Building wire (typically THHN or THWN-2) is what you use for the conduit runs inside your home or between the inverter and main panel. It's not rated for direct sun exposure or direct burial – that's what PV wire and USE-2 are for.

What we carry:

• UL listed THHN and THWN-2
• Common gauges for solar: 10 AWG, 8 AWG, 6 AWG, 4 AWG
• Standard colors: black, red, white, green

Typical uses:

• Conduit from combiner box to charge controller
• Inverter AC output to main panel or subpanel
• Wire runs inside buildings and garages

Need bulk quantities or a size not listed here? Call us. We have access to larger spools and a wider range of gauges and colors.

Call us at 1-800-766-7644 – we'll quote you by the foot or by the reel.

Locally owned and operated in Colorado since 2002.