* Increased Starting Power: Two batteries in parallel provide double the cold cranking amps (CCA). This is crucial for reliably starting a large engine, especially in cold weather or when numerous accessories (like power windows, lights, and heated seats) are drawing power.
* Supporting High-Demand Accessories: Modern vans often have substantial electrical demands. Features like power inverters, large entertainment systems, and auxiliary power outlets place a high load on the electrical system. A single battery might struggle to handle these demands, leading to slow cranking or even a dead battery. Two batteries mitigate this risk.
* Redundancy: If one battery fails, the other can still provide some power, potentially allowing you to get the vehicle to a repair shop. This backup improves reliability and prevents complete electrical failure.
In short, the use of two batteries in some E-250 vans is a measure to ensure reliable starting and adequate power for the vehicle's electrical systems, especially those with high power demands. Not all E-250 vans use two batteries; it depends on the year, trim level, and optional equipment.
