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NOCO

NOCO BT31S Group 31 Heavy-Duty Battery Tray for Marine, RV, Camper and Trailer Batteries

  • Based on 2,120 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Aug 23
Order within 9 hours and 27 minutes
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Features

  • A rugged battery tray for group 31 batteries, including marine, RV, camper, and trailer batteries.
  • Features a heavy-duty 42-inch hold-down strap with nylon resistant webbing that withstands a tensile load of over 120 kilograms of force.
  • Impact-resistant down to minus 20 degrees Fahrenheit, withstands acid, gas, oil and other contaminants, and immune to UV exposure.
  • Keeps your battery securely mounted and limits battery movement during transportation and operation.
  • Meets United States Coast Guard (USCG) Code of Federal Regulations 183.420, American Boat and Yacht Council (ABYC) E-10.7 specifications, and frustration-free packaging.

Description

The BT31S Battery Tray is one of the most durable and rugged battery trays for marine, RV, camper, and trailer batteries. Designed for use with a single group 31 battery. Include a 42-inch battery hold-down strap made for a water- resistant nylon material and withstands tensile loads of over 120 kilograms. Not only are these battery trays designed for abuse, but they also impact resistance down to minus 20 degrees Fahrenheit, withstand acid, gas, oil, and other contaminants, and immune to UV exposure. Meets United States Coast Guard (USCG) Code of Federal Regulations 183.420 and American Boat and Yacht Council (ABYC) E-10.7 specifications. Other commonly used search terms: battery tray,marine battery tray,boat battery tray,rv battery tray,battery tray kit,batteries tray,small battery tray,battery storage tray,trailer battery tray,battery hold down tray,battery trays,batterie tray,battery tray marine,marine battery trays,battery mounting tray,battery tray with strap,battery holder tray,deep cycle battery tray,marine battery hold down tray,battery box tray,battery trays for boats,12v battery tray,travel trailer battery tray,plastic battery tray,battery tray rv,noco battery tray,battery trays marine,camper battery tray,battery tray hold down,battery tray for boat,group 31 battery tray, 31 battery tray,battery tray 31, battery tray group 31

Brand: NOCO


Vehicle Service Type: RV


Size: One Size


Voltage: 12 Volts


Item Weight: 0.59 Pounds


Number Of Cells: 6


Terminal: Marine Terminal


Unit Count: 1.0 Count


OEM Part Number: BT31


Automotive Fit Type: Universal Fit


Compatible with Vehicle Type: RV


Voltage: 12 Volts


Number Of Cells: 6


Terminal: Marine Terminal


Automotive Fit Type: Universal Fit


Size: One Size


Item Weight: 0.59 Pounds


Brand Name: NOCO


Manufacturer Part Number: BT31S


OEM Equivalent Part Number: BT31


Model Number: BT31S


Manufacturer: NOCO


UPC: 046221130508


Global Trade Identification Number: 08


Item Type Name: NOCO BT31S Group 31 Heavy-Duty Battery Tray For Marine, RV, Camper And Trailer Batteries


Manufacturer Warranty Description: 1-Year Limited


Included Components: 42-Inch Battery Trap, Group 31 Battery Tray


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Group 31 (Battery Size) - bottom tray w/strap
Size: One Size
Battery sizes can be complicated, I didn't even know what group 31 means but I found out that it is the size of our RV's cab battery. I didn't like where the battery sits natively so I purchased the plastic bottom and strap to better secure it's position. Voila`, this was a terrific solution that fit my needs. I am thrilled with the purchase and feel it was a great value overall. The build quality, durabilty, and expected life of the components is solid and unpredictable unless damaged. The fit and ease of installation were the final part of satisfaction making this a great deal and easy to recommend to others. ... show more
Reviewed in the United States on February 4, 2025 by DIY Guy
    • Love lighter weight, good aH time
Size: One Size
Combined with good aH time and likely much longer life, the lighter battery is easier for an aged man to handle. Hardest job was replacing smaller base box with a larger one. Battery is great and worth the higher price.
Reviewed in the United States on August 15, 2025 by Ronh
    • Wow just wow the best battery box ever
Size: One Size
Review Image by ed
Review Image by ed
Review Image by ed
Review Image by ed
Review Image by ed
This is the strongest, well thought out battery box I have ever seen and with all the baots I have owned and do own I have seen many. The strap is nice and feels real nice and the clip is great, love the logo on the strap and the 4 end mounting points are so strong you don't need centers because the way its designed, less holes in a boat the better. I purchase the group 31 for my group 29 battery for my new trolling motor on my 17 carolina skiff. I also purchased the group 27 for my 2020 enclosed 22 ft car trailer that I run a small TV, led lite strip with outlets and 3.1 phone charger ports with an inverter. I will be upgrading my inverter and be buying 3 more group 27 battery trays for the trailer so i can run a microwave and mini fridge when taking the quads out or traveling.. I will also order another 2 for my caolina skiff,s 2 rear batteries. I purchased there marine onboard genius 5x2 for the boats rear batteries and upfront for the trolling motor there was a previous installed guest charger. My 2020 2500 ram diesel has a marine genius pro 10x1 for the fual batteries in parellel and keeps them evenly topped off at 13.18 volts in maintainer mode. Liked the onboard chargers so much I also purchased the Geniuse 10 amp portable charger and the very nice carrying case along with a pack of 20 toy battery quick connects to permanent install the quick plug so I can hook up the 10 amp to any of them and charge each one every month. I'm considering buying the 1 amp maintainer for all my toys and ride on mower. I can't say enough about the NOKO brand and these battery boxes honestly I wasn't expecting much they were cheaper then any others on Amazon but when it arrived I was extremely impressed. Will be buying more and NOKO customer for life fpr all my battery needs!!! No I'm not a sponsor but!!!!! If NOKO wants to sponsor me and my boat so I can travel around the United States and win fishing tournaments and show off NOKO products please do so and contact me!! ... show more
Reviewed in the United States on April 20, 2022 by ed
    • Works great when combined with adjustable hold down.
Size: One Size
This product worked great in conjunction with a hold-down (Uriah Products UV002500 Adjustable, Universal Crossbar, Battery Hold Down) to secure a deep cycle, Group 31 marine battery in my boat. The strap that comes with it works fine, but I had an issue with battery acid rotting a strap, so opted for replacing the strap with a tie-down purchased separately. ... show more
Reviewed in the United States on July 7, 2021 by JeffM
    • Battery tray
Size: One Size
Got these for additional batteries on our boat. A year later still going strong!
Reviewed in the United States on June 30, 2026 by Jesse
    • Good group31 battery tray
Size: One Size
Fits group31 lithium battery like a glove. Tie down strap is good, easy enough to get under when the tray is screwed down.
Reviewed in the United States on March 28, 2026 by Gabriel Valencia
    • Recheck the size of battery before you order
Size: One Size
It is of high quality and very rugged. Unfortunately the battery I wanted to use this tray for did not fit for me. No fault of the tray.
Reviewed in the United States on May 22, 2025 by elder
    • Research before you buy
Size: One Size
This tray requires that you have a supporting structure upon which to put the tray. It is not a good fit, for instance, at the trailer tongue area.
Reviewed in the United States on January 8, 2026 by Kenneth K. Kalish

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