BATTERIES
0 results
48 Items
Sort by:
Best selling
No product found in this collection
Extensive industry knowledge available when you need it.
Contact us today for expert assistance sourcing your part.
Batteries For Peterbilt Trucks
Peterbilt trucks typically run dual- or quad-battery configurations to handle the high cranking demands of large diesel engines and support accessories like APUs, inverters, and refrigeration units. Whether you're replacing a failed battery or upgrading your entire bank, we carry commercial-grade batteries with the cold cranking amps and reserve capacity needed for reliable starts and all-day power. Shop batteries compatible with Peterbilt 389, 579, 567, and other models.
Frequently asked questions about batteries
What battery group size do Peterbilt trucks typically use?
Most heavy-duty Peterbilts use Group 31 batteries, the standard size for commercial truck battery boxes. Some configurations also use Group 4D or 8D batteries for applications requiring higher reserve capacity, such as trucks with auxiliary power units or heavy accessory loads. Check your specific model's service documentation to confirm the correct group size and quantity for your configuration.
How many cold cranking amps does a Peterbilt diesel engine need?
As a general rule, heavy-duty diesel engines require a minimum of 950–1,000 CCA per battery in the cranking circuit. Trucks operating in very cold climates — below -20°F — may benefit from batteries rated at 1,100 CCA or higher. With a standard four-battery parallel/series configuration on a Class 8 truck, total available cranking current is well above minimums, but individual battery health matters: a weak battery in the bank can drag down the entire starting system.
How do I extend the life of the batteries on my Peterbilt?
Keep terminals clean and corrosion-free, and check hold-downs regularly so batteries aren't vibrating loose. Avoid deep discharging by running accessories with the engine off for extended periods. If the truck sits for long stretches, a battery maintainer prevents discharge. Also test alternator output regularly — an undercharging or overcharging alternator is one of the most common causes of premature battery failure in commercial trucks.