bing tracking image
Customer Service My Orders
  1. Battery Boxes
  2. NOCO
  3. Camper Battery Box
  4. Equipment Battery Box
  5. Marine Battery Box
  6. Trailer Battery Box
Commercial Grade Battery Box for Dual 8D Batteries - Vented
Add to Cart
Used (1) from $144.60
NOCO

Commercial Grade Battery Box for Dual 8D Batteries - Vented

Part Number: 329-HM485
140 Reviews | 13 Questions
In Stock
$215.42
Retail:$265.99
You Save: $50.57
 Battery Boxes
1 used item available at $144.60
Add to cart
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

3d view icon
noco battery boxes group 8d 329-hm485
noco battery boxes camper box equipment marine trailer commercial grade for dual 8d batteries - vented
noco battery boxes 2 batteries 329-hm485
noco battery boxes 2 batteries 329-hm485
noco battery boxes camper box equipment marine trailer group 8d commercial grade for dual batteries - vented
noco battery boxes group 8d 2 batteries
noco battery boxes camper box equipment marine trailer 2 batteries commercial grade for dual 8d - vented
noco battery boxes camper box equipment marine trailer group 8d
noco battery boxes camper box equipment marine trailer 2 batteries 329-hm485
noco battery boxes camper box equipment marine trailer commercial grade for dual 8d batteries - vented
noco battery boxes group 8d 329-hm485
noco battery boxes camper box equipment marine trailer
noco battery boxes group 8d 2 batteries 329-hm485
noco battery boxes camper box equipment marine trailer group 8d
noco battery boxes camper box equipment marine trailer

Show All (16) Product Images

Show Fewer Product Images

Customer Photos

Commercial Grade Battery Box for Dual 8D Batteries - Vented customer photo

Show All (1) Customer Images

Show Fewer Customer Images

Videos

Show All (1) Videos

Show Fewer Videos

Need help with installation?
Locate installers near me
Battery box protects your automotive, marine, or RV battery against impacts, contaminants, and leaked battery acid. Ventilated lid features cable ports and locking knobs. Reinforced handles for safe grip. Molded plastic is impact and UV resistant. 1-800-940-8924 to order NOCO battery boxes part number 329-HM485 or order online at etrailer.com. Free expert support on all NOCO products. Great prices and Fastest Shipping for Commercial Grade Battery Box for Dual 8D Batteries - Vented. Battery Boxes reviews from real customers.
  • All Info
  • Reviews (140)
  • Q & A (0)
  • Related Parts
  • Photos
  • Used (1)

NOCO Battery Boxes - 329-HM485

  • Camper Battery Box
  • Equipment Battery Box
  • Marine Battery Box
  • Trailer Battery Box
  • Group 8D
  • 2 Batteries
  • Plastic
  • NOCO

Battery box protects your automotive, marine, or RV battery against impacts, contaminants, and leaked battery acid. Ventilated lid features cable ports and locking knobs. Reinforced handles for safe grip. Molded plastic is impact and UV resistant.


Features:

  • Battery box protects your automotive, marine, or RV battery against impacts, contaminants, and leaked battery acid
    • Great for installation on a boat, camper, motorhome, trailer, commercial equipment, and generators
  • Rugged, molded plastic is resistant to impact, UV rays, oil, gas, and battery acid
    • Maintains impact resistance in extreme conditions down to -20 F
  • Internal bumpers keep battery in place to prevent shifting and jolting
  • Ventilated lid secures to container with 2 bolt-down knobs
    • Multiple exit points allow dangerous acid vapors to be released safely
  • 8 Cable ports provide multiple battery wiring options with heavy gauge wire (4 AWG to 0 AWG)
  • Acid-resistant reservoir safely captures spilled battery acid inside the box
  • Reinforced handles ensure secure grip while carrying the battery
  • Meets Federal USCG 183.420 and ABYC E-10.7 requirements for marine use
  • Made in the USA


Specs:

  • Application: 12-volt lead-acid batteries
  • Battery size: dual 8D
  • External dimensions: 26-7/16" long x 24-7/16" wide x 12-1/2" tall
    • Internal dimensions: 23" wide x 21" long x 10-5/8" tall
  • Mounting base dimensions: 24-7/8" long x 22-7/8" wide
    • Mounting hole diameter: 5/16"
  • Temperature range: -20 F - 320 F
  • Weight: 16.4 lbs
  • 1-Year limited warranty


NOCO Commercial Battery Box for Dual 8D Batteries HM485 dimensional diagram



HM485 NOCO Commercial Grade Battery Box for Dual 8D Batteries - Vented







Customers Who Purchased This Battery Boxes Also Bought...



Customer Satisfaction Score:

Ratings & Reviews

4.6

140 reviews
5 Stars
(108)
4 Stars
(19)
3 Stars
(4)
2 Stars
(2)
1 Star
(7)
Review Sort Icon
by:
This box worked great to add batteries to my 5th wheel. Nice clean design, have 2 a size 24 and 2 size 27 batteries installed. Lots of room, 1 more battery of each size could be added. I did add a vent to top and bottom as this is in a enclosed compartment.
Customer Large Image
Customer Image
Click to Enlarge
by:
Perfect for holding two 200ah Renogy Lithium batteries in my 5th wheel.
by:
No comlaints and item has worked as expected. Great product and great customer service.
by:
Great storage. I put three batteries and a 3 bank charger in it and have had no issue. Great box.
by:
exactly what i was needing to hold 2 8D batteries
by:
I have used these in two locations already for communication equipment. It is a safe way to store the battery's supplying the backup power for this equipment.
by:
Solid, substantial product. Delivered on time at a decent price.
by:
by:
by:
by:
by:
Great fit for a lithium upgrade — minor mod required

Installed this in my 2023 Flagstaff Microlite 25FKS to replace the factory lead-acid battery, now housing a 12V 300Ah lithium (Litime) battery instead. Installation was straightforward overall — I did need to fabricate a small steel plate to adapt the mounting to where my old lead-acid battery sat, but that was a minor, quick modification.

The big win for me was keeping all the storage space inside the rig free rather than losing a compartment to the battery — this mounts on the front exterior tongue area, so my interior storage stays untouched. Solid plastic construction, ventilated lid, and plenty of room for the cables. Would recommend for anyone doing a similar lithium conversion who wants to keep their battery outside the living space.
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
Customer Large Image
Customer Image
Click to Enlarge
by:
I used this box to mount two 34M batteries on my RV on the trailer tongue. There was enough room to set the two batteries side by side. Worked well for this application.
Customer Large Image
Customer Image
Click to Enlarge
Lazer S. profile picture
Etrailer Expert

Lazer S.

1/13/2026

Nice! Glad it's working well for you. : ) What kind of camper did you install it on?

Larry profile picture

Larry

1/13/2026

@LazerS It’s a Grand Design Imagine 2150RB
by:
This has been an excellent addition to our trailer and holds our 300ah Lithium battery great. It is a very sturdy box and can take the weight of a 300ah battery with no issues. You will need to install some extra supports over your standard trailer battery mounts because this is a very large battery box. It just fit on our 2025 Cougar 22MLS.
by:
Received on time but came in the box with a defective hole that will leak. Etrailer immediately sent a new one and a return label for the old one. The new one arrived with both holes routed out! Poor quality control
by:
This fits my 460AH Lithium battery almost perfectly. It's rugged and should last almost indefinitely.
by:
I'm installing the new lithium battery system. I believe that this battery box will be too small and I'll return. However, I have not yet confirmed.
by:
The battery box for being a commercial grade leaves a lot to be desired. The construction of the box is paper
thin plastic. Definitely not comparable to previous 6 volt boxes. Hopefully it will last.
by:
Exactly what I needed. Very substantial battery box for my new lithium iron phosphate battery.
by:
It's plenty solid. I was concerned about getting it into the space on the tongue, but it fits. It's larger than I need for a single 300AH lithium battery, but large is better than small. I just wish battery box makers and lithium battery makers would coordinate on sizes.
by:
Bought to fit an eco-worthy 280ah lithium battery.
Fits great and does its job.
Read reviews of the cover holes not lining up, this is true.
Elongating the holes was needed but not that difficult.
by:
Box is perfect size for my new Lithium battery. Unfortunately I will need to return or exchange because the manufacturer, NOCO drilled the handscrew holes off location and do not line up with the lid holes...not even close! Etrailer shipped it out quickly and I received it in only a few days.
by:
It’ll work. The base is sturdy enough and is molded for extra rigidity. The top edges are warped but still usable. I do have to say it doesn’t rise to the price I paid. I didn’t have a choice and am thankful I was able to find one.
by:
Holes on the cover dont line up with the box to bolt the cover had to modify little. Fits the wattcycle 314Ah mini really well
by:
It’s big enough for the upsized lithium battery that I bought and that’s what I needed.
25
140
true
Show More Reviews

See what our Experts say about this NOCO Battery Boxes

Do you have a question about this Battery Box?
  • Recommended Battery Box for a 20" x 15" Battery
    No, I am sorry we do not have a lockable box for the Go Power Sun Cycle Advanced Lithium RV Battery item # GP26QR. Given it's odd shape of, 19-5/8" long x 14-7/8" wide x 8-11/16" tall, the only thing we have would be the Commercial Grade Battery Box for Dual 8D Batteries item # 329-HM485. It does work with lithium batteries but it is not lockable.
    view full answer...
  • Battery Enclosure for Dual Group 27 Batteries
    Thanks for letting us help. The dimensions on a Group 27 battery are approximately 12" long x 7" wide x 9" tall. The only battery box we carry that will have sufficient interior dimensions for two of these batteries in any orientation is the Commercial Grade Battery Box # 329-HM485. This box has interior dimensions of 23" wide x 21" long x 10-5/8" tall so you will have room to spare. Where are you looking to mount or store the battery box?
    view full answer...
  • Battery Box That Could Fit 4 8 SLI 8 Volt Batteries
    We aren't going to have a box that's going to fit either 8 or 16 of the battery dimensions you mentioned. The largest box we have is the part # 329-HM485 which has internal dimensions of 23" wide x 21" long x 10-5/8" tall.
    view full answer...
  • Battery Box Options for Dual Group 31 Batteries
    The TorkLift PowerArmor Solar Locking Battery Box part # TLA7700LS is not wide enough to fit two group 31 batteries. Group 31 batteries are 13" long by 6.72" wide by 9.44" tall. The only option that's big enough is the Commercial Grade Battery Box # 329-HM485. This is designed for dual 8D batteries which are a bit bigger, but it will work well with your two group 31 batteries. If you're set on a solar powered battery box, the only other option is to use a TorkLift PowerArmor battery box,...
    view full answer...
  • Recommended Battery Box for Four 12 Volt Interstate Batteries
    Assuming the Interstate batteries you have now are 10 5/16" long x 7 1/8" wide x 11" tall then I recommend the NOCO Commercial Grade Battery Box part # 329-HM485. This box measures 26-3/8" long x 24-3/8" wide x 12-1/2" deep. It is one of the few options we have that will hold four batteries of that size. This box has a secure ventilated lid which will work to release battery fumes, acid-resistant reservoir in case of an accident, and heavy-duty handles for easy maneuvering. It uses a 4-corner...
    view full answer...
  • Vented Battery Box Capable Of Storing 2 Group Size 29 Batteries
    The Commercial Grade Battery Box # 329-HM485 you found is going to be our only vented battery box which is capable of housing your 2 Group 29 batteries. The internal dimensions for this box are 23" wide, 21" long and 10-5/8" tall. If this is too large of a box you can use separate Battery Boxes # 329-HM318BKS to hold each battery individually.
    view full answer...
  • Battery Box to Store Four of the T105 Trojan Batteries
    Thanks for all of the pictures of your battery bank dimensions. Based on them the battery box part # 329-HM485 would easily fit all four and would work great for you.
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Battery Box Recommendation for Holding Two GC2 Group Batteries
    Typically battery group GC2 batteries are 11-7/16 inches tall, by 10-3/8 inches long, and 7-3/16 inches wide. For a battery box that could fit two of that size we have the NOCO Commercial Grade Battery Box for Group 4D Batteries # 329-HM485 which has internal dimensions of 21" long x 23" wide x 10-5/8" deep. While the height might seem a tiny bit too short the lid of the box allows for additional height. You'd need two boxes.
    view full answer...
  • Can NOCO Commercial Grade Battery Box 329-HM485 Fit Two Battery Size 27 and 24 Batteries
    The internal dimensions of the NOCO Commercial Grade Battery Box # 329-HM485 that you referenced are 23" wide x 21" long x 10-5/8" tall. Based on the picture you attached your batteries would fit and work well in this box.
    view full answer...
    Image 1 for
  • Battery Box Solution for Four 8D Batteries
    The 8D battery dimensions are Length 20-3/4" Width 11" Height 10" so while we have boxes that were designed for carrying two at a time like the Commercial Grade Battery Box for Dual 8D batteries # 329-HM485 we don't have any that fit up to four. I was not able to find any elsewhere that would fit up to four so this would be your best option.
    view full answer...
  • Battery Box For 4 Optima Blue Top Marine Batteries
    I'm assuming that you're speaking of an Optima Blue Top battery like their D34M which measures 10 inches long x 6.88 inches W x 7.8 inches tall. We do indeed offer a box that would accommodate 4 batteries of that size, with some room to spare. I'd recommend the # TLA7710R from Torklift. The box measures 58-1/2 x 7-5/8 x 12-3/4 inches, so it would accommodate up to 5 batteries of that size. Torklift doesn't offer a vent setup, but the box does slots for proper ventilation.
    view full answer...
  • Will Two 250AH Lithium Batteries Fit Inside the Commercial Grade Battery Box # 329-HM485?
    Yes, the Commercial Grade Battery Box # 329-HM485 will allow you to fit your two 250AH Lithium Batteries # 34282740. The box has an inside opening of 21" x 23" and 10-5/8" tall.
    view full answer...
  • Is NOCO Commercial Grade Battery Box for Dual 8D Batteries Stackable
    The Commercial Grade Battery Box for Dual 8D Batteries # 329-HM485 is designed to be placed on a solid surface so it doesn't have any grooves on the top or bottom to "fix" it together for stacking with another one. This is made with durable molded plastic but since batteries are so heavy if you tried stacking them the plastic would likely warp. This is the only dual 8D battery box we offer though so if that's the type of battery bank you have you'll just need to plan on using more real...
    view full answer...

Do you have a question about this Battery Box?


Used Items Available
Image of 329-HM485
Image of 329-HM485

Condition: Badly Dinged

Notes: The holes on the lid are damaged from a test fit. All hardware is included.

$144.60
Add to Cart
Secure Checkout

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee David F
Installed by:
David F
Employee Dustin K
Video by:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Alex H
Updated by:
Alex H
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.