Best Large Battery Box for RVs: Top Picks for 12V and 6V
Finding a reliable, spacious battery box is essential for RV setups that run on multiple battery configurations. The selections below focus on large, durable boxes that safely store RV, marine, and automotive batteries while offering convenient access, secure mounting, and rugged construction. Each option is evaluated for compatibility with common RV battery sizes, ease of installation, and long-term durability in harsh conditions.
| Product | Battery Types | Material | Highlights |
|---|---|---|---|
| Camco Double Battery Box | 2× 6V GC2 or 2× 12V 24/24M | Corrosion-resilient polymer | Heavy-duty, internal dimensions 21.5″ x 7.38″ x 11.19″ |
| Camco Large Battery Box (55373) | Group 27/30/31 compatible | Corrosion-resistant polypropylene | Includes lift-off lid, straps, and hardware |
| NOCO Snap-Top BG31 | Group 24-31 batteries | Durable plastic | Simplified installation with strip-mount system |
| NOCO Snap-Top BG27 | Group 27 batteries | Rigid, rugged plastic | Pre-drilled pilot holes for direct mounting |
| Attwood 9067-1 Vented Battery Box | Group 27 batteries | Polypropylene, vented | Integrated venting to release gases safely |
The following sections present five highly relevant options for large RV battery storage, each with key features drawn from product listings and typical RV installation scenarios. The focus is on safety, ease of use, and compatibility with common big batteries used in RVs and marine equipment.
Camco Double Battery Box
The Camco Double Battery Box is designed to hold two large batteries, making it ideal for RV setups that require extra storage capacity. Its heavy-duty, corrosion-resilient polymer construction helps resist the daily wear of camping trips and outdoor conditions. Internal dimensions measure 21 1/2 inches long, 7 3/8 inches wide, and 11 3/16 inches high, which accommodates common 12-volt Group 24/24M and 6-volt Group GC2 batteries. The box provides a secure, organized housing for two batteries, reducing shake and movement during travel. This model emphasizes safety and durability, ensuring batteries stay protected from the elements while remaining accessible for maintenance and monitoring.
NOCO Snap-Top BG31 Battery Box
The NOCO Snap-Top BG31 is built for Group 24 to 31 batteries and features a rigid, snap-top design that enhances installation efficiency. This model supports a broad range of 12-volt batteries used in marine, automotive, RV, boat, camper, and travel trailer applications. Its pre-drilled internal pilot holes offer straightforward direct mounting, while the strap mount system provides flexibility for rugged installations. If you frequently switch batteries or require easier replacement, the BG31’s design aims to simplify routine tasks while maintaining solid protection against the elements and chemical exposure inside the box.
NOCO Snap-Top BG27 Battery Box
The NOCO Snap-Top BG27 is tailored for Group 27 batteries, including 12-volt automotive, marine, RV, and deep-cycle configurations. It shares the SnapTop line’s emphasis on rigidity and ease of installation, with pre-drilled pilot holes for direct mounting and the option for a strap mount system in demanding environments. For RV enthusiasts running larger batteries in limited space, the BG27 provides a compact yet robust housing that protects against leaks, spills, and debris while allowing quick access for checks and maintenance.
Attwood 9067-1 Vented Battery Box
The Attwood 9067-1 is a vented battery box designed to securely hold Group 27 batteries while mitigating gas buildup through integrated ventilation. Its inside dimensions are 13-1/16 inches by 6-15/16 inches by 10-1/2 inches, with outside dimensions of 16-7/8 by 9-5/8 by 10-7/8 inches. Constructed from acid-resistant, impact-tested polypropylene, it performs reliably across a wide temperature range (-20°F to +120°F) and is suitable for harsh environments encountered in RV and marine applications. The vented design helps protect battery longevity by reducing hydrogen gas accumulation inside the box.
Camco Large Battery Box With Straps (55373)
The Camco Large Battery Box with Straps is designed to safely store Group 27, 30, and 31 batteries for RVs, boats, and automotive setups. It includes a lift-off lid, durable woven hold-down strap, foot clamps, and stainless steel screws, delivering a complete mounting solution. The box is lightweight yet sturdy, crafted from corrosion-resistant polypropylene to withstand outdoor exposure. It is a versatile choice for RV owners who require a roomy enclosure with secure hardware to keep batteries in place during transit and while parked at camping sites.
Buying Guide: Key Purchase Considerations
- Battery compatibility: Verify the box supports the battery group sizes you use (e.g., Group 24, 27, 30, 31). Some models are dual-battery capable, which is useful for RVs with multiple turns of power.
- Material and durability: Look for corrosion-resistant plastics or polypropylene that resist UV exposure, moisture, and chemical byproducts from batteries. Heavier boxes typically provide better protection against movement and impacts.
- Ventilation and safety: For lead-acid batteries, venting is critical to minimize gas buildup. If the box is vented, ensure it is properly integrated and that standard mounting locations have adequate clearance.
- Installation options: Pre-drilled holes, strap mounts, and included hardware simplify installation. Some boxes offer direct-mount capabilities without straps, which can save time during RV modifications.
- Seal and weatherproofing: Consider models with snug lids, gaskets, or seals to reduce water intrusion and dust ingress, especially for boxes located outside the RV or in exposed compartments.
- Security features: Lift-off lids, lockable covers, and robust latches help deter tampering and theft, which is important for outdoor RV campsites.
- Dimensions and fit: Ensure the interior dimensions accommodate the battery dimensions you own, with some extra space for venting and wiring. Exterior dimensions help when planning mounting space under a dinette, in a cargo bay, or on a trailer hitch area.
- Maintenance and accessibility: Choose a design that allows easy access for battery inspection, terminal connections, and removal for replacement without removing other equipment.
When selecting a large RV battery box, balance capacity with safety and installation ease. For RV setups that rely on two or more large batteries, a dual-battery box paired with proper mounting hardware offers a neat, secure solution. For occasional users who migrate between watercraft and motorhomes, a smaller, well-vented box that emphasizes portability and straightforward mounting may be preferable. The products listed above provide a spectrum of options to match different RV configurations, climate conditions, and maintenance routines.