How 1P T-Cables can Simplify and add Flexibility to your Microinverter Installation
The Pros of Using 1P T-Cables
Easy to install; no need to strip wires
Positive lock feedback
One-to-one ratio simplifies ordering process and inventory management
No need for joiners and end caps
Reduces time on the roof
Connections easy to verify, simplifying operation and maintenance
Trunk cable is usually sold in reels. This is okay if you only install microinverters and can use the remaining drops on other projects; otherwise, you end up with leftover trunk cable.
More challenging PV systems may need joiners and end caps that can take a fair amount of time to install, reducing the overall profitability of the installation.
There is a simpler, less wasteful and less time consuming option: 1P T-cable, a single element trunk cable. Installing a system with the 1P T-cable is very simple. One connector connects to the microinverter AC connector in the same fashion as a normal trunk cable. The other connectors, one male and one female, connect in series with other 1P T-cables to form a PV branch circuit. The end of the branch (not connected to the AC interconnect point) is sealed with a simple cover that requires no wiring or complicated assembly; it just snaps in place. The grid connection can be made using a transition cable or by cutting off the last 1P T-cable connector and “transitioning” to standard THHN/THWN via a junction box and conduit.