48V to 48V DC to DC Charger 

(available now)

offers safe charging between seperate banks of 48V batteries. 

BB484830 - 48V to 48V DC DC charger ~1600W. 30A. ideal for charging between 2 sets of 48V batteries. Lithium or lead acid. 

Combining a 48V battery bank directly onto an independent 48V battery bank can be perilous due to differential voltages between banks. 

A worst case scenario may be a 15S 48.0V lithium battery that is flat ~40V, being connected to a full 16S 51.2V lithium battery sat at 54V. This would result in vast current flows leading to BMS open circuit, meaning no charging would take place. A similar event may occur when simply connecting a full 51.2V battery onto an empty one. 

The BB484830 offers current limiting and correct charging voltages for charging between an array of voltages 39V-60VDC.

An example may be that you have a large 48V rack style storage battery that you use to charge up smaller capacity 48V batteries that are utilised in vehicles / electric boats / robots.

The BB484830 can be activated by any voltage signal between 8-80V on the ignition feed. There is also a selectable vibration sensor mode that shall engage the unit when the BB is in motion.