TAP Placement and Layout

This article covers the TAP placement requirements and layout guidelines. For basic information, refer to TAP Basics - What is a TAP? and Determine Number of TAPs and CCA Units.

TAP Placement Requirements      

With mesh, the TS4s automatically act as repeaters relaying messages when required. For the signal to make a hop to another TS4, the TS4s must not be more than 10m (33ft) apart.

If there is a gap between arrays of modules, make sure the distance is within the 10 meter limit.

The maximum range of a TAP, combined with multiple repeater hops, is a maximum of 115ft / 35m. If modules are located farther from the TAP, or if there are physical obstructions in the array (HVAC units, gables, parapets, drop-roofs, dormers, etc), you may be required to use additional TAPs. 

PV Module Arrangements Affecting Wireless Communication

Some PV module arrangements will affect the signal strength and/or communication between TAPs and TS4s. Here are some common module position arrangements, and the related concerns:

Excessive Gap Arrangement

Obstructions Reducing Signal Strength

(Even if the TAP and TS4 are less than the required 10 meters apart)

TAP Layout

Once you are ready to install a Tigo system, it's time to create a layout of the array(s) with the placement of the TAP(s). This is important, as a good placement will allow your modules to maintain solid communication for both data monitoring and Rapid Shutdown (RSD).

• Start with a drawing or plan of the system using the CAD tool of your choice. The drawing must show physical scale/dimensions and stringing. Make note of any obstacles which may obscure the wireless signals of the TAPs. 
  
  
• Using the TAP and Mesh guidelines, layout your TAPs across the system and identify how many CCAs and TAPs you will need.
  
  
• Once you have your TAPs and CCAs laid out, assign each string to an individual TAP and CCA.
  
  
• Assign each inverter to a single CCA (unless you are using central inverters). Do not split a string across more than one inverter or CCA.
  
  
• Add TAP locations to the middle of each array (for max coverage), and clearly define the areas of each TAP's coverage (color coded):

For an example of what your completed design might look like:  Sample TAP CCA Layout - Large Systems

For small systems with uncomplicated layouts, Tigo offers a TAP Placement Tool that can help you find the best placement for the TAPs. 

For additional assistance, contact our Sales Engineers: se@tigoenergy.com

Related Content

• TAP Basics - What is a TAP?
• Determine Number of TAPs and CCA Units