Copper Battery Cable Lugs | 6221 Series | Conversions Tech

6221 Series Copper Battery Cable Lugs

The Conversions Tech 6221 series is our flagship copper compression lug line — designed specifically for battery cable, inverter, solar, and marine applications where bare copper contact is critical for maximum conductivity.

Available in both non-tinned (NP) for direct copper-to-copper connections and tinned (TP) for corrosion resistance in marine and outdoor environments. Every stud size (1/4", 5/16", 3/8", 1/2") in AWG sizes 1 through 4/0.

$2.48 per lug — flat pricing across all sizes

Compare to Burndy YA at $8-15+ per lug, Panduit LCAX at $10+, or T&B Color-Keyed at $7+. Same seamless tubular copper barrel, same UL 486A/B listing, same crimp tools. View full cross-reference.

Common applications

• Battery bank interconnects (lead-acid, lithium, AGM)
• Solar inverter DC connections
• Marine starting and house battery cables
• RV and off-grid power systems
• UPS and backup power terminations
• Welding cable terminations

Pro Pricing for marine, solar, and electrical contractors.

Vehicle sizing guide: Find the right battery cable lug for your car, truck, RV, boat, golf cart, or EV. Battery cable lug sizing chart