9 Best Jayco External Battery Boxes (November 2026)

The best external battery boxes for Jayco RVs include the Newport Trolling Motor Smart Battery Box Power for an accessory power hub, the Camco Double Battery Box for two GC2 or Group 24 batteries, and the NOCO Snap-Top BGU1 Group U1 Battery Box for a compact Group U1 battery.

On this page (15 sections)

1. How we compared Jayco external battery boxes
2. Which battery box features matter for Jayco RVs?
3. Best Jayco external battery boxes compared
4. 1. Newport Trolling Motor Smart Battery Box Power: Best for an accessory power hub
5. 2. Camco Double Battery Box: Best for two GC2 or Group 24 batteries
6. 3. NOCO Snap-Top BGU1 Group U1 Battery Box: Best for a compact Group U1 battery
7. 4. NOCO HM408 Group 4D Commercial-Grade Battery Box: Best for one large Group 4D battery
8. 5. ALL-TOP Smart Battery Box: Best for multiple power connections
9. 6. Peastorm Trailer RV Marine Battery Box: Best for a lockable Group 27 enclosure
10. 7. POWO Carlife 12V Lifepo4 Battery Box for 30/20/10A: Best for a small LiFePO4 battery
11. 8. GEARMEISTER Trolling Motor Power Center Station Battery: Best for Group 24, 27 or 31 batteries
12. 9. B&D RV Battery Lock RV Locking Battery Strap: Best for added theft resistance
13. How should you choose a battery enclosure for a Jayco?
14. How do mounting, ventilation and cable access affect fit?
15. Final pick: which Jayco external battery box should you choose?

The best Jayco external battery box depends on your battery group, available space and how you use the connections. The Camco Double Battery Box is the clearest fit for two GC2 or two Group 24/24M batteries, while the NOCO BGU1 suits a single compact Group U1 battery.

Jayco layouts vary by model and battery installation. Measure the battery and mounting area before choosing an enclosure, then account for cable bends, terminal access and the room needed to secure the box.

For context on wiring and charging, start with our RV battery systems explained guide. This roundup compares stated battery compatibility, interior measurements, mounting details and useful connections, without assuming every box fits every Jayco.

Our picks at a glance

1. 1
   Best for an accessory power hub

   Newport Trolling Motor Smart Battery Box Power

   9.7/10 our score

   See it on Amazon
2. 2
   Best for two GC2 or Group 24 batteries

   Camco Double Battery Box

   9.6/10 our score

   See it on Amazon
3. 3
   Best for a compact Group U1 battery

   NOCO Snap-Top BGU1 Group U1 Battery Box

   9.4/10 our score

   See it on Amazon

4. 4

   NOCO HM408 Group 4D Commercial-Grade Battery Box

   Best for one large Group 4D battery
   Check it
5. 5

   ALL-TOP Smart Battery Box

   Best for multiple power connections
   Check it
6. 6

   Peastorm Trailer RV Marine Battery Box

   Best for a lockable Group 27 enclosure
   Check it
7. 7

   POWO Carlife 12V Lifepo4 Battery Box for 30/20/10A

   Best for a small LiFePO4 battery
   Check it
8. 8

   GEARMEISTER Trolling Motor Power Center Station Battery

   Best for Group 24, 27 or 31 batteries
   Check it
9. 9

   B&D RV Battery Lock RV Locking Battery Strap

   Best for added theft resistance
   Check it

How we compared Jayco external battery boxes

The best Jayco external battery box is the one that matches the battery and the available installation space. We compared stated battery groups, interior measurements, hold-down methods, cable access and power connections.

Fit comes first. A box described for Group 27 still needs to match the battery's actual dimensions, and the outer enclosure must fit the Jayco's compartment or mounting location.

We also separated basic protective enclosures from power-center designs. Power centers add ports and monitoring, while a standard enclosure may be a better match when protection and secure mounting are the main goals.

Our score weighs specs, features and buyer feedback against what you're shopping for.

Which battery box features matter for Jayco RVs?

Battery group, interior dimensions and mounting space matter more than a long list of ports. Check those first, then decide whether ventilation, cable access or added outlets solve a real need in your RV.

How should you match battery group and dimensions?

Use the battery's group designation as a starting point, not a guarantee of fit. Compare its measured length, width and height with the box's interior dimensions, and make sure the terminals and cables have room once the lid is closed.

