REDARC Dual Input 40A in-Vehicle DC Battery Charger

Not as full featured as some of its competitors, but this is reliable and does exactly what it claims to do.

This unit is built like a tank! Easy to install, just make sure you follow the instructions to the letter. I initially hooked up the grounds to both of my batteries and this does not work. Must be vehicle or frame grounded. Also do not cheap out on resettable 60 amp breakers. They overheat and trip. I then bought the recommended 60 amp blade fuse breakers from Redarc and the whole setup works amazingly! Full 50 amp charge going to my RV battery bank. Service was also off the charts as I had questions about my initial set up. Absolutely worth the money over the other DC to DC chargers available.

Working great! Easy enough to install. Keeps my Lithium battery topped up. And the proven toughness of Redarc is great piece of mind. Wasn't sure if I needed the 1240 but the 1225 has been perfect and the compact size has been a big help in saving space.

Great product

Not cheap, but it does what it says on the tin. Cons: - Price (but buy once, cry once) Pros: - Tough as nails and waterproof - you can literally mount this thing anywhere - Solid charging performance - 350w/25A to the battery being charged - Great MPPT performance - wrings every last watt out of your solar panels - Set & forget - once it's setup, it just works. - Size - pretty compact Once I installed this, I realized pretty quickly that although the LEDs on the front of the unit will confirm which battery chemistry you have configured it for (lithium in my case), where it's drawing power from (alternator or solar) and charge stage, it can't tell you the state of charge, and Lithium will just output 13.3v until they fall off a cliff when they're pretty much empty. If knowing your state of charge is important, then maybe the manager 30 might be a better unit (will also tell you how much solar is coming in, how much from the alternator etc... I personally couldn't justify the cost and the size of the manager 30, and didn't need all the features that it offers (AC input, control the inverter etc) so went for a Victron BMV712 battery monitor, which gives me most of the important (to me) info and functionality that the manager 30 will give me, and takes up next to no space. Overall very happy with this unit and would recommend it to anyone needing to charge house batteries in any vehicle.