Best Dual Battery Boxes for RV Upgrades and Safe Storage
Finding a reliable dual battery box for your RV ensures batteries stay protected from shocks, moisture, and corrosion while simplifying installation. This guide reviews five top-rated options that balance durability, ventilation, and ease of use. Each product supports multiple battery configurations and is designed for rugged RV environments. The choices below help you compare materials, ventilation, and mounting features to pick the right box for your setup.
| Product | Battery Capacity Support | Material | Ventilation |
|---|---|---|---|
| Camco Double Battery Box (55375) | Two 6V GC2 or two 12V Group 24/24M | Cerrosion-resilient polymer | Ventless design with protective interior |
| Camco 55374 Double End-to-End Battery Box | Two 6V GC2 or two 12V Group 24/24M | Corrosion-resistant polypropylene | Vented design |
| Camco Side-by-Side Double Battery Box (55385) | Two Group 24 | Polypropylene (built for RV use) | Vent design to expel gases |
| NOCO Snap-Top Battery Box | Group 24-31 (12V) | Durable composite | Snap-top with secure mounting |
| Camco Large Battery Box (55373) | Groups 27, 30, 31 | Corrosion-resistant polypropylene | Includes lid and latching features |
Overview: The products highlighted prioritize weather resistance, safe battery housing, and easy installation for RV systems. They range from heavy-duty polymer to stainless steel variants and include features like venting, locking lids, and secure mounting hardware. If you’re upgrading an RV’s electrical system or relocating batteries for better weight distribution, these options offer robust protection and straightforward integration with your existing setup.
Camco Double Battery Box (55375) — Heavy-Duty Poly Construction
The Camco Double Battery Box provides safe storage for two batteries with a rugged, corrosion-resilient polymer body. It supports two 6V GC2 batteries or two 12V Group 24/24M units and measures internally to fit within standard RV compartments. Durable construction helps protect batteries from impacts, while the enclosure design reduces exposure to environmental hazards on the road or at the campsite.
Key details include: (1) capacity for two batteries, (2) inner dimensions of 21 ½ inches by 7 3/8 inches by 11 3/16 inches, and (3) a robust polymer shell designed to resist corrosion in outdoor conditions. This box is suitable for travel trailers, motorhomes, and other RV configurations where space and protection are priorities.
Ideal uses: RV battery relocation projects, two-battery systems for auxiliary power, and any setup needing a dependable, water-resistant housing that will endure road vibrations and weather exposure. The box’s design emphasizes safety and durability during long trips and outdoor stays.
Peastorm Trailer RV Marine Battery Box (Double Battery Box) — Steel Dual Battery Relocation Kit
This steel dual battery box by Peastorm delivers robust protection for two batteries in harsh environments. The heavy-duty steel construction provides substantial protection against impacts, moisture, and debris, making it well-suited for boats, trailers, and RVs. Features include handles on both sides, a lockable upper cover option, rubber-ring protected reserved holes, and bottom screw-in mounting holes for secure installation.
Key points: (1) steel construction adds rigidity and longevity, (2) waterproof and fire-resistant properties, (3) patent-like design optimized for double-battery installation in varied vehicles. It is compatible with car, marine, RV, and camping setups where a rugged relocation solution is needed.
Consider this option when you need maximum durability and a box designed to withstand exposure to saltwater or off-road environments. It’s a strong choice for dual-battery arrangements requiring a high level of protection and security.
Camco Side-by-Side Double Battery Box (55385) — Includes Venting and Accessories
This Camco model is designed for side-by-side battery arrangements and features a vented design to expel hazardous gases safely. It holds two Group 24 batteries and is a versatile RV accessory suitable for motorhomes, travel trailers, and toy haulers. The package includes a battery box, hose, hose mount plate, louvered vent grill, foam tape, and mounting hardware for straightforward installation.
Highlights: (1) effective gas venting to maintain a safer storage environment, (2) compatibility with typical RV electrical configurations, (3) inclusion of essential hardware for quick setup. It’s a practical choice for RVers seeking reliable ventilation and a ready-to-install storage solution for dual batteries.
Consider the target: users prioritizing gas management and a complete installation kit in one box. Ventilation, accessibility, and compatibility with common Group 24 batteries are strong selling points for this model.
Camco 55374 Double End-to-End Battery Box — Heavy-Duty Polypropylene
This double end-to-end box accommodates two batteries and is crafted from heavy-duty corrosion-resistant polypropylene. The end-to-end layout supports efficient pairing of two batteries in compact spaces, making it suitable for various RV layouts. A vented design facilitates safe battery operation, helping to prevent moisture buildup and battery gases from accumulating inside the enclosure.
Practical aspects: (1) robust polypropylene construction for outdoor durability, (2) end-to-end configuration for space optimization, (3) ventilation to support battery longevity. This box is appropriate for RV owners who need a flexible, durable dual-battery housing in limited compartments.
Camco Large Battery Box (55373) — Group 27, 30, 31
Designed for larger battery configurations, the Camco 55373 supports Group 27, 30, and 31 batteries. It features a lift-off lid, a durable woven hold-down strap, foot clamps, and stainless steel screws. The box is lightweight yet sturdy, with corrosion-resistant polypropylene suitable for RV environments that demand reliable long-term protection for bigger batteries.
Key attributes: (1) accommodates larger group sizes for extended power needs, (2) includes mounting hardware and securing strap, (3) corrosion-resistant material for outdoor use. This option is ideal for RVers expanding to higher-capacity batteries or solar-integrated systems requiring a robust battery housing.
Buying Guide: Key Considerations When Choosing a Dual Battery Box for RV
- Battery compatibility: Confirm the box supports your battery types and groups (e.g., GC2, Group 24/24M, Group 27/30/31). Some boxes are end-to-end, others side-by-side, which affects fit in your compartment.
- Material and durability: Polypropylene and stainless steel offer corrosion resistance and weatherproofing. Steel boxes excel in rugged environments but require more care against rust in harsh conditions.
- Ventilation vs. sealed design: Venting helps expel gases and moisture, reducing risk for long-term battery health. Ventless options may be cleaner but require careful environment control.
- Locking and security: Some models offer lockable lids or secure straps. If you transport valuable or sensitive batteries, choose a design with added security features.
- Mounting and hardware: Look for pre-drilled holes, included screws, and mounting plates. Ease of installation is important for RV upgrades and relocation tasks.
- Ease of access and maintenance: Consider lid design, reachability, and whether the box permits easy inspection of battery terminals and connections without full removal.
- Ventilation accessories: Some products include hoses, vent grills, or louvered vents—useful for safety and to comply with RV ventilation practices.
- Dimensions and fit: Compare inner dimensions with your battery sizes to ensure a comfortable fit with clearance for terminals and cables.
- Warranty and support: Check manufacturer warranties and included accessories to ensure long-term value and replacement options.
When evaluating choices, balance durability, ease of installation, and compatibility with your RV’s electrical plan. For dual-battery setups where space is at a premium, end-to-end configurations may maximize storage in tight compartments. If you prioritise gas safety and ventilation, vented boxes can help maintain a safer storage environment. For higher-capacity systems or larger batteries, select a box designed for Group 27, 30, or 31 units, ensuring secure mounting and protection against the elements.