RENOGY 12V/24V 50A DC-DC Charger with MPPT - IP67 Waterproof Solar & Alternator Charger 720W Boost Buck Voltage Battery Chargers for RV, Marine, Lithium/AGM/Gel Batteries

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.

I wouldn’t want to travel without it. We use this unit, 30a dc-dc w/ mppt, to keep our batteries topped off while traveling. We have an inverter, which allows us to run our fridge in AC mode while driving down the highway. This unit gives us 30a from the alternator, the fridge using 25a and 5 amp charging the batteries. When we arrive at our destination the food is cold and the batteries are usually topped off. We also hook up a Renogy portable 200w panel and a 100w panel. These are connected in parallel, as this unit can’t handle more than 25v in PV mode. I run two 6awg wires to the PV input with Anderson connectors on each one for my portable panels. I usually get around 220-270w of power from this unit, which competes with my 510w of roof mounted panels until mid day. Also note, if you use this unit with panels and alternator, you will receive a max of 15a from the panels and 15a from the alternator. That’s just the way the unit works. If mine even fails, I will replace it immediately with the same unit. I’ve been using this setup for two years now and took a trip to Alaska and back, traveling almost every day. I’m very pleased!

This Renogy DC-DC Charger has been installed now for 10 months and has been very dependable. I did install it with the recommended AWG wiring for the length, using the recommended 40A fuse and I have had zero problems. The value is definitely there with this charger. The available App is actually pretty good but seems Renogy could add in some additional configuration options. The only reason I'm giving 4-stars for the mention of additional options in the App along with the manual could be slightly better as well. The manual is good and easy to understand but there are items I'd like to understand better and having to research it online is a bit frustrating.

This charger works great. Will charge my starter battery once battery bank is fully charged. Also switches to alternator charging the battery bank while driving. Easy to install directions are straight forward.

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.

So I have had this about 2 years and there has been no issues with this and my batteries or truck. This will provide 30 amps to lithium batteries, and pulls about 40 amps from the truck to get that power. I do use the solar side with some moveable panels when I need it, and it has helped keep the truck topped off when connected. I liked it so much when I sold my last rv I removed it and installed it in my new one.

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.