The Van Bitz Battery Master is an automatic 12V charging system for motorhomes and boats that prevents engine battery failure by trickling up to 1.1A of excess power from the leisure battery. It operates automatically, works with solar or mains hook-up, and is designed to keep the engine battery charged during storage. 
 
Key Features and Benefits
Installation: Simple 3-wire connection (positive-to-positive and earth).
Compatibility: Ideal for, but not limited to, lead-acid batteries in 12V systems.
Automatic Operation: Constantly monitors and balances the engine and leisure batteries.
Prevents Flat Batteries: Specifically designed to keep the starter battery charged, avoiding damage from deep discharge.
Safety Features:
 Regulates charge to 1.1A, includes built-in thermal fuses, and is waterproof/vibration-resistant.