A Group 24 battery typically operates at 12 volts, aligning with standard automotive and marine electrical systems. This voltage supports engines, electronics, and auxiliary devices in vehicles like RVs, boats, and trucks. Group 24 refers to battery size (10.3″ x 6.8″ x 8.9″) and terminal placement, not voltage, but most in this category are 12V deep-cycle or dual-purpose batteries.
What Is a Group Size 24 Battery?
How Does Voltage Define a Group 24 Battery’s Performance?
Voltage determines a battery’s energy delivery capacity. A 12V Group 24 battery provides sufficient power for starting engines and running appliances. Higher reserve capacity (RC) and amp-hour (Ah) ratings (e.g., 70-85Ah) indicate longer runtime. Performance depends on plate thickness (for deep-cycle use) and electrolyte stability, critical for sustained voltage under load.
In applications like marine trolling motors or RV refrigerators, voltage stability directly impacts operational efficiency. A battery delivering consistent 12V output ensures devices like inverters and GPS systems function without voltage drops. Thicker lead plates in deep-cycle Group 24 batteries allow deeper discharges (up to 50%) while maintaining structural integrity. For example, a 85Ah AGM battery can power a 10A load for 8 hours before reaching 50% discharge, whereas thinner-plate batteries might sag below 11V prematurely. Temperature compensation also plays a role – lithium variants maintain voltage better in cold but cost 3x more than lead-acid.
Top 5 best-selling Group 14 batteries under $100
| Product Name | Short Description | Amazon URL |
|---|---|---|
|
Weize YTX14 BS ATV Battery  |
Maintenance-free sealed AGM battery, compatible with various motorcycles and powersports vehicles. | View on Amazon |
|
UPLUS ATV Battery YTX14AH-BS  |
Sealed AGM battery designed for ATVs, UTVs, and motorcycles, offering reliable performance. | View on Amazon |
|
Weize YTX20L-BS High Performance  |
High-performance sealed AGM battery suitable for motorcycles and snowmobiles. | View on Amazon |
|
Mighty Max Battery ML-U1-CCAHR  |
Rechargeable SLA AGM battery with 320 CCA, ideal for various powersport applications. | View on Amazon |
|
Battanux 12N9-BS Motorcycle Battery  |
Sealed SLA/AGM battery for ATVs and motorcycles, maintenance-free with advanced technology. | View on Amazon |
| Amp-Hour Rating | Runtime at 10A Load | Recommended Use |
|---|---|---|
| 70Ah | 7 hours | Small RV lighting |
| 85Ah | 8.5 hours | Marine electronics |
Where Are Group 24 Batteries Most Commonly Used?
Group 24 batteries power marine vessels (trolling motors, fishfinders), RVs (lighting, inverters), and solar setups. Their compact size suits confined spaces, while 12V compatibility integrates seamlessly with alternators and charge controllers. Dual-purpose variants balance cranking amps (CA) for engine starts and deep-cycle endurance for accessories.
These batteries excel in pontoon boats where space under seats is limited but power demands are high. A dual-purpose Group 24 with 800MCA can start a 150HP outboard while simultaneously running a 12V livewell pump. In solar applications, two Group 24 AGM batteries wired in series create a 24V system for small off-grid cabins, supporting LED lighting and water pumps. Their 50-60 lb weight makes them easier to install in tight RV battery trays compared to larger Group 31 units. Emergency backup systems also utilize them due to their balance of capacity and footprint – a single unit can power a CPAP machine for 10+ hours during outages.
| Application | Typical Consumption | Group 24 Advantage |
|---|---|---|
| Marine Trolling | 30A continuous | Vibration resistance |
| RV House Battery | 15A intermittent | Compact sizing |
Why Choose a Group 24 Battery Over Other Sizes?
Group 24 offers a balance of capacity (70-85Ah) and footprint, fitting spaces too small for Group 27/31. It’s lighter (40-50 lbs) than larger sizes, easing installation. Compared to Group 34, it provides higher Ah for prolonged accessory use, ideal for weekend RV trips or moderate marine needs.
FAQs
- Is a Group 24 Battery Suitable for Cold Weather?
- AGM Group 24 batteries perform better in cold due to sealed designs and lower freezing points (-40°F vs. -20°F for flooded). Ensure full charges to prevent electrolyte freezing.
- Can I Replace a Group 34 with a Group 24 Battery?
- Only if the Ah/CCA requirements match. Group 24 has lower capacity than Group 34 (70-85Ah vs. 90-105Ah), so verify your system’s needs.
- How to Test a Group 24 Battery’s Health?
- Use a multimeter: 12.6V+ indicates full charge. Load testers apply a 50% CCA load; voltage should stay above 9.6V after 15 seconds. Hydrometers measure specific gravity (1.265+ for flooded).