Direct: (503) 987-4002
Main: (503) 987-4000


Expand your lithium battery bank with confidence using the Expion360 400A Extended Bus Bar Set. Designed specifically for Expion360 Group 24 and Group 27 lithium batteries, these precision-fit bus bars allow you to parallel connect batteries for increased amp-hour capacity and improved system efficiency.
Engineered from high-conductivity aluminum and rated at 400 amps, these extended bus bars provide a secure, low-resistance electrical connection across compatible 60Ah, 80Ah, 95Ah, 100Ah, and 120Ah Expion360 batteries. By reducing resistance at the terminal interface, they help maximize power transfer and system performance.
These extended bus bars are ideal for connecting two dual battery tray systems to create a quad-battery configuration. They are also required when installing the Expion360 external heating system alongside single battery trays, ensuring proper spacing between batteries while maintaining structural integrity.
Whether you’re building a high-capacity RV battery bank, overland power system, or off-grid installation, the Expion360 Extended Bus Bar Set provides a clean and professional solution for expanding your lithium setup.
We ship nationwide and internationally. Most in-stock items leave our shop within 1–3 business days. Made-to-order and oversized parts may require additional lead time; any special timing will be noted on the product page.
If an order is placed outside of our normal business hours (Monday–Friday), we will process it as soon as possible once our team is back in the shop during regular operating hours. Weekend orders will be handled the next business day.
We want you stoked on your gear. Eligible items may be returned within 30 days of delivery for a refund or exchange.
Many products include a manufacturer warranty. We’re happy to help facilitate claims—reach out with your order number, photos, and a description of the issue.
Questions about shipping or returns? Get in touch—our team is here to help you get trail-ready.
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