A 4D box, for example, has a much larger footprint than a U1 enclosure. If you need help deciding which battery type belongs in your RV, read our RV battery vs car battery comparison.

What should you measure on the Jayco?

Measure the full space available, including height under a lid or seat and clearance around the battery terminals. Check the outside box dimensions when available, because interior fit alone does not show whether the enclosure will fit the RV compartment.

Also look for the box's mounting method. Straps, bolt-down slots, trays and locking brackets need a surface and clearance that work with the installation.

Do you need a power-center box?

A power-center box can be useful if you need external terminals, USB charging or a 12V outlet near the battery. Those features add wiring and connection choices, so match them to your electrical plan rather than assuming more ports are automatically better.

Before adding an external battery to a portable station, review how external batteries work with power stations. For a portable station that can run a vehicle fridge, see our car fridge power station guide.

That setup is different from a typical RV house-battery installation.

Best Jayco external battery boxes compared

The Camco double enclosure is the most directly specified option for two GC2 or Group 24/24M batteries, while other picks target individual battery groups or extra connection options. Use the comparison table to narrow the choices, then verify the exact fit for your Jayco.

1. Newport Trolling Motor Smart Battery Box Power: Best for an accessory power hub

1

Newport Trolling Motor Smart Battery Box Power: Best for an accessory power hub

9.7/10Our score

• External battery terminals
• USB and 12V DC ports
• 10A and 60A circuit breakers
• Lead-acid batteries only

A portable power center with external terminals, USB and 12V DC ports, plus a built-in battery meter. Newport says it is not compatible with lithium-ion batteries.

See it on Amazon

Pros

• External connections without opening the box
• USB and 12V DC ports
• Built-in battery meter

Cons

• Not compatible with lithium-ion batteries
• Designed as a marine power center

The Newport Vessels box is a marine power center with external battery terminals, USB and 12V DC ports. Its dimensions are 10.5 x 17 x 14 in, so compare that footprint with the battery area before considering it for a Jayco.

The built-in meter shows battery status, and Newport includes 10A and 60A circuit breakers. The design is intended for lead-acid batteries only, so it is not a match for a lithium-ion battery.

The box makes the most sense when you want an organized way to connect accessories as well as enclose a compatible battery. It is designed around boating use, so check whether its shape and mounting approach suit your RV location.

Choose it for a lead-acid setup where the ports are useful. If you have a lithium battery or need a conventional RV enclosure, compare the other options first.

2. Camco Double Battery Box: Best for two GC2 or Group 24 batteries

2

Camco Double Battery Box: Best for two GC2 or Group 24 batteries

9.6/10Our score

• Holds two 6V GC2 or two 12V Group 24/24M batteries
• Inner dimensions 21.5 x 7.375 x 11.1875 in
• Two straps and four strap clamps included
• Corrosion-resilient polymer

This box is sized for two 6V GC2 batteries or two 12V Group 24/24M batteries. Its stated interior dimensions and included straps help owners check fit and securement.

See it on Amazon

Pros

• Supports two common battery configurations
• Includes straps and clamps
• Corrosion-resilient polymer construction

Cons

• Only fits the listed two-battery configurations
• Check available mounting space against the inner dimensions

The Camco box is the clearest choice here for a two-battery bank using two 6V GC2 batteries or two 12V Group 24/24M batteries. Its interior measures 21.5 x 7.375 x 11.1875 in, and the package includes two straps and four clamps.

That interior length can help owners check a paired battery arrangement, but the Jayco installation still needs to fit the box's outer dimensions and allow for cable routing. Confirm the exact space and terminal positions before buying.

Camco uses a corrosion-resilient polymer shell. The stated Coast Guard and ABYC specifications apply when the box is used with two 6V GC2 batteries.

This is a practical pick when your RV uses one of those two-battery configurations and you want hold-down parts included. It is not intended as a general fit for all battery groups.

3. NOCO Snap-Top BGU1 Group U1 Battery Box: Best for a compact Group U1 battery

3

NOCO Snap-Top BGU1 Group U1 Battery Box: Best for a compact Group U1 battery

9.4/10Our score

• Sized for one 12V Group U1 battery
• Inside dimensions about 8.3 x 5.3 x 7.6 in
• Mounting tray and 36 in strap included
• Cable ports on front and sides

The NOCO BGU1 is sized for one Group U1 battery and includes a mounting tray with a 36 in hold-down strap. Cable ports on the front and sides offer routing choices.

