What is selective deployment and what are the guidelines?
Selective deployment allows you to use TS4-O optimizers only where needed, instead of on every module in the array.
TS4-O optimizers can be applied only to PV modules in partially shaded areas or on a string of PV modules that have a different orientation.
With selective deployment, you can use the TS4-Os in the same system with the other TS4 models: TS4-S and TS4-M. This flexibility allows you to deploy only the features you need, where you need them, subsequently reducing your cost and increasing ROI. Selective deployment is a feature unique to the Tigo TS4 family of MLPE. For product information visit TS4 Product Information.
Example - Portion of the array is shaded and you require rapid shutdown.
In this selective deployment scenario, you can use the TS4-S on panels that are not shaded and use the TS4-O on the shaded panels.
Note that with rapid shutdown and module level monitoring, Tigo's TAP and CCA are also required for communication.
For best results for long-term array health, please follow these guidelines.
Rule: Selective deployment should only be used when a string has its own MPPT and is actively independent of any other string. Selective deployment of optimization on parallel strings is NOT supported.
The following examples reinforce this rule.
When using a single string per MPPT, optimization can be selectively deployed only on the shaded modules (using TS4-O). For monitoring and safety/rapid shutdown functionality, TS4-S can be deployed on all unshaded modules.
