the Bluetooth module have not solved the problem. You can not connect to this charger using Bluetooth alone the app requires a working internet connection to revalidate your login every so often. Which means this product is unusable for people camping offgrid.Pros:NoneCons:HugeInefficient compared to inexpensive MPPT setupsNo Battery nor charging statusBluetooth module does not work offgirdI got this to replace my MPPT 15Amp charger. The Renogy setup is significantly worse. My old charger could run my fridge indefinitely with the same 110W panel. With the Renogy I am out of power sometime while I sleep.This thing is huge. It’s like 4 times larger than a similar MPPT system.There is no screen or way to see the charging rate and battery status. I bought Renogy’a external display but it does not give enough detail. So I also bought their Bluetooth module. The Bluetooth module plus app give amazing detail but only work with a recent internet connection. The docs say you can login to the app and then use it offline with Bluetooth, but this is a lie. Do NOT expect that to work. The app re validates the login token. I just tried it after a few months of not using the app and it gave me an auth token error and said I needed to login. Dealbreaker!I do NOT recommend.

I have run through a dozen different products from Renogy, and I think this is a my favorite. In use for several months at the time of this updated review.Most people will need the bluetooth module for configuration.Because the charging amps are configurable (In 10A increments) this is the perfect product for a boat with an outboard. I have mine set to charge at 20A, and it does a great job detecting when the outboard is running and charging my LiFE4Po bank. It also works great with solar. The way this device works and is wired saves a lot of room, wiring, and complexity on any boat/RV.One major complaint: The PV Voltage is ridiculously low. I upgraded from a 200w panel with a really low PV voltage, which worked fine, to a 300w panel with a normal 36V PV Voltage and now I have to upgrade. It's not clear if the 50A version actually has a higher rating, there is a lot of conflicting information.Two minor complaints: 1) I wish the charging amps were configurable to an exact number or at least 5 amp increments. For some small outboards on boats even 10 amps is going to be too much. 2) I wish there were a way to keep the device from turning on from incoming solar. I don't think this is a feature on any other solar charge controller, but it is annoying to have to install a breaker or switch just to keep the unit from turning on every time the sun is out.

Installed on travel trailer for long trip. Wired truck up for high amp charging and installed 400w solar. System worked great and charged as expected. Definitely recommend a shunt to monitor things. Saved money by not having to by charge controller and dc to dc separate.