ATEM POWER 40A DC to DC Battery Charger with Anderson Plug Reverse Charge Solar Input MPPT for AGM, Gel, Calcium, Lead Acid, LiFePO4 Batteries of 4WDs, RVs, Campers, Trailers On-Board Charger

This is a second time purchase. Good device for charging dc to dc.

Muito bom mesmo

The charger is good. But it does not deliver 40A as claimed! I have used it for a month now, and the best i got was 25A max. Sometimes it cannot deliver more than 10A even, depending on the temperature. It is installed in a ventilated location. It's charging a 100 AH Lifepo4 battery, and I run a fridge in my Jeep. I struggle to keep the battery charged.

Installed on my Subaru Outback XT last year, at back in the trunk mounted on an ADF molle panel. Runs 6 AWG Marine Grade Copper wires between the starter battery and the charger, thru the firewall, under the side door cover, with dedicated '-' wire (don't use chassis ground which would likely cause voltage drop), using 60A fuse and ACC wire. During the bulk absorption phase, even the engine at idle, usually gets 39.2A charging current. When braking/accelerating, may see brief higher amp between 40-55A. Gemini says this setup is a masterclass installation and excellent real world case for a 40A-rated charger. My 100Ah LFP battery powers Starlink, DC fridge/freezer, laptop, pressure cooker, coffee brewer...at 500+W charging rate, my solar panel is useless.

So far it’s working fine !

Ok