NOCO HM485 Commercial Grade Battery Box – Dual 8D
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Dual 8D Commercial Battery Enclosure for Marine, RV & Commercial Use
The NOCO HM485 is a rotationally molded, commercial-grade battery box designed to house two Group 8D batteries side by side. Built from impact-resistant, UV-stabilized polyethylene, it stands up to saltwater, fuel spills, extreme cold, and constant vibration — making it the right choice for high-demand twin-battery installations on offshore vessels, large RVs, and commercial equipment.
Key Features
- Accommodates two Group 8D batteries in a single, secure enclosure
- Four-corner fastening system with captive lid for a rattle-free, secure fit
- Large cable entry holes accommodate wire up to 4/0 AWG for high-current applications
- Full-flow ventilation channels safely release battery off-gassing
- Oversized battery acid reservoir for added safety
- Rotationally molded construction resists UV, oil, gas, and low-temperature cracking
- Meets USCG Code of Federal Regulations 183.420
- Meets ABYC Standard E-10.7
Parts Desk Insights
Best suited for twin-engine offshore boats, large commercial fishing vessels, and heavy-duty RV house banks that run dual 8D batteries. The dual-cavity design keeps both batteries secured in a single code-compliant enclosure, simplifying installation and reducing the footprint compared to two separate boxes. For single 8D applications, see the NOCO HM484 Single 8D Battery Box. For single 4D installations, consider the NOCO HM408 Single 4D Battery Box. For dual 6V golf-cart style batteries, the NOCO HM426 Dual 6V Battery Box is the correct fit. Secure your installation with the NOCO BS48R 48" Battery Box Strap Kit.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.