Renogy DC to DC Charger 12V 60A Lifepo4 Battery Charger - On-Board Marine/RV/Boat & Car Battery Chargers for AGM, Gel, Flooded, Lithium - Multi-Stage Smart Charging

Easy to set up and charges my lithium house battery reliably while driving. Great for off-grid setups and super handy when solar isn’t available.

This charger is for my pickup bed/camper and charges a lithium battery. The power supply is isolated from the starter battery. This charger is set up to isolate itself from the starter battery. I didn’t read carefully about the two wires that appeared to be optional. They’re described in the manual and one is required.When the charger wouldn’t charge and I read instructions more carefully, I discovered the unit required connection with one of those little wires to a power source only on when the ignition was on. I made a wire, plugged it in the appropriate slot (requires a very small blade screwdriver) and connected it to the already isolated positive power wire input to the charger. Started the engine and the battery said it was charging at 20 amps. Perfect! The second little wire allows you to charge at 10 amps.I’m adding rocker switches to these wires so I can turn them on or off easily. There is a warning about using this charger around flammable fumes so I want to easily turn it off when hauling fuel.

Update: 8/2020 I used this charger a few times testing it out on short trips around town and it seemed to work great.,however, the morning of my first ever camping trip it stopped working. Leaving my cropped the entire time. Nothing changed. All wiring is good. When I turn it on it does nothing. I used it to charge my bank about 6 times. Never even close to depleted maybe 15% most. I will never buy another Renogy product again. They are garbage. Second device to fail me from Renogy.I have realized that every product I purchased from reboot has on characteristic. They are made the cheapest way possible, with profit at the forefront of manufacturing. You might think all companies do this but no. Reliability and return business are also factors. This chargers connectors function but we’re a pain in the but to work with. I guess they were a step up from the cheap set screws lugs I had on the controller I returned but still cheaply made. As a graduate who has been taught to a read critically I felt their manuals main priority was legal protection for the company and the focus with three or four pages of warnings and cautions and barely a sentence explaining important installation information. Lazy writing that confused more than helped. I returned my Renogy river charge controller for an Epever and am so glad. If I could have afforded a better DCtoDC charger I would have avoided thus one too. As I will rarely need this charger I decided to buy the Renogy but with no faith that I will depend on it. Still keep getting mixed information about whether thus device will drain my battery a couple customers have said yes unless I installed an isolator but this makes no sense. Renogy basically said yes if I turn it on without starting the engine. I installed this using the ignition lead going to my stereo amp but then bypassed it with a dash switch before feeding the device so when ignition is on AND my toggle it would work... well see. I plan on waiting until I am at freeway speeds on the road before ever flipping it on. I’ll update after some use. I didn’t go with the isolator. Seemed too much. I’d might else well pull out jumper cables as use an isolator.

Installed in my van to charge my Temgot 460ah battery off the alternator/battery. Easy to install, easy to set for your battery type. Lights stay on so a small draw but not significant. I got the 40amp version and it's great for my use. Went on an advanture with it on washboard roads for 3 hours- still performs like a champ.

I've used this almost a year now and pretty happy. I use the custom settings to charge a 400 AH lithium battery bank.Pros:- Easy to install- Seems to work reliably- Runs cool- Connections are Anderson PP75 “Powerpoles” which I liked and are way better than typical screw terminalsCons:- The software, as typical for Renogy, makes little sense. The Bluetooth app screens are somewhat nonsensical and frustrating - but - it does work for the basics, at least on my iPhone- Big giant external rotating selection switch makes me afraid I will nudge it by accident. I may pour epoxy on it.- Missing some important settings- Missing a way to disable reverse charging for some circumstances (so I just thrown the breaker I installed)- Big and HeavyOverall I have to give it 5 stars. It works, and Renogy for now has the ONLY bidirectional DC-DC charger which is the big attraction for me.