Marine Busbar & Terminal Blocks | Custom Busbar Manufacturer
Reliable power distribution for marine, RV, and battery systems.
High Current Busbars for Reliable Power Distribution
Our marine-grade busbars are designed for high-current applications including battery systems, RV power distribution, and marine electrical installations.
- Tin-plated copper for corrosion resistance
- High current capacity (100A–600A+)
- Custom terminal configurations (M6 / M8 / M10)
- OEM & ODM busbar solutions
Need help choosing the right busbar? Contact our engineering team today.
Our Busbar Products
Heavy Duty Bus Bar Boxes
Heavy Duty Bus Bar Boxes – Safe, Reliable, Customizable
Looking for a reliable busbar solution for your system?
Our heavy-duty bus bar boxes are built with insulated covers and tin-plated copper conductors, ensuring safe and efficient power distribution even in harsh marine environments.
👉 Why choose us:
- High current support up to 450A+
- Corrosion-resistant materials
- Custom terminal configurations
👉 Need a custom design? Contact us today for a fast quote.
High-Amp Bus Bar
High-Amp Bus Bars for Marine, Solar & RV Systems (150A–300A-450A)
Our high-current bus bars are built with tin-plated copper for superior conductivity and corrosion resistance in harsh environments.
Designed with insulated covers, they provide safe and stable power distribution for battery systems and DC applications.
✔ High current capacity up to 450A
✔ Marine-grade corrosion protection
✔ Reliable performance under continuous load
✔ Custom busbar solutions available
Contact us today for a custom busbar solution.
Compact Busbars with Covers
Covered Busbar with Insulated Housing (130A–150A)
Designed for safe and stable power distribution, this compact busbar features a multi-material insulated structure to ensure durability, electrical safety, and long-term performance in demanding environments.
- Continuous Rating: 130A AC / 150A DC
- Max Voltage: 300V AC / 48V DC
- Terminal Stud: M6 Stainless Steel (×2)
- Terminal Screw: M4 Stainless Steel
- Mounting Type: Fixed base installation
Need custom busbar configurations?
We support OEM/ODM designs including different current ratings, terminal layouts, and materials.
Stud Junction Blocks
Stud Junction Blocks – Flexible & Reliable Power Connections
Need a dependable solution for DC power distribution?
Our stud junction blocks offer secure and flexible connection points for 12V–48V systems, making them ideal for marine, RV, and battery setups.
Key benefits:
- Multiple stud sizes (M6 / M8 / M10)
- Single or dual stud designs
- Easy installation and wiring flexibility
Looking for custom specifications? Contact us today.
Applications
Factory-direct copper & tinned bus bars trusted for marine, solar, RV, and industrial systems — with OEM/ODM customization, small MOQ, and fast global delivery.
- Marine Electrical Systems
Tinned bus bars for bilge pumps, inverters, and DC distribution. - Solar Energy Systems Bus bars for battery banks, combiner boxes, and controllers.
- RV Power Distribution
Compact power blocks for lighting, fridges, and inverter loads. - Battery Banks
Heavy-duty bus bar boxes for trucks, forklifts, and backup power.
Why Choose Our Busbars?
Engineered for Stability. Built for the Extremes.
Superior Conductivity & Durability Crafted with high-purity brass conductive bars and marine-grade stainless steel hardware, our busbars ensure maximum power efficiency and zero corrosion, even in high-salt offshore environments.
Uncompromising Safety Standards Featuring a flame-retardant Nylon (PA) base and a multi-material insulated structure, our design significantly minimizes short-circuit risks. The transparent PC cover adds an extra layer of physical protection and ease of inspection.
High-Current Reliability Rigorous quality control ensures stable performance under continuous loads (up to 450A DC / 130A AC). Whether it’s extreme heat or high-vibration settings, our busbars maintain a rock-solid electrical connection.
Versatile & Space-Saving Design The compact footprint and hybrid M4+M6 terminal layout offer ultimate flexibility for tight installations in RVs, yachts, and industrial DC auxiliary systems.
Proven OEM/ODM Expertise Leveraging over a decade of experience in marine and automotive electrical architecture, we provide tailored customization to meet your specific project requirements.
Selection Guide: How to Choose the Right Busbar
Ensuring Safety, Efficiency, and Longevity in Your Electrical System.
Selecting a busbar involves more than just matching bolt sizes. Follow our comprehensive guide to build a reliable power distribution network.
1. Calculate Load & Environmental Derating
Always choose a busbar with a continuous rating 20-30% higher than your maximum load.
Pro Tip: If installing in high-temperature areas like engine compartments, we recommend derating the current capacity by an additional 10-15% to account for ambient heat.
Our Range: From 150A for auxiliary circuits to 450A for heavy-duty power banks.