See it on Amazon

Pros

• Group U1 sizing is clearly stated
• Tray and strap included
• Front and side cable ports

Cons

• Too small for larger battery groups
• Check usable space against the battery's actual dimensions

The NOCO BGU1 is sized for one 12V Group U1 lead-acid, AGM or lithium battery. Its inside dimensions are about 8.3 x 5.3 x 7.6 in, with cable entry ports on the front and sides.

A mounting tray and 36 in strap are included, giving you options for securing the box. NOCO also describes pre-drilled internal pilot holes for a screw-down installation.

This small size makes it a specialized choice rather than a general Jayco house-battery enclosure. Check the battery dimensions and whether the tray or screw-down method works at your intended mounting point.

Choose it when your battery is actually Group U1 and you need a compact enclosure. A larger house battery will need a different box.

4. NOCO HM408 Group 4D Commercial-Grade Battery Box: Best for one large Group 4D battery

4

NOCO HM408 Group 4D Commercial-Grade Battery Box: Best for one large Group 4D battery

9.1/10Our score

• Fits one Group 4D battery
• Inside dimensions 21.2 x 9.6 x 11.1 in
• Four-corner bolt-down slots
• Mounting hardware and strap sold separately

The HM408 accommodates one Group 4D battery and has four-corner bolt-down slots. Its larger outside footprint makes a careful Jayco compartment measurement essential.

See it on Amazon

Pros

• Sized for a single Group 4D battery
• Full-flow ventilation
• Captive lid with two hold-down knobs

Cons

• Mounting hardware and hold-down strap sold separately
• Large outer footprint needs room to spare

The NOCO HM408 is built around one Group 4D battery, with interior dimensions of 21.2 x 9.6 x 11.1 in. The outside measures 24.7 x 13 x 14 in, so check the Jayco mounting footprint carefully.

Four-corner bolt-down slots help secure the enclosure, and two knobs hold its captive lid. Full-flow ventilation allows charging gases to escape, while large cable openings accommodate heavy-gauge cables.

The box includes the enclosure and fastening knobs, but mounting hardware and a hold-down strap are sold separately. Factor those parts into your installation plan.

Consider the HM408 only if your battery is Group 4D and the outside size fits. Its larger enclosure may be unsuitable for tighter battery compartments.

5. ALL-TOP Smart Battery Box: Best for multiple power connections

5

ALL-TOP Smart Battery Box: Best for multiple power connections

9.0/10Our score

• Compatible 12V–24V batteries if they fit
• Two 50A quick connectors
• USB ports and 12V cigarette socket
• Digital voltmeter and circuit protection

The ALL-TOP turns a compatible battery into a power center with USB, a 12V socket and two 50A connectors. It has no internal fixing frame, so a smaller battery may not stay suitably positioned.

See it on Amazon

Pros

• Several external power connections
• Digital voltmeter
• Compatible with several battery groups if they fit

Cons

• Battery size must be checked carefully
• External positive and negative terminals are not fused

The ALL-TOP box adds two 50A quick connectors, USB ports, a 12V socket and a digital voltmeter. It can work with 12V–24V batteries if they fit the box, including several common groups, but it has no internal fixing frame.

That missing frame matters if your battery is smaller than the enclosure. Check how the battery will be held in place and whether the external terminals, connectors and charging ports match your intended wiring.

The box has 60A fuses at each quick connector and a 16A resettable breaker for the USB and cigarette socket ports. The external positive and negative terminals are unfused, so plan connections accordingly.

Choose this model when multiple connection types are useful and the battery can be secured properly. It is less suitable when you need a simple enclosure with a clearly stated internal fit.

6. Peastorm Trailer RV Marine Battery Box: Best for a lockable Group 27 enclosure

6

Peastorm Trailer RV Marine Battery Box: Best for a lockable Group 27 enclosure

8.9/10Our score

• Designed for Group 27 batteries
• Maximum capacity 13.78 x 7.8 x 11 in
• Steel enclosure with lock and rubber-ringed openings
• Bottom fixing holes and screws included

This steel enclosure is designed for a Group 27 battery and includes a lock, screws and rubber rings for reserved openings. Measure your battery and mounting area against its stated maximum capacity.

