The best double battery box for an RV depends on battery size, installation space, and whether you need ventilation or a metal enclosure. The Camco double box is a practical choice for two GC2 or Group 24 batteries; Camco’s vented kit is better for a compartment installation that needs a hose and vent grille. Peastorm’s steel options suit buyers seeking a lockable metal enclosure, while Sidasu provides stated interior dimensions for fit checks.
| Product | Best For | Key Feature |
|---|---|---|
| Camco Double Battery Box | Two GC2 or Group 24 batteries | Corrosion-resilient polymer |
| Camco Side-By-Side Box | Vented RV compartment setups | Hose and vent grille included |
| Peastorm Steel Box | Lockable metal storage | Coated steel construction |
| Peastorm Stainless Steel Box | Stainless steel enclosure preference | Lockable cover and cable openings |
| Sidasu Stainless Steel Box | Buyers checking exact dimensions | Published interior and exterior measurements |
Camco Double Battery Box
Best for: RV owners storing two 6-volt GC2 batteries or two 12-volt Group 24/24M batteries in a durable polymer enclosure.
This Camco box has interior dimensions of 21½ inches long, 7⅜ inches wide, and 11 3/16 inches high. Its heavy-duty, corrosion-resilient polymer construction is designed to help protect batteries. The listed capacity and measurements make it easier to compare against a battery’s actual dimensions before buying.
Why it was selected: It directly fits the common two-battery configurations specified in the product details and gives buyers clear interior measurements.
Limitation: The listed capacity covers GC2 and Group 24/24M batteries; confirm your battery dimensions and terminal clearance rather than assuming other sizes will fit.
Camco Side-By-Side Vented Box
Best for: RV owners installing two Group 24 batteries in a storage compartment where a vented setup is needed.
This side-by-side box holds two Group 24 batteries and is described as having a vented design to expel hazardous gases. The package includes a hose, hose mount plate, louvered vent grille, foam tape, and mounting and installation hardware. Those included parts make it a more complete option for buyers planning a vent route than a box-only product.
Why it was selected: It combines dual-battery capacity with listed vent components for motorhomes, travel trailers, toy haulers, and other RV types.
Limitation: Its stated capacity is two Group 24 batteries. Check the compartment dimensions and intended vent installation before choosing it.
Peastorm Coated Steel Double Box
Best for: Buyers who prefer a metal double-battery enclosure with a lockable cover and mounting provisions.
Peastorm describes this box as heavy-duty steel with a black surface coating. Features include handles on both sides, a cover that can be locked, rubber-protected reserved openings, and bottom fixing holes with screws included. The product is intended for double-battery setups and lists RV, trailer, marine, and camping use.
Why it was selected: It offers a different construction approach from polymer boxes and includes practical features for carrying, securing, and mounting the enclosure.
Limitation: The supplied details do not state interior dimensions or specific battery group sizes. Measure your batteries and confirm the fit before purchase.
Peastorm Stainless Steel Double Box
Best for: RV or marine buyers seeking a stainless steel enclosure with a lockable lid and mounting holes.
This Peastorm model is made from stainless steel and is described as waterproof, sunscreen-resistant, and fireproof. It has side handles, a lockable upper cover with a lock included, rubber-ring-protected openings, and bottom fixing holes with screws. Like the coated steel option, it is designed for double-battery applications across settings including RVs and trailers.
Why it was selected: It gives buyers who want a stainless steel construction an alternative to the black-coated steel version, while retaining similar access and mounting features.
Limitation: No interior dimensions or battery group compatibility are supplied in the provided details, so verify fit and cable routing.
Sidasu Stainless Steel Battery Box
Best for: Buyers who want published enclosure dimensions to compare with their batteries and available RV space.
Sidasu lists interior dimensions of 21.7 by 8 by 11 inches and exterior dimensions of 22.6 by 9 by 12.2 inches. The stainless steel box has a black anti-rust coating, a waterproof top cover, and a raised-base design that provides clearance from the ground. Its stated exclusions are especially useful: it is not suitable for extra-large batteries such as 4D, 8D, Wide 31, or Wide 65, or batteries wider than 8 inches or taller than 11 inches.
Why it was selected: The measurements and explicit size exclusions help shoppers screen for fit before ordering.
Limitation: Measure the complete battery, including any high cover or terminals, and keep within the listed interior limits.
Buying Guide: How To Choose A Double RV Battery Box
Which battery size does the box need to hold?
Start with the battery’s group size and actual length, width, and height. A box listed for two GC2 or Group 24 batteries is not automatically suitable for other formats. Compare the battery dimensions with the enclosure’s interior measurements, and allow room for terminals and cable connections where the design requires it.
Should you choose polymer or metal?
Polymer options such as the Camco models are described as corrosion-resistant or heavy-duty plastic. Metal options may appeal to buyers who specifically want a steel or stainless steel enclosure. Material alone does not confirm fit or installation suitability, so also check dimensions, mounting points, and the product’s stated features.
Do you need a vented box?
Consider the battery type, RV compartment, and installation requirements before choosing a vented product. The Camco side-by-side model includes a hose and vent grille, while the basic Camco double box listing does not specify those parts. Follow the battery manufacturer’s installation guidance and verify that the enclosure and vent arrangement suit your setup.
How should you compare lock and mounting features?
If the box needs to be secured in place or opened less easily, compare its listed mounting holes, included screws, straps, clamps, and cover-lock details. These features differ by model. Check the product listing for the exact hardware included rather than assuming accessories are interchangeable.
Frequently Asked Questions
What batteries fit the Camco double battery box?
The listed Camco box holds two 6-volt Group GC2 batteries or two 12-volt Group 24/24M batteries. Check the stated interior dimensions against your battery measurements.
Does the Camco side-by-side box include vent parts?
Yes. The listed package includes a hose, hose mount plate, and louvered vent grille, along with foam tape and installation hardware.
Are the Peastorm steel boxes listed for specific battery group sizes?
The supplied product details describe double-battery use but do not name specific group sizes or interior dimensions. Confirm the fit with the seller’s current listing before ordering.
Which listed box has the clearest size exclusions?
The Sidasu box lists interior and exterior dimensions and says it does not fit certain extra-large batteries or batteries wider than 8 inches or taller than 11 inches.
Can I use any double battery box for any RV battery?
No. Capacity, battery dimensions, compartment space, and venting needs vary. Match the box to your batteries and installation requirements before purchase.