Sterling Power BB1248120 Battery to Battery Charger - 12V - 48V / 60AThe BB1248120 is able to charge in both directions. Provided there is over 52.8V on the leisure battery (54.0V if lithium) and the starter battery is below 26V the BB shall allow approximately 20A to flow back to the starter battery up to about 26.8V (float voltage). It simply allows the starter battery to remain topped up when there is surplus energy in the domestic battery. This feature will NOT drain your domestic battery - it simply takes surplus. Once your alternator / engine turns on or you provide the BB with an ignition signal the BB reverts to normal charging of the leisure battery. This mode can be disabled, but is on as default. This is ideal for allowing the starter battery to remain topped up when you have solar / wind / charger - charging up your leisure battery. Features: - Buck Boost design, offering high efficiency (93-95%)
- Simple installation and setup
- Current limiting 4 stage battery charger
- Lithium safe
- ~20A reverse charge current to 13.3V
- Jumps Start Assistance Mode
- 24V to 48V
- BB1248120 - 1500W of output charging power
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