50A DC DC Board Battery Charger with MPPT

I have a cargo trailer that I use for work with a 2000 watt inverter to run power tool chargers & lights in the trailer. I have a 200 watt solar array connected to the solar input as well as the vehicle smart alternator input. The (2) 100 Ah AGM batteries stay charged through this device to where I never have to plug in my trailer to the house to charge my batteries. What I like about this product is if it’s cloudy and I’m using power then the vehicle will charge the batteries as I’m driving from job to job or I can start the truck for a few minutes and get a charge. This device also prevents voltage feeding back to the vehicle from my trailer batteries as it would if it were connected straight to the battery output from the truck. It also prevents overcharging of the batteries, extending the life. Lastly, the ability to change battery types on this device makes it great to use for different battery chemical types. The price is a little high but it does exactly what I need in just one device.

Not sure why this product is so unusual in the market. Having both vehicle power input AND a solar power input is very helpful to say the least! Came with some nice accessories like terminals and a nice ALN fuse holder. Hooked up easy, does what it says it does. I highly recommend getting the BT2 accessory. I could see that one of the solar panels I bought was defective. I would have not been able to detect that without it. ALSO, I can use the phone app to set a MAX charge current. That is very helpful for when I want to charge my power crate off of a car cigarette lighter socket etc. My project is intended to run a remote office while camping in remote areas. The charger fills a 100Ahr Lithium battery. Inverter is just a little 400w unit. I used a 50A Anderson connector for the vehicle power input and a 30A Power pole for the solar hook up. If I added more solar I would upgrade that. I have a power disconnect switch on the battery to isolate the system when not in use. Enjoy.

Warning: These controller profiles are made specifically for Renogy batteries. How do I know? I ran on their "Li" profile for my Litime batteries. After a year, my controller started having issues and caused all kinds of chaos with my batteries. Renogy Tech Support told me that their controllers are tuned for their batteries, and anything outside of that must use the "User" profile (Custom). And because of this, Renogy refuses to honor the warranty on my controller. Be warned!

I got this for my van build. The sun doesn't always shine but the wheels keep a-turning! I would highly recommend this thing if you're built right for it. MAKE SURE YOUR ALTERNATOR CAN HANDLE THE EXTRA LOAD!!!! Aftermarket high output alternators highly recommended. This unit reliably pulls 48 to 50 amp and up to 700 w when it's really cranking. BE SURE YOU HAVE THE RIGHT FUSES AND OVERSIZED WIRE! If you disregard my warnings you stand the real risk of killing your alt and possibly burning yourself to the ground. It's a lot of juice. Handle it with respect. Do your math and your homework. Also keep in mind that a ton of heat is being generated at the charger. Make sure you have plenty of ventilation to dispell the excess heat and I would advise putting a couple cheap thermostat controlled laptop fans on it. They're like 6 dollars. This will help preserve the charger and prevent excessive heat build up in your cabinet. I actually put a large laptop fan in the air intake opening I put on my cabinet and another to exhaust the heat from the box. Otherwise It's very easy to hook up and required nothing special to hook up and fire up. Worth every cent. Just don't wing it , ok? It's not cheap and messing with this stuff without the right information and prep could cost you dearly.

I upgraded my solar panel with the shade tech panel. Then found out I needed to upgrade to this 50amp dc/dc charger from my 30 amp This works well and keeps the batteries top off. If I read the instructions correctly it even charges my automotive start battery if it gets run down.

I upgraded my 2003 Sportsmobile with a 300AHr lithium battery and needed a dc/dc converter, this one did the job. I'm very happy with Renogy products, everything works awesome now!

This is 3.75" high, not 3.05". The manual linked to the page is for an older version. This new version checks for solar amperage every 5 minutes and cycles from 50 amps to 0 and then back to 50. Hard to believe that is good for the alternator. Tech support worked hard but had limited understanding of the product. The simplicity, price and charger is GREAT. We switch the solar off when driving and then back on when parked. Use a relay to do this automatically with the ignition.

I like this controller however it’s limited to a max solar power of 25 VOC which was a little misleading in the listing on Amazon. It does handle the alternator from the truck of my 2022 Thor Omni motorhome, which makes it a better product. Just wish it could handle more solar power.

Super easy to install and charges really well. Renogy make incredibly well build products and I would highly recommend. It allows us to run the fridge when travelling in our trailer on battery power without running down the battery. You do need to ensure you run the correct wire gauge for the length of your run from your vehicle battery to the charger. I would also recommend to get the appropriate circuit breakers for safety.

I've had this wired up in my vehicle for a few months and it's doing a great job. I've regularly seen it pushing over 40A through the battery. 45 minutes driving a day is enough to keep my fridge running 24/7. Knowing how fast I can charge the battery I wish I'd bought a smaller one!

Looks good quality but haven't installed it yet.

Installed in a bus conversion to take advantage of the alternator charging my LiFePo4 batteries when the engine is running and being able to trickle charge the starter batteries while parked. Seamless installation, robust connectors and after I ordered and installed the BT-2 hardware, the app provides all the pertinent information in real time. Time will determine the durability of the device, but it's working great thus far. Cheers!

J'ai installé cette équipement et tout de suite constaté à l'usage que les spécifications indiqué dans la présentation respectaient à 100% la réalité. Charge jusqu'à 50 ampère. La programmation est facile. Même le mode personnalisé permet de limiter l'ampérage de charge et tout les autres paramètres. Bon produit que je recommande fortement. Est supérieur à d'autres marques populaires. Je suis bien content de mon achat