product description

This is a automatic 12VDC-12VDC charger that can charge the main battery through the alternatorand starter battery, DC-DC battery charger designed specifically for motorhomes, campers, ships, etc.

B2B Charge：

It means to charge the main battery through alternator and starter battery. If it is not used in the vehicle, you can also use one battery to charge another battery
1. When the vehicle is running, the vehicle alternator can quickly charge the main battery
through the charger at full power
2. The charger can charge the main battery according to the specified voltage and current by boosting or stepping down to ensure that the main battery is in accordance with the standard.
charging curve charging

Product parameters

Main battery “BOARDⅠ"
Lead-Acid, Gel, AGM Batteries Nominal Voltage:12V
LiFePO4 Nominal Voltage:12.8V
lithium-ion(NCM) Nominal Voltage:11.1V
Capacity (Battery Size), recommended:100-520AH
Battery voltage range:8V-16V
Vehicle Starter Battery “Start II”:
Vehicle Starter Battery Nominal Voltage:12V
Capacity (Battery Size), recommended:80-100AH
B2B Charging operation
Start battery voltage range:10.5V-16V
"D+" signal voltage:8V-16V
Temperature compensation: 3mv/℃/2V
“TR”signal:NC
Main battery temperature sensor”T T:YES
Main battery voltage detection”SS-,SS+":YES
Stand-by current: 32±2 mA
Operating temperature: 20-50℃
Dimension：190x215x70mm
Accessories：Monitor(MT-2) Optional
BT module:(BT10) Optional
Temperature Sensor(TRS) Optional

Q&A

1.What is DC to DC charger
DC to DC Chargers charges your RV house battery with the power coming from your vehicle's alternator, which generates energy to feed the vehicle's electrical system and charges the starter battery (also known as a CCA battery - Cold Cranking Amps) as you drive down the road.

2.Do I really need a DC DC converter?
Why do I need a DC DC converter? In a nutshell, your DC DC converter will charge your auxiliary battery faster, to a far greater level and safely regardless of your vehicle's alternator type. ... If you have or are considering a lithium battery, then you absolutely have to run a DC DC converter

3.Do you need a DC DC regulator for AGM battery?
For lead-acid deep cycle batteries such as AGM or Gel, you need a charger with an Amp output of 10-20% of the battery capacity. For example, a 100Ah AGM Battery should have at least a 20Amp DC DC regulator. For Lithium batteries, the charging output should be at least 30% of the battery capacity.