Best Battery Box for Travel Trailer: Safe, Durable Battery Storage on the Road
Whether you’re outfitting a travel trailer for extended trips or a weekend getaway, choose a battery box that keeps your batteries safe, secure, and easy to access. This guide highlights five reliable options that balance protection, ventilation, and straightforward installation. Each pick fits common RV, marine, and automotive battery sizes and helps minimize leaks, corrosion, and moisture intrusion. The best choice depends on battery size, venting needs, and whether you want built-in straps or a simple box with a lid. The top picks below are aimed at different traveler styles and power needs.
| Product | |||
|---|---|---|---|
| Camco Double Battery Box (55375) | Two 6V GC2 or two 12V 24/24M | Heavy-duty polymer, corrosion-resilient | |
| Attwood 9067-1 Vented Battery Box | Group 27 batteries | Integrated venting, secure mounting | |
| Camco Large Battery Box (55373) | Group 27, 30, 31 | Includes lid, straps, clamps | |
| Attwood 9084-1 Large Vented Box | Groups 29 and 31 | Vented design, rugged polypropylene | |
| Camco Large Battery Box (55372) | Group 27, 30, 31 | Straps and hardware included | Easy installation with mounting hardware |
Camco Double Battery Box — Safely Stores Two Batteries
This box is sized to hold either two 6V GC2 batteries or two 12V 24/24M batteries. The inner dimensions measure 21 ½ inches long by 7 3/8 inches wide by 11 3/16 inches high, making it a practical choice for mid-sized RV installations. It is constructed from a heavy-duty, corrosion-resilient polymer designed to protect contents from moisture and chemical exposure. This makes it a clear choice for travelers who need a straightforward, durable enclosure and plan to carry two batteries for essential systems like lighting and basic appliances. A potential limitation is that it does not include lid hardware in this listing, so consider compatible latches or straps if you need added security. Best for RV owners who want a simple, two-battery solution with solid protection and a roomy interior.
Attwood 9067-1 Vented Battery Box
This box is designed to fit larger marine and RV batteries up to about 10.5 inches tall. Interior measurements are 13.06 x 6.9 x 10.5 inches, with a safety vented design that allows gases to escape while the protective cover minimizes water intrusion. The polypropylene construction is acid-resistant and tested across a wide temperature range, supporting reliable operation in harsh outdoor environments. It’s best for travelers who run larger deep-cycle batteries and need a built-in venting solution to improve safety. A caveat is that larger batteries require careful fitment checks for clearance in tight compartments.
Camco Large Battery Box (55373) With Straps and Hardware
This box accepts Group 27, 30, and 31 batteries and comes with a lift-off lid, durable woven hold-down strap, foot clamps, and stainless steel screws. The box is lightweight yet heavy-duty, made from corrosion-resistant polypropylene. It provides robust protection for standard RV and automotive battery configurations, making it a versatile choice. Best for buyers who want a complete, ready-to-secure kit and straightforward mounting. A limitation is that it may be a tight fit in smaller compartments where space is at a premium.
Attwood 9084-1 Large Vented Battery Box
Designed specifically for Group 29 and 31 batteries, this box accommodates batteries up to 9 3/4 inches tall. Exterior dimensions are 18-7/8 by 9-1/4 by 10-1/4 inches, with inner dimensions of 15-7/16 by 6-15/16 by 9-3/4 inches. The durable polypropylene shell is acid-resistant and tested from -20°F to +120°F, ensuring performance in extreme conditions. Its vented design promotes gas release while reducing water intrusion, which helps extend battery life. Choose this if you need a higher-capacity box with reliable ventilation. Avoid if you require a compact enclosure in a tight space.
Camco Large Battery Box (55372) With Straps and Hardware
This box is built to fit Group 27, 30, and 31 batteries and includes a lift-off lid, a durable woven hold-down strap, foot clamps, and stainless steel screws. It’s a lightweight, heavy-duty, corrosion-resistant polypropylene enclosure designed for easy mounting in RVs and vehicles. Best for travelers who want a ready-to-install solution with included hardware. A limitation is that the internal footprint may be tight for unusually shaped batteries in some installations.
Buying Guide: How To Choose The Right Battery Box For Your Travel Trailer
- Battery Size Compatibility: Check interior dimensions to ensure your batteries fit with space for cables and ventilation. Larger Group 27/29/31 boxes suit bigger batteries; smaller models fit 6V GC2 sets.
- Ventilation and Gas Safety: If you use lead-acid or AGM batteries, opt for vented boxes to release gases safely. Look for integrated venting and a secure cover.
- Material Durability: Polypropylene is common for its corrosion resistance and light weight. Steel or steel-coated boxes add ruggedness but can be heavier.
- Security and Accessibility: Lids, straps, and mounting hardware help secure batteries during transit while allowing quick access when needed.
- Installation Space: Measure compartment depth, width, and height before buying to avoid fit issues in tight trailers or cargo bays.
- Best For If You Need: Dual-battery setups, single large batteries, or packages with pre-included straps and hardware.
FAQ
- What size battery can a typical RV battery box hold? Most boxes accommodate Group 27, 29, or 31 batteries, but always check inner dimensions before purchasing.
- Are vented battery boxes safer for gas-emitting batteries? Yes. Venting helps release hazardous gases while keeping water intrusion to a minimum, extending battery life.
- Should I choose a box with mounting hardware? Yes if you want secure installation and minimal movement while driving. Hardware reduces risk of battery shift.
- Is a lid necessary for all battery boxes? A lid improves containment and protects against debris; some boxes rely on external covers or clamps, depending on model.
- Can I use these boxes for marine and automotive applications? Yes, most are designed for RV, marine, and automotive setups, but verify fit with your specific battery type and vehicle layout.
- Do these boxes guarantee waterproofing? They offer water-resistance and protective seals, but no enclosure is 100% waterproof in submersion scenarios; avoid exposing batteries to direct water exposure.