Home  >  Solar Panel Wiring and Installation Equipment  > 
MC4 Interconnect Cables and Adaptors for Solar Electric Panels

Multicontact (MC4) Solar Panel Interconnect Cables & Adaptors

MC4 Interconnect Cables and Adaptors for Solar Electric Panels

MC4 Cables for Solar Panel Interconnections

MC4 cables are used on nearly all new panels in the 100 watt+ range except for those specifically made for off-grid/RV/Marine applications, which still use the standard junction box, such as the Kyocera KC135.

The latest NEC code requires the MC4 type latching connectors, as shown in the picture. All new solar panels use the MC4 connectors. There are a few of the older (2007-2008 manufactured) panels around that use the MC3 (non latching) type cables. We no longer stock the now obsolete MC3 items.

There are a few panels that use the Tyco Solarlok type connectors and cables, such as Day4. Special order only, 3-5 days.

All of our MC4 cables are made with #10 AWG stranded UL/NEC approved RHW-2/RHH (USE-2) sunlight resistant wire.

If you are using a solar panel with MC type connectors on them for RV, marine, or other application where you need to tie into a charge controller, junction box, or array combiner, just buy ONE extender cable that is twice the total length needed and cut it in half. ** Do NOT cut the connector off the end of the solar panel cable, as that will void the manufacturers warranty.

Polarity: We cannot find any "official" notes on polarity, but all the modules we have seen use the tapered looking end as the Positive (+) and the other as the Negative on panels that come pre-wired with MC connectors.

8 Foot MC4 Extender Cable Male/Female
Price: $12.50
15 Foot MC4 Extender Cable Male/Female
Price: $17.90
30 Foot MC4 Solarline 2, Extender Cable Male/Female
Price: $31.50
50 Foot MC4 Solarline 2, Extender Cable Male/Female
Price: $45.75
100 Foot MC4 Solarline 2 Extender Cable Male/Female
Price: $85.55
Multibranch MC4 Connectors, Latching
Price: $10.07
MC Cable Clips
Price: $0.82
Disconnect Tool for MC4 Connectors
Price: $4.50
What are MC Connectors and Cables?
How to use MC4 Connectors and Extension Cables

We accept all major credit cards, PayPal and eCheck (via PayPal). We ship to all states and Canadian provinces, and to about 40 other countries.

Our Fall and Winter office hours are from 8 AM to 4 PM, Arizona Time, Mon-Fri. We are closed for major holidays. If you are in the Flagstaff area, please stop by our store and visit - map link: Get Map to Store

Flagstaff, AZ Local Time

Shop By Category