Most gas-powered UTVs rely on a 12-volt battery, typically in the 28–40 amp-hour range, with common group sizes such as 24/24F or 35. Electric UTVs use much larger high‑voltage battery packs rather than a standard 12V automotive battery.
This article explains the typical sizes you’ll encounter for gas UTVs, how to identify the correct replacement for your model, and the options you can choose between (lead-acid, AGM, lithium). It also covers what to know for electric UTV packs and how to verify specifications with your manual or dealer.
Gas-powered UTVs: 12-volt batteries
Common sizes you may encounter
Before listing common replacement formats, note that exact sizes vary by model and year. The following group sizes cover the majority of mid- to full-size gas UTVs.
- Group 24 or 24F — a widely used 12-volt option for many mid-size UTVs; typically available in flooded, AGM, or Gel variants.
- Group 35 — a common choice for larger or heavier UTVs; often available in AGM or flooded types and designed for higher capacity needs.
- Other model-specific groups — some UTVs use less common sizes (or OEM-only configurations); always verify with your owner’s manual or dealer.
In summary, most gas UTVs use a 12-volt battery in the 24–35 group-size range, with nominal capacities around 24–40 Ah depending on the model. Always match the exact group size and terminal orientation to your machine.
Battery types and replacement considerations
Choosing between lead-acid, AGM, and lithium
While traditional lead-acid (flooded) batteries are inexpensive and easy to replace, many UTV owners opt for AGM (absorbed glass mat) batteries for their spill-resistance and better vibration tolerance. Lithium options can reduce weight and improve cranking, but require compatible charging and a suitable BMS (battery management system).
Before you buy, consider these factors to ensure compatibility with your UTV’s electrical system:
- Fit in the existing tray and have compatible terminal positions
- Required cold-cranking amps (CCA) and reserve capacity (RC) for reliable starts
- Maintenance preferences (flooded vs AGM vs lithium)
- Charging system compatibility and available aftermarket chargers
Bottom line: for many users, an AGM replacement of the OEM size provides a good balance of reliability and maintenance ease; lithium can offer weight savings but may require different charging practices and warranty considerations.
Electric UTVs: high-voltage battery packs
Electric UTVs do not use a standard 12-volt battery for propulsion. They rely on high‑voltage battery packs that supply the traction motor. Pack sizes vary widely by model and range targets, typically measured in kilowatt-hours (kWh) rather than amp-hours. In practice, you’ll encounter packs in roughly the 20–60 kWh range or more for higher-end models.
When evaluating an electric UTV’s battery, focus on these aspects rather than trying to map it to a 12V car battery size:
- Nominal pack capacity (kWh) and expected range under typical conditions
- Voltage of the pack and the associated charging requirements
- Manufacturer’s battery warranty and availability of service or replacements
- Charger compatibility, charging times, and any fast-charging options
Note that electric UTVs require specialized handling and servicing for battery packs, so consult the manufacturer or an authorized technician for replacements or upgrades.
How to determine your UTV battery size
To identify the correct size for replacement, start with the owner’s manual or dealership parts diagram. If you don’t have access to the manual, you can:
- Remove and inspect the existing battery for the group size printed on the label
- Measure the battery tray dimensions and compare with standard group-size dimensions
- Check the terminal layout and polarity to ensure compatibility with replacements
- Ask the manufacturer or parts specialist for the OEM specification for your model/year
After confirming the size, consider whether you want to stay with a flooded lead-acid, upgrade to AGM, or switch to a lithium option, keeping in mind charging requirements and warranty coverage.
Summary
For most gas UTVs, expect a 12-volt battery in the 24–35 group sizes, commonly 24/24F or 35, with 28–40 Ah capacity. Electric UTVs use much larger high-voltage packs, not a conventional 12V battery. Always verify the exact size, capacity, and terminal configuration in the owner’s manual or with the manufacturer, and choose a battery type that fits your usage, maintenance preferences, and charging setup.