REDARCDual Input 40A in-Vehicle DC to DC Battery Charger with MPPT Solar Regulator, Green Power Priority, 12V/24V Compatible, for Lithium, AGM, Gel, Lead Acid, Calcium, LiFePO4 Batteries

It's rare when a product exceeds expectations, but this blew me away. It's built like a tank. Overdesigned, with huge cables. The engineers that designed this put a lot of passion into the design, and it shows. Over-voltage shut off, under-voltage shut off. Massive cables, and delivers the amps.I'm an electrical engineer, and a 'wire guy', and this charger is amazing.I wired this (orange-green wires connected) for LiFePO4 battery.On the input side my truck supplied approximately 12.5V and up to 30A drawn from the system battery. On the output, a clean 14.4V and full rated 25A.Once I shut off my truck, the truck battery draw stops, and I'm running on the secondary batteries I charged. Exactly as I wanted.This is made in Australia, and I can say I'm super impressed. I'm old enough to remember when "made in America" meant something - products that were built rugged and lasted forever. This charger has the same feel. Cables larger than they need to be. Big heat sink. No doubt this will last and last. I anticipate many happy years with this charger.After years of buying marginal products from overseas that barely deliver, it's refreshing to find one that inspires as much confidence as this. A work of engineering art. Very much looking forward to using it.

Awesome product, charges my second battery (Optima) nicely. Took a 4 day trip off grid with no problems. Never ran short of power. Only drove my vehicle 1-2 hours a day. Quickly charged up my system that powers the refrigerator. Couldn’t be happier.

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

It is an exceptional product, well built and feature rich, but the thing that was incredible was the customer service. I talked to Mark Bruce in Internationl Support and he was incredible. He walked me through everything I would need to set it up and sent me a wiring diagram for my specific application. We are on opposite sides of the world, so for several nights I would email him questions and each morning I had detailed answers. I have since installed it and it is running great. RedArc is the big dog in this market for a reason.

Debe ser instalado por alguien preparado en temas eléctricos. Siguiendo el manual no hay pierde. Excelente producto

honestly works perfectly. i only rated it 4/5 because the price i feel is a bit steep for its function. although i dont know the cost of putting one of these together. i think if it was maybe $100-$200 cheaper, it would be a perfect spot. make sure you read the instructions if youre installing it yourself. otherwise just have a pro install it.

I have had this installed on my 4Runner since 2019. I use it for alternator and solar charging via a panel permanently installed on my roof rack. I have never had an issue with it overheating or any other problem. My two auxiliary batteries, used for Snomaster fridge/freezer and CPAP machine, remain in great shape due to this unit. I highly recommend this appliance.

I've installed 20 DC-to-DC converters. This is it. At $475, or whatever, easily $150 more than similar, it is quality. And you can mount it almost anywhere saving valuable protected space. Simple to install, virtually not setup and works as advertised. Smaller than the 50A Kisae and no fan. This is the 40A version but I'm reasonably sure the 50A is equally good.