2. Match Terminal Geometry to Your Wiring
The stud size must match your cable lugs to ensure a low-resistance connection.
Hybrid Design Advantage: If your system has both heavy power cables and smaller signal wires, our M4 + M6 mixed terminal layout is the ideal space-saving solution.
The “Stacking” Rule: For maximum safety, avoid stacking more than 4 ring terminals on a single stud. Always place the largest, highest-current cable at the bottom (closest to the bar) to minimize heat buildup.
3. Material Selection for Harsh Environments
Don’t compromise on materials if your application involves moisture or salt.
Marine & Solar: Choose our Tin-Plated Brass or Copper bars with Stainless Steel hardware. This combination offers the ultimate defense against corrosion and oxidation.
General Use: High-conductivity copper is excellent for dry, stable environments where cost-efficiency is a priority.
4. Insulation & Short-Circuit Protection
In confined spaces, physical protection is non-negotiable.
Safety First: Opt for busbars with a reinforced Polycarbonate (PC) cover and a Flame-Retardant Nylon (PA) base. This structure provides essential insulation in high-vibration or tightly packed RV and boat cabinets.
Visual Inspection: Clear covers allow for quick maintenance checks without exposing live circuits.
5. Critical Installation Factors (The Often Overlooked)
Tightening Torque: Proper torque is vital. Over-tightening can strip threads, while under-tightening creates high-resistance “hot spots.” (Please refer to our technical datasheet for specific M6/M8 torque values).
Vibration Resistance: For marine or off-road use, ensure your busbar is mounted on a fixed, stable base and use locking washers to prevent hardware from loosening over time.
| Feature | Keto Technology Standard |
| Current Ratings | 150A / 300A / 450A DC |
| Max Voltage | 48V DC / 300V AC |
| Base Material | Glass Fiber Reinforced Nylon (UL 94V-0) |
| Hardware | 304/ Stainless Steel |
| Conductive Bar | High-Purity Brass or Tin-Plated Copper |
Frequently Asked Questions
We’ve compiled the most common questions about our bus bars and terminal studs. For any additional inquiries, our team is here to support you with technical details or custom requests.
Can these busbars be used in a 48V system?
Absolutely. Our busbars are rated for up to 48V DC and 300V AC. The insulation materials and spacing are engineered to handle the higher potential of 48V lithium battery banks (LiFePO4) and provide a significant safety margin against transient voltage spikes
Brass vs. Copper: Which material should I choose?
It depends on your environment and conductivity needs:
Tin-Plated Brass: Best for Marine & Coastal environments. It offers the highest resistance to salt-air corrosion while maintaining excellent conductivity for medium-current applications.
Tin-Plated Copper: Best for High-Current & Solar storage. Copper provides maximum conductivity for high-amperage draws (300A-600A) with minimal heat buildup.
All our busbars feature tin-plating to prevent oxidation and ensure long-term stability.
Why do I need a busbar with a cover?
Safety and reliability. An insulated Polycarbonate (PC) cover prevents accidental short circuits caused by dropped tools or loose metal parts. It is especially critical in confined, high-vibration spaces like RV battery compartments or yacht engine rooms.
What is the maximum number of terminals I can connect to one stud?
For optimal safety and low resistance, we recommend a maximum of 4 ring terminals per stud. If you have more connections, we suggest using our hybrid M4+M6 design, which allows you to distribute smaller auxiliary loads across multiple screw points while keeping the main power studs clear.
Are your busbars "Marine-Grade"?
Yes. To be truly “Marine-Grade,” a busbar must resist the corrosive effects of salt spray. We use 304 Stainless Steel hardware (studs, nuts, and washers) and Flame-Retardant Nylon (PA66) bases, ensuring they won’t crack or corrode in harsh offshore conditions.
How do I determine the right Ampere (A) rating for my busbar?
Your busbar should be rated at 1.25x to 1.5x the maximum continuous current of your system. For example, if your total continuous load is 100A, a 150A rated busbar is the minimum requirement to ensure cool and safe operation.
Can I mix AC and DC circuits on the same busbar?
No. For safety and to comply with electrical standards (like ABYC or RVIA), AC and DC systems must be kept physically separate. Using a dedicated busbar for each system prevents catastrophic cross-contamination of voltages.
Do you provide OEM/ODM services for custom configurations?
Yes, we specialize in B2B solutions. Whether you need custom laser-etched branding, specific stud counts (e.g., all M10 or custom M4/M6 ratios), or bulk packaging for retail, our engineering team can provide a tailored solution. Typical lead time for custom batches is within 20 days.
Request a Custom Busbar Solution
Looking for a reliable busbar manufacturer? We provide OEM/ODM solutions for global clients.
