2017 Volvo VNL Battery Size and Group Guide

Quick Answer

For your 2017 Volvo VNL, here are the key battery specifications:

• BCI Group Size: Group 31 (typically four batteries in a series/parallel setup)
• CCA Rating (per battery): 900-1100 CCA is recommended for each Group 31 battery.
• Reserve Capacity (per battery): 170-200 minutes is common for Group 31 batteries.
• AGM vs. Flooded: Most VNLs come from the factory with flooded lead-acid batteries. AGM batteries can be used but ensure the charging system is compatible or no specific limitations are imposed by Volvo for AGM use in heavy-duty applications. Flooded batteries are generally more cost-effective for these larger setups.
• Terminal Layout: Typically SAE post terminals, top-mounted.
• Physical Dimensions (per Group 31 battery): Approximately 13" L x 6.8" W x 9.4" H.
• Dual-Battery Setup: The 2017 Volvo VNL uses a quad-battery setup (four Group 31 batteries) arranged in a series-parallel configuration to provide 12V power with increased cranking amps and reserve capacity.

Replacement Battery Options

When it's time to replace the batteries in your 2017 Volvo VNL, here are some popular choices. Remember to purchase four identical batteries for optimal performance.

• Interstate: MT31 (Flooded) or MTZ-31 (AGM) - Part numbers vary by specific model and features, consult Interstate catalog.
• Optima: Optima Commercial RedTop Group 31 (Not a common pick for quad-battery HD setups due to cost and differing specs, but a robust option if specific needs arise).
• DieHard Commercial: Group 31 (Flooded or AGM options available) - Part numbers vary.
• Odyssey: 31-PC2150S (AGM) - A premium, high-performance AGM option.
• ACDelco: 31-7T (Flooded) or 31AGM (AGM) - Part numbers vary.

AGM vs. Flooded — Which Does This Vehicle Need?

The 2017 Volvo VNL primarily comes equipped with flooded lead-acid batteries from the factory. These traditional batteries are a reliable and cost-effective choice for heavy-duty applications like the VNL, especially when using a four-battery bank.

Flooded batteries are generally more tolerant of high heat and are often less expensive, which can be a significant factor when buying four batteries. They do require occasional maintenance (checking and topping off electrolyte levels), though many modern flooded batteries are "maintenance-free" in the sense that they are sealed, but still contain liquid electrolyte.

AGM (Absorbed Glass Mat) batteries offer several advantages: they are completely sealed and maintenance-free, highly resistant to vibration, and can tolerate deeper discharges without damage. They also have a lower self-discharge rate, making them ideal for vehicles that sit for extended periods. However, AGM batteries are typically more expensive. If you opt for AGMs, it's generally recommended to replace all four batteries with AGM units to ensure consistent performance and charging characteristics across the battery bank. Always verify that your charging system is compatible with AGM batteries, although most modern heavy-duty charging systems can handle both types.

For most VNL owners, staying with high-quality flooded Group 31 batteries is the most practical and economical choice, aligning with the vehicle's original design.

Post-Installation Relearn / Reset Procedure

After disconnecting and reconnecting the batteries in your 2017 Volvo VNL, you may need to perform a few simple steps to ensure all systems are functioning correctly. Unlike some passenger vehicles, heavy-duty trucks typically have fewer complex "relearn" procedures for basic battery disconnection.

1. Engine Start: Start the engine and let it idle for 5-10 minutes. This allows the Engine Control Unit (ECU) and other modules to re-establish communication and perform basic system checks.
2. Window and Radio Presets: You may need to reset your radio presets and potentially recalibrate power windows if they have an auto up/down feature (refer to your owner's manual for specific window calibration steps, which usually involve holding the switch in the up/down position for several seconds after the window reaches its limit).
3. Drive Cycle: A short drive cycle under various conditions (city, highway) can help the transmission control module and other adaptive systems recalibrate.
4. Check for Diagnostic Trouble Codes (DTCs): Although unlikely for a simple battery disconnect, if any warning lights appear on the dash, it's advisable to check for DTCs using a diagnostic tool. Most common issues resolve themselves after a brief run time.

Signs of a Failing Battery

Given the quad-battery setup in the VNL, issues might manifest differently than in a single-battery car. Look out for these signs:

• Slow Cranking: The most common sign. The engine turns over slowly, or struggles to crank, especially in cold weather.
• Dim Lights: Headlights, interior lights, or dashboard lights appear dim when the engine is off or cranking.
• Warning Lights: Battery warning light or other electrical system warnings on the dashboard.
• Electrical Accessory Malfunctions: Power windows, radio, or other electrical components behaving erratically or not working at all.
• Corrosion: Excessive corrosion around the battery terminals can indicate a failing battery or poor connections.
• Swollen Battery Case: Bulging or cracking of the battery case is a clear sign of internal damage and requires immediate replacement.
• Frequent Jumps: Needing to jump-start the truck regularly is a strong indicator of battery degradation.

Common Battery Issues for This Generation

For the 2017 Volvo VNL, common battery issues often revolve around the demands of heavy-duty use and the multi-battery setup:

• Parasitic Draws: Heavy-duty trucks often have numerous accessories (fridges, inverters, auxiliary heating/AC, communication systems) that can create parasitic draws, slowly draining the batteries when the truck is off. This can lead to premature battery failure if batteries are frequently discharged deeply.
• Vibration Damage: Constant vibration from road conditions can degrade the internal components of batteries, especially flooded types. Using high-quality, robust heavy-duty batteries is crucial.
• Charging System Issues: Problems with the alternator or voltage regulator can lead to undercharging or overcharging, both of which are detrimental to battery life. Ensure your charging system is functioning correctly.
• Imbalance in Battery Bank: In a multi-battery setup, if one battery starts to fail, it can put undue stress on the others, accelerating their degradation. It's generally recommended to replace all batteries simultaneously in a bank for optimal performance and longevity.
• Poor Connections: Loose or corroded battery terminals and cables can restrict current flow, leading to charging problems and starting issues.
• Environmental Factors: Extreme hot or cold temperatures can significantly impact battery life and performance. High heat accelerates internal corrosion, while extreme cold reduces cranking power.

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