A Group 27 battery typically measures 12.5 x 6.8 x 9 inches (LxWxH) and weighs 50–70 lbs. It’s designed for high-capacity applications like RVs, marine systems, and solar storage. These batteries provide 80–110 Ah capacity, supporting long-term power needs. Their size balances energy density and physical footprint, making them ideal for heavy-duty use.
What Is a Group Size 24 Battery?
What Are the Exact Dimensions of a Group 27 Battery?
A Group 27 battery has standardized dimensions of 12.5 inches in length, 6.8 inches in width, and 8.9–9.5 inches in height. These measurements ensure compatibility with battery trays in vehicles and equipment. Weight ranges from 50 lbs (AGM) to 70 lbs (flooded lead-acid). Terminal placement (top or side) varies by manufacturer but adheres to SAE specifications.
How Does a Group 27 Battery Compare to Group 24 or 31?
Group 27 batteries offer 20–30% more capacity than Group 24 (70–85 Ah vs. 50–70 Ah) but are smaller than Group 31 (100–125 Ah). They balance size and power for mid-range applications like marine starters or RV house batteries. Group 31 suits higher energy demands, while Group 24 is better for compact spaces.
Top 5 best-selling Group 14 batteries under $100
| Product Name | Short Description | Amazon URL |
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|
Weize YTX14 BS ATV Battery  |
Maintenance-free sealed AGM battery, compatible with various motorcycles and powersports vehicles. | View on Amazon |
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UPLUS ATV Battery YTX14AH-BS  |
Sealed AGM battery designed for ATVs, UTVs, and motorcycles, offering reliable performance. | View on Amazon |
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Weize YTX20L-BS High Performance  |
High-performance sealed AGM battery suitable for motorcycles and snowmobiles. | View on Amazon |
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Mighty Max Battery ML-U1-CCAHR  |
Rechargeable SLA AGM battery with 320 CCA, ideal for various powersport applications. | View on Amazon |
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Battanux 12N9-BS Motorcycle Battery  |
Sealed SLA/AGM battery for ATVs and motorcycles, maintenance-free with advanced technology. | View on Amazon |
| Battery Group | Capacity (Ah) | Typical Use Case |
|---|---|---|
| 24 | 50-70 | Compact vehicles |
| 27 | 80-110 | RVs/Marine |
| 31 | 100-125 | Commercial equipment |
What Applications Are Ideal for Group 27 Batteries?
Group 27 batteries power marine engines, RV appliances, solar storage, and commercial equipment. Their 80–110 Ah range supports sustained loads like refrigerators, trolling motors, or off-grid lighting. AGM versions excel in vibration-prone environments, while lithium variants reduce weight by 40% for portable setups.
In marine applications, these batteries handle simultaneous demands for engine starting and powering onboard electronics. For solar installations, their deep-cycle capability allows daily discharge/recharge cycles. Truckers often use them for auxiliary power units (APUs) to run climate controls during rest periods without idling engines.
How Does Temperature Affect Group 27 Battery Performance?
Cold temperatures reduce lead-acid Group 27 battery output by 30–40% at 0°F. Lithium-ion models maintain 95% efficiency down to -4°F. High heat (above 100°F) accelerates sulfation in lead-acid batteries, shortening lifespan. Always store batteries at 50–80°F and use insulation kits in extreme climates.
Temperature impacts charging efficiency significantly. At 32°F, lead-acid batteries require 14.8V for full charging compared to 13.8V at 77°F. Lithium batteries employ internal heating systems to maintain optimal performance in cold conditions. Always monitor voltage thresholds when operating outside recommended temperature ranges.
| Temperature Range | Lead-Acid Capacity | Lithium Capacity |
|---|---|---|
| 32°F to 77°F | 100% | 100% |
| 0°F | 60-70% | 95% |
| 100°F+ | 85% (with degradation) | 98% |
“Group 27 batteries are the workhorses of deep-cycle applications. The shift to lithium has been transformative—we’re seeing 3,000+ cycles versus 500 in lead-acid. But proper sizing remains critical. Always match the battery’s BCI group to your system’s mechanical and electrical specs.” — John Harris, Power Systems Engineer
FAQs
- How long does a Group 27 battery last?
- Flooded lead-acid: 3–5 years. AGM: 4–7 years. Lithium: 8–12 years. Lifespan depends on discharge depth and maintenance.
- Can I use a Group 27 battery for my truck?
- Only if the vehicle’s manual specifies BCI Group 27. Most trucks use Group 24 or 31. Check terminal placement and CCA requirements first.
- Are Group 27 batteries sealed?
- AGM and lithium Group 27 batteries are sealed and spill-proof. Flooded models require venting and regular water top-ups.