VEVOR 12V 20A DC to DC Battery Charger, 250W, On-Board Battery Charger for Lead-Acid, Lithium, AGM, Gel, and Flooded Batteries, Smart Multi-Stage Charging, for RVs, Commercial Vehicles, Boats, Yachts

Why did you pick this product vs others?:First time use. Bought this to test my new lithium battery charging system. Didn’t want to spend a whole lot of money while testing.The goodDischarge my battery to 50%. Installed with good wire and with my fluke at pro God 30.4 A charge bulk.. then at about 13.5 V charge dropped to 15 A. I have it set on lithium charge at a max voltage of 14.4 V.The badThe hook up terminals are on the small side. Fix was to buy a cheap pair of jumper cables from Walmart and I cut the copper connections to fit the small screws on the input/output terminals.I I now have the promise charge current output. It does work as promised, but I have low time usage. Hopefully it will last for a long time. The fans are somewhat noisy, but no more noisier than a box fan, I would say probably 55 DB’s maybe 60. My gaming laptop is noisier.Value for money:since I was using this as a test bed, I did not want to get excessive in price. My whole set up including a 45 amp converter with chargers set up cost about $350 less than 400 for converter separate charger and lithium battery. The converter and charger are from the same company. surprise as how well it actually turned out!My settings converter set at 13.2 V 45 A. DC to DC charger set on a lithium with a max of 30 A.150 amp cheap jumper cable interconnects both. At 30 amp bulk charge output was 30.4 A with an input of 40 amp. Float charge was 15.5 A with an input of 20.5 A. longevity has yet to be tested.

I received a unit that worked for approximately 2 minutes. I tested all my connections with a multimeter and found them all to be good and within operating tolerances. I even checked the internal fuses and found them intact. The unit itself was just a bad one.I was going to buy the same one in case I received a one-in-a-million mistake, but due to this having only 18 reviews and not all of them positive, I just went with another brand, though it was more expensive.

Easy install, seems to do the job well. Made for a much easier trip when facing long travel days that otherwise would be draining the camper house battery bank.

I bought this to charge a 100ah lithium battery in my off-road camping trailer (it runs my 12v fridge, lights, etc). Just drove 1000 miles with the dc to dc charger and it worked flawlessly. I use a Bluetooth voltage monitor so I could see it working. Only knock on it as others have said is the terminal connections are a bit small for proper gauge wire. That said, given the price, I’m very happy with the purchase. I made it work.

As other reviews have mentioned, the Vevor SDC-30A model seems incapable of even coming close to its 30 amp specification.To test it, I started charging a 12 volt, 100 AH Lithium LiFePO4 battery that had been discharged to 20% capacity. The charging current would be expected to be at its maximum during this initial bulk charge phase. I set the Vevor’s DIP switches for 14.6 volts output as recommended for the battery. It’s input voltage was 13.7 volts from a car alternator. However, the Vevor charger’s output never got above 13.1 volts and 13 amps charging current! For comparison, a 55 amp AC-powered charger was able to supply 56.5 amps to the same battery after disconnecting the Vevor.The low output current of the Vevor charger means it would take more than twice as long to charge a battery as would be expected of a 30 amp charger.

After a week long trip it did what it was supposed to do and that was to keep the deep cycle battery in the pickup camper charged. No worries about using the 12 volt fridge on the road, the charger kept the battery topped off.

Terminals are small but luckily the 30 amp model only charges with 11.9-12.2 amps so I guess it doesn’t need the larger terminals. I double checked the half amperage switch is not active and when I do activate it, it charges at 6 amps. Kinda a waste and I’m bummed.

The media could not be loaded. Prods - built strong, works good alsoCons - terminals for power cables too small - impossible to use standard cable terminals. Need to grind every terminal from both sides to fit then in narrow spaces. Moreover power connections should be rotated on 90 degrees because it’s difficult to connect to power terminals. Would return products and newer buy VEVOR dc to dc because it’s has terrible power terminals. I love VEVOR products, but this charger must be modified. Attached photos of example good terminals other dc charger.