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

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!

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.

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.

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.

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.