2016 Peterbilt 579 Battery Size & Group

Quick Answer

• BCI Group Size: Group 31 (typically three or four batteries)
• CCA Rating: 900-1000 CCA per battery (minimum for reliable starting)
• Reserve Capacity: 180-200 minutes per battery
• AGM vs. Flooded: Either is acceptable, but AGM often offers better vibration resistance and longer life in heavy-duty applications.
• Terminal Layout: Typically SAE posts, with a common top-post configuration.
• Physical Dimensions (Group 31): Approximately 13" L x 6.8125" W x 9.4375" H
• Dual-Battery Setup: The 2016 Peterbilt 579 uses a multi-battery setup, usually three or four Group 31 batteries, wired in parallel for 12V operation and increased CCA.

Replacement Battery Options

Finding direct part numbers for heavy-duty truck batteries can sometimes vary by retailer and specific product lines. However, here are popular options by brand for Group 31 batteries that are suitable for your 2016 Peterbilt 579:

• Interstate: Workaholic Series (e.g., MT31, DPM-31DT) – Look for their heavy-duty Group 31 offerings.
• DieHard: Platinum Commercial Group 31 – Their heavy-duty line is designed for commercial vehicles.
• Odyssey: Odyssey 31-PC2150 (AGM) – A premium AGM option known for performance and durability.
• ACDelco: Professional Group 31 (e.g., 31SHS) – ACDelco offers reliable heavy-duty batteries.

Always confirm specific part numbers and specifications with your supplier based on your vehicle's exact requirements.

AGM vs. Flooded — Which Does This Vehicle Need?

The 2016 Peterbilt 579 can utilize either AGM (Absorbent Glass Mat) or traditional flooded lead-acid batteries. Both have their advantages:

• Flooded Batteries: These are typically more economical upfront. They are reliable and have been the standard for decades. However, they can be more susceptible to vibration damage, require occasional maintenance (checking water levels in some designs), and may not perform as well in extreme temperatures compared to AGMs.
• AGM Batteries: AGMs are a premium choice. They are sealed, maintenance-free, and highly resistant to vibration, which is a significant plus for heavy-duty trucks enduring constant road shock. They also offer excellent deep-cycling capabilities, faster recharging, and superior performance in cold weather. While more expensive initially, their longer lifespan and robust performance often justify the cost in commercial applications like the Peterbilt 579, especially if the truck is equipped with significant hotel loads or auxiliary power demands.

Given the demanding nature of a commercial truck, AGM batteries are often a superior choice for durability and longevity, reducing downtime and maintenance.

Post-Installation Relearn / Reset Procedure

For a 2016 Peterbilt 579, a complex "relearn" procedure after battery replacement is generally not required in the same way it might be for some modern passenger vehicles with sophisticated battery management systems (BMS). However, a few basic steps and considerations are good practice:

1. Ignition Cycle: After connecting the new batteries, turn the ignition to the "ON" position (without starting the engine) for about 30-60 seconds. Then turn it "OFF." Repeat this cycle a couple of times. This allows the vehicle