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-HM426 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 6V Batteries - Vented. Battery Boxes reviews from real customers.
All Info
Reviews (140)
Q & A (0)
Related Parts
Photos
NOCO Battery Boxes
- 329-HM426
Camper Battery Box
Equipment Battery Box
Marine Battery Box
Trailer Battery Box
6V
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: 6-volt marine, RV, and commercial lead-acid batteries
Battery size: dual 6V
External dimensions: 17-15/16" long x 14-5/16" wide x 14" tall
Internal dimensions: 14-5/8" long x 10-1/2" wide x 11-1/2" tall
Mounting base dimensions: 16-11/16" long x 12-5/8" wide
Mounting hole diameter: 5/16"
Temperature range: -20 F - 320 F
Weight: 7 lbs
1-Year limited warranty
HM426 NOCO Commercial Grade Battery Box for Dual 6V Batteries
WARNING: California Proposition 65
WARNING: This product contains chemicals, including lead, known to the State of California to cause birth defects or other reproductive harm. Wash hands after handling. For more information, go to www.p65warnings.ca.gov.
Customers Who Purchased This Battery Boxes Also Bought...
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. 3592693
by:
Michael
07/28/2026
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. 3595744
by:
maadman
01/08/2026
Heavy duty construction. Bolt holes on outside corners for installation. Wish they were on inside to help defer theft. Will drill holes for water drainage and to mount. Have to modify or build new mount on a-frame. 3473564
by:
John
11/09/2021
Good battery box that fits my SOK 206Ah lithium battery. Well built and easy to install. I did drill a small hole in the bottom in case water was able to enter the box. 1198922
A great hard case for 2/6 volt batteries. Gives it a clean look. Used these boxes when I was a marine engineer. They contain all the battery liquids from batteries boiling over when charging. 1199153
by:
Jack
04/08/2020
Replaced POS un-vented battery box installed by dealer in my 2016 Coachmen. New box holds my two 6v batteries secure and safe. I ordered and installed fresh air vent to keep gasses vented to outside. Unit is very durable and a definite up-grade. 775912
by:
Harry
01/23/2021
Just installed the box today. Verdict is still out. I'll have to cut two holes 1 3/4" in the top to insert bushing so that I can attach my vent hoses. Thought the walls would be thicker. Not sure the "feet" made for the anchor screws / bolts are going to work. They seem a little shallow, but I think it is anchored pretty good. I used self tapping metal screws to hold it to the floor and keep it from sliding around. My two Trojan T-105 6v batteries fit perfectly. I haven't attached the lid yet as I'm working on the vents. So far I'm pretty happy with my purchase. 942137
by:
Mark
07/19/2022
Just as advertised. Installed in RV in place of single 12V battery box. Perfectly accommodates 2 GC2 golf cart batteries. 1332890
by:
Tom
07/31/2020
I just received the new battery box, the quality looks good. I like the secure cover. This should provide ample power one I have the batteries installed to run my 12 Refrigerator a couple days. 853532
by:
Chad
11/14/2022
It is very light, durable, and easy to install. It is exactly what I was looking for. It will fit perfectly in my boat, keeping my batteries stable and out of the weather. 1468407
by:
William
05/10/2019
Just what i needed for a dual battery setup. Im going to try to fit a solar controller in with batteries, I think I can make it happen. The sides of box could be a little thicker, but great product. 640677
by:
Eric C
03/30/2020
Worked great for what I wanted it for. etrailers Excellent to work with! 772381
by:
Bob
07/26/2025
Haven't installed as of yet,it looks like it will do the job. 3378030
by:
Don
08/12/2020
Well built battery box. Will be used for 2 12v batteries in parallel for RV Trailer. 861044
by:
Chuck
07/06/2023
A very well made product. Fit the battery compartment in my RV perfectly... 1615946
by:
Jeff
01/25/2023
Fantastic customer service and shipping1507691
by:
Eric
08/23/2019
Just what I ordered. Solid construction! Using it in the front of our RV for the batteries. 693155
by:
Jeffrey
05/13/2021
This box works well. Sturdy, reliable.1036156
by:
Brandon
12/04/2021
The box is as advertised and shipped quickly. I couldn't ask for more. 1217222
by:
Bob H
01/18/2020
Worked great. 739141
by:
Kyle Baker/Galpin Auto Sports
10/23/2019
Just want to thank you for going above and beyond in informing us of that status of our orders. I don't even have to request it.
The internal dimensions of the NOCO Commercial Grade Battery Box # 329-HM426 are 14-5/8" long x 10-1/2" wide x 11-1/2" tall. The dimensions of the Trojan T-105 batteries are 10.30 inches wide, 7.11 inches deep, and 11.07 inches tall which means that two of these would fit really well in the NOCO box!
I attached a review video for this box for you to check out as well. view full answer...
Hey Donald,
The battery box # 329-HM426 is a great fit for 2 6v batteries. In terms of it fitting on your trailer that just depends on the room you have to mount it. The actual size of the box is 17-15/16" long x 14-5/16" wide x 14" tall. So as long as you have a spot that it can fit this is going to work great for you.
How often are you able to get out with that trailer? view full answer...
Hello Tim, thanks for reaching out. We currently offer one battery boxes that will fit your Trojan T1275 Deep Cycle Battery, and that is the following:
- Commercial Grade Battery Box for Dual 6V Batteries - Vented # 329-HM426
This battery box has inside dimensions of 14-5/8" long x 10-1/2" wide x 11-1/2" tall so it is slightly larger than your battery. There will be a bit of room to spare inside the box but it will fit. view full answer...