See it on Amazon

Pros

• Group 27 fit is specified
• Lock and mounting screws included
• Rubber rings protect reserved openings

Cons

• Maximum battery dimensions need to be checked
• Steel enclosure may not suit every Jayco mounting location

Peastorm's steel box is designed for a Group 27 battery and includes a lock, four rubber rings and mounting screws. Its stated maximum battery capacity is 13.78 x 7.8 x 11 in, so compare those measurements with your battery before choosing it.

Handles on both sides help with handling the enclosure, while reserved bottom fixing holes support mounting. The lockable cover may suit an exposed installation where added access control is useful.

The stated product dimensions describe the outside of the enclosure, while the maximum capacity gives the available battery size. Leave room for terminals and cables, and verify that the box fits the Jayco's location.

Choose it for a Group 27 installation where a steel enclosure and lock are priorities. Skip it if the battery or available space exceeds the stated measurements.

7. POWO Carlife 12V Lifepo4 Battery Box for 30/20/10A: Best for a small LiFePO4 battery

7

POWO Carlife 12V Lifepo4 Battery Box for 30/20/10A: Best for a small LiFePO4 battery

8.7/10Our score

• For batteries from 10Ah to 30Ah
• QC3.0 and QC3.0 plus PD charging ports
• 30A overload protection
• Anderson plug for solar charging

The POWO Carlife box is aimed at compact batteries from 10Ah to 30Ah, with an Anderson plug and charging ports. Confirm battery dimensions because capacity alone does not guarantee fit.

See it on Amazon

Pros

• Suitable capacity range is specified
• Anderson plug supports solar charging
• Built-in 30A protection

Cons

• No box dimensions are available here
• Designed for smaller batteries, not a full-size house battery

The POWO Carlife box targets smaller batteries from 10Ah to 30Ah, with 30A terminals, overload protection and an Anderson plug. It also has QC3.0 and QC3.0 plus PD charging ports.

The Anderson connection supports solar charging, but the box dimensions are not stated here. Confirm the actual battery size and enclosure measurements before planning a Jayco installation.

This is a niche option for a compact battery used for an auxiliary job, not a clear substitute for a full-size house-battery box. For solar charging basics, see how to charge an RV battery with solar.

Choose it when your battery falls within the stated capacity range and the dimensions fit. For charge-controller choices, our guide to external vs. integrated solar charge controllers explains the difference.

8. GEARMEISTER Trolling Motor Power Center Station Battery: Best for Group 24, 27 or 31 batteries

8

GEARMEISTER Trolling Motor Power Center Station Battery: Best for Group 24, 27 or 31 batteries

8.2/10Our score

• Compatible with Group 24, 27 and 31 batteries
• Internal dimensions 13.3 x 7.6 x 8.8 in
• USB-A, USB-C, 12V socket and two 50A plugs
• Built-in voltmeter

This power center fits stated Group 24, 27 and 31 sizes, subject to the battery's actual dimensions. Its internal dimensions give Jayco owners a useful starting point for checking fit.

See it on Amazon

Pros

• Several common group sizes are named
• Multiple charging connections
• Built-in voltmeter

Cons

• Check battery and compartment dimensions before choosing
• The product information gives conflicting circuit-breaker ratings

GEARMEISTER's power center is designed for Group 24, 27 and 31 batteries and has internal dimensions of 13.3 x 7.6 x 8.8 in. Compare both the battery size and the outside dimensions with your Jayco's available mounting area.

Connections include USB-A, USB-C, a 12V socket and two 50A plugs, along with a built-in voltmeter. The stated product details give conflicting circuit-breaker ratings, so don't rely on that feature without confirming the exact configuration.

Its multiple ports may help when you need a power hub near the battery. The dimensions and breaker information make careful fit and setup checks especially important.

Choose it when your battery is one of the named groups and its dimensions fit. If you only need a protective shell, a simpler enclosure may be easier to evaluate.

9. B&D RV Battery Lock RV Locking Battery Strap: Best for added theft resistance

9

B&D RV Battery Lock RV Locking Battery Strap: Best for added theft resistance

8.0/10Our score

• Fits standard single Group 24 and Group 27 boxes
• Steel locking bracket
• Disc-style padlock required and not included
• Measures about 10.375 x 8.625 x 1.25 in

This locking bracket is designed for standard single Group 24 and Group 27 boxes. It adds a separate security measure, but you need to supply a compatible disc-style padlock.

See it on Amazon

Pros

• Fits common single-battery box groups
• Steel bracket secures the box to the trailer structure
• Quick installation without tools

Cons

• Padlock sold separately
• Does not fit tall 12V or 6V box configurations

The B&D bracket is a locking accessory for standard single Group 24 and Group 27 boxes, not a replacement battery enclosure. It secures a compatible box to the trailer structure, and you need to supply a disc-style padlock.

The bracket measures about 10.375 x 8.625 x 1.25 in. Check whether your existing box and battery mounting area allow the bracket to sit correctly before ordering.

B&D says the bracket uses 3/16 in steel with a powder-coated finish. It is not intended for tall 12V or 6V box configurations, so confirm the box style as well as its battery group.

Choose it as an added security measure for a compatible single-battery box. It won't solve a fit problem or replace proper battery hold-downs.

How should you choose a battery enclosure for a Jayco?

Choose the enclosure that matches the battery group and fits both the battery area and the RV's mounting space. A larger box can offer more room for cables, but it also needs more space and a suitable way to secure it.

Start with the battery label and measure its actual dimensions. Then compare interior dimensions for battery fit and exterior dimensions for compartment fit.

If you are replacing a starter battery, verify that it is the right type for the job. Our RV battery vs car battery guide explains how their roles differ.

For a two-battery bank, the Camco is the most clearly specified option in this group. For one Group U1 battery, the NOCO BGU1 is the direct size match; for Group 4D, consider the HM408 only if its large footprint fits.

How do mounting, ventilation and cable access affect fit?

Mounting and cable access can determine whether an otherwise compatible box works in your Jayco. Check how the box attaches, where cables enter and whether the lid can open after installation.

The Camco includes straps and clamps, the NOCO BGU1 includes a tray and strap, and the HM408 has bolt-down slots but requires separate mounting hardware. The Peastorm includes screws for its bottom fixing holes.

Ventilation also differs. The NOCO HM408 describes full-flow ventilation, while the BGU1 has optional ventilation holes; follow the battery and RV instructions when planning enclosure airflow.

Before installation, confirm polarity, cable reach and terminal clearance. Use the RV's wiring instructions or a qualified technician if you are unsure about a connection.

Final pick: which Jayco external battery box should you choose?

Choose the Camco Double Battery Box for two GC2 or Group 24/24M batteries when the space fits. Pick the NOCO BGU1 for one Group U1 battery, the HM408 for one Group 4D battery, or a power-center model when its extra ports serve a clear purpose.

Measure the battery, enclosure space and cable path before ordering. For a broad comparison of enclosures, see our guide to the best battery box for an RV.

Our top 3 picks at a glance

1. 1
   Best for an accessory power hub

   Newport Trolling Motor Smart Battery Box Power

   9.7/10 our score

   See it on Amazon
2. 2
   Best for two GC2 or Group 24 batteries

   Camco Double Battery Box

   9.6/10 our score

   See it on Amazon
3. 3
   Best for a compact Group U1 battery

   NOCO Snap-Top BGU1 Group U1 Battery Box

   9.4/10 our score

   See it on Amazon

Frequently asked questions

How do I choose an external battery box for a Jayco RV?

Start with the battery group and its measured length, width and height, then compare those with the box's interior dimensions. Measure the Jayco compartment or mounting area too, including room for cables, terminals, lid access and hold-downs.

Also check whether the box is meant for your battery chemistry and whether its mounting method suits the location.

Will a Group 27 battery box fit any Jayco?

No single battery group or box fits every Jayco layout. A Group 27 box only helps if the battery itself fits inside and the box fits the RV's available space.

Check the trailer manual and measure the compartment before choosing a replacement enclosure.

Can I use a battery power center with a Jayco house battery?

You can consider one if its battery compatibility, dimensions, wiring and connections match your setup. Power centers add ports and external terminals, but the ports do not replace correct battery wiring or the RV's charging system.

Review the RV battery system basics before changing how your house battery connects.

Does a battery box charge an RV battery?

A protective box does not charge a battery by itself. Some power-center boxes provide connection ports or an input path, but charging still depends on a suitable charger, solar controller or RV charging system.

For solar charging, see our guide to charging an RV battery with solar.