What is the size of a group 24 battery?

A Group 24 battery typically measures 10.25-10.5 inches long, 6.75-6.875 inches wide, and 8.75-9.25 inches tall. It provides 70-85 Ah capacity and 600-800 CCA, making it ideal for marine, RV, and automotive use. Its standardized BCI size ensures compatibility with vehicles requiring moderate power in compact spaces.

What Is a Group Size 24 Battery?

How Do Group 24 Battery Dimensions Compare to Other Battery Sizes?

Group 24 batteries are smaller than Group 27 (12.06″ L) and Group 31 (13″ L) but larger than Group 35 (9.06″ L). Their balanced size suits mid-sized applications like marine trolling motors and RVs, whereas larger groups prioritize higher capacity for heavy-duty needs. Exact dimensions vary slightly by manufacturer but adhere to BCI standards.

Battery Group	Length (inches)	Width (inches)	Height (inches)
Group 24	10.5	6.875	9.25
Group 27	12.06	6.75	9.12
Group 31	13	6.8	9.4

What Are the Common Uses for a Group 24 Battery?

Group 24 batteries power marine vessels (e.g., trolling motors), RVs (house and starting batteries), and automotive applications (SUVs, trucks). They also support solar storage, backup power systems, and commercial equipment due to their blend of compact size and reliable output. Deep-cycle variants excel in sustained energy delivery for auxiliary systems.

In marine environments, Group 24 batteries are frequently used for dual-engine boats where space is limited. Their corrosion-resistant terminals make them suitable for saltwater applications. For RV owners, these batteries efficiently power lighting, refrigeration, and entertainment systems while maintaining a manageable footprint. In solar installations, AGM Group 24 batteries are preferred for their maintenance-free operation and ability to handle partial state-of-charge cycling. Commercial uses include powering forklifts, golf carts, and medical equipment where reliability and moderate energy demands intersect.

How to Maintain a Group 24 Battery for Longevity?

Keep terminals clean with baking soda and water. Regularly check electrolyte levels in flooded batteries (distilled water only). Avoid discharging below 50% (lead-acid) or 20% (lithium). Store in a cool, dry place during off-seasons and use a maintainer for lead-acid types. Test voltage monthly.

For flooded lead-acid batteries, monthly equalization charges help prevent sulfation. AGM batteries require less maintenance but benefit from occasional terminal inspections to ensure tight connections. Lithium-ion variants should be stored at 50% charge if unused for extended periods. All battery types perform best when kept clean—wipe away dirt and debris to prevent parasitic drains. Temperature extremes degrade performance, so insulate batteries in freezing conditions and avoid direct sunlight in hot climates. A digital voltmeter or hydrometer can help identify early signs of capacity loss.

How Much Does a Group 24 Battery Weigh?

Weight ranges from 40-50 lbs, depending on type. Flooded lead-acid batteries weigh closer to 50 lbs, while AGM and lithium-ion variants are lighter (40-45 lbs). Weight impacts portability and installation, especially in marine/RV contexts where load distribution matters.

What Is the Capacity and CCA of a Group 24 Battery?

Capacity spans 70-85 Ah (ampere-hours), with CCA (cold cranking amps) between 600-800. Deep-cycle versions prioritize reserve capacity (120-180 minutes) over CCA, while dual-purpose models balance starting and cycling. Lithium variants offer higher effective capacity (100+ Ah) due to deeper discharge cycles.

How to Install a Group 24 Battery Safely?

Ensure terminals are clean and corrosion-free. Securely fasten the battery with hold-down clamps to prevent vibration damage. Connect positive (+) terminal first, then negative (-). Use insulated tools and wear protective gear. For marine/RV use, install in ventilated, dry areas away from fuel sources.

How to Determine if a Group 24 Battery Fits Your Vehicle?

Measure your battery tray: it must accommodate 10.5″ L x 6.875″ W x 9.25″ H. Check terminal positions (top/post) and orientation (left/right positive). Consult your vehicle manual or use BCI group charts. Aftermarket trays can modify space, but ensure weight distribution aligns with manufacturer specs.

Why Were BCI Group Numbers Standardized?

The Battery Council International (BCI) established group numbers in the 1940s to unify sizing across manufacturers. This eliminated compatibility chaos, ensuring consumers could replace batteries without measuring. Group 24 emerged as a mid-sized option for evolving automotive and marine markets needing compact power.

“Group 24 batteries strike a rare balance between size and performance,” says a marine energy systems engineer. “Their adoption in hybrid marine/RV applications has surged, especially with lithium variants offering 2,000+ cycles. However, users must prioritize proper ventilation—heat remains the top killer of lead-acid batteries.”

FAQs

Can a Group 24 Battery Be Used as a Deep-Cycle Battery?

Yes, specific Group 24 batteries are designed for deep-cycle use, offering 120-180 minutes of reserve capacity. Look for labels like “marine deep-cycle” or “dual-purpose.”

Is a Group 24 Battery Interchangeable with Group 35?

No. Group 35 is shorter (9.06″ vs. 10.5″), so it may not fit Group 24 trays without modifications. Check terminal placement and tray size first.

How Long Does a Group 24 Battery Last?

Lifespan varies: flooded lead-acid lasts 3-5 years, AGM 4-6 years, and lithium 8-12 years. Proper maintenance and avoiding deep discharges extend longevity.