High Efficiency Alternators = Fuel Economy

Fuel Efficiency

Increasing alternator efficiency can, and will, measurably reduce fuel costs.
High efficiency alternators translate to less engine horsepower requirements, resulting in substantial fuel savings to the customer.  Remy recognized the opportunity for this fuel savings and made significant improvements in alternator efficiency with the Delco Remy heavy-duty alternator product offering.  The Delco Remy 28SI™, 36SI™, and 40SI™ alternators operate with industry-high efficiency ratings from 68% up to 70%.  Typical alternator efficiencies are in the 54%-60% range. 

Fuel Savings Calculation

To prove this, real-time operating electrical system data was collected on a line haul tractor, city tractor, and school bus.  The table below represents fuel cost savings over a typical life cycle when alternator efficiency is increased to the range of the Delco Remy alternators over standard industry models.  Notice the significant fuel savings for each application.  Read the white paper Improving Alternator Efficiency Measurably Reduces Fuel to learn more about this study and alternator efficiency.

 * Based on $4 per gallon