Hey Robbie, thanks for reaching out!
The Snap-Top Battery Box # 329-HM318BKS measures 14-5/8" long x 8" tall x 7" wide internally so it won't be able to accommodate your battery, but we do have the Noco # 329-HM426 which measures 14-5/8" long x 10-1/2" wide x 11-1/2" tall internally and would be a great alternative for your application.
You'll have a little extra room inside and you'll need to find a way to secure the box in the trunk of your '68 Torino (which is a beauty), but this will... view full answer...
Hey Richard,
For a spare tire with tire size ST205/90R15 you would need the Universal Spare Tire Cover # 052963753875. Your tire size has a 29.53" overall diameter so this will fall almost in the middle of its 29" to 31" capacity range. It's made of a heavy-duty vinyl that can help block UV rays from dry rotting your spare. It has an elastic hem with hooks at the bottom for snug fit so that the cover won't blow away while you're out on the road. view full answer...
I recommend the NOCO Commercial Grade battery box part # 329-HM484 to hold both of the group 24 batteries. From my research a group 24- 12 volt battery measures 10.25" long x 6.8125" wide x 8.875" tall. This battery box measures 21" long x 11-13/16" wide x 10-5/16" tall of internal usable space. This is the most cost effective box that we carry that is spacious enough for the 2 batteries. I would measure the regulator and make sure it can fit with the two batteries though. I have attached... view full answer...
I do have thoughts, and while we do have battery boxes that will allow you to mount four 6 volt batteries, you simply do not have enough room inside your A-frame at the front to store that many batteries. Instead, you will need to mount them on top of the frame and the best option for this is two of the NOCO Commercial Grade Battery Box for Dual 6V Batteries # 329-HM426 which measures 17-15/16" long x 14-5/16" wide x 14" tall and has ports which allow them to be wired.
I have added a link... view full answer...
We only have one single battery box that will fit the battery size you mentioned needing. For that we have the NOCO part # 329-HM426 which measures 17-7/8L x 14-5/16W x 14D Inch. Nothing we offer will fit two batteries of this size though. view full answer...
So the internal dimension of the NOCO Dual Battery Box # 329-HM426 that you referenced is 14-5/8" long x 10-1/2" wide x 11-1/2" deep. For a similar box that will fit both of your batteries you'd want the NOCO part # 329-HM408 which has internal dimensions of 21-3/16" long x 9-5/8" wide x 11-1/8" deep. The underside of the box has 4 bolt holes already setup for attaching to your channel as well. view full answer...
For 6-volt battery boxes we have a couple options to hold your two 6V lifeline GPL-4CT batteries. I was able to see that this battery is 10.28" long, 7.06" wide and 9.92" tall.
First is the Commercial Grade Battery Box # 329-HM426 which is designed to hold 2 6 volt batteries. The interior dimensions are 14-5/8" long, 10-1/2" wide and 11-1/2" tall. The Exterior is 17-15/16" long, 14-5/16" wide and 14" tall.
Next the TorkLift PowerArmor Solar Locking Battery Box # TLA7712RS will allow... view full answer...
The dual battery box part # 329-HM426 would fit two of the Go Power Sun Cycle Solar RV Battery # 34277606 that you referenced. The outside dimensions of the box are also compatible with the space you mentioned having as well. view full answer...
I recommend using the Tow-Rax Battery Box # 329-HM426 for your upgraded 6V Trojan batteries. This box has internal dimensions of 11-25/32" long, 8-27/64" wide, and 10-15/16" tall which should be more than enough space to fit one battery. You will have to use two boxes if you are using two batteries. view full answer...
The standard AGM 24 battery dimensions are 6 3/4" Width x 9 7/9" Height x 10 7/8" Length which is a very common size. AGM or lead acid Group 24 size batteries would be the same size. view full answer...
The Commercial Grade Battery Box for Dual 6V Batteries # 329-HM426 is a hard molded plastic so you could definitely cut a hole in the lid and run a hose from it to a vent like the Valterra RV Battery Box Vent with Cover - White Cover # A10-3300-05 ( # A10-3300BK-05) which can be mounted to the wall of your trailer.
These vents fit 1-3/4" battery box hoses, which you would need to source from your local hardware store, and can be secured with hose clamps. view full answer...
The vent ports of the Commercial Grade Battery Box # 329-HM426 are around the top of the box underneath the lid. See attached picture to see the cut outs along the top of the box. view full answer...
The NOCO Commercial Grade Battery Box for Dual 6 Volt batteries part # 329-HM426 would be a great choice for you as it was designed basically for your exact situation and I checked the standard dimensions for a GC2 battery like what you have and they are 10.75", 7.25", and 12.25" which this box would easily fit two of. view full answer...
I looked up the dimensions of the Optima Yellowtop deep cycle batteries and one would easily fit in the NOCO Commercial Grade Battery Box # 329-HM426 that you referenced with room to spare. The internal dimensions of this are 14-5/8" long x 10-1/2" wide x 11-1/2" tall and your battery is:
Width: 6.76 in
Length: 12.16 in
Height: 8.61 in view full answer...
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.
Product Experts Available Now!
Call 1-800-940-8924
3 MIN
Est. call wait time: 3 MIN
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.