Slower operation also increases component life. Larger bearing width than our competitors. The brushes and slip-ring assembly are in a sealed compartment to keep grit, salt, and moisture out. The 9800J features an extra-wide rotor and stator combination for unmatched performance at low engine speeds. Recommended for heavy-duty trucks, buses, emergency vehicles and other applications needing high output at low engine speeds.
Many applications require significant power from the electrical system even at engine idle.
In fact, many competitive alternators never reach turn-on speed during idle and fail to charge the battery. This can result in deep cycling and premature failure of batteries. Weak batteries, in turn, can contribute to starter burn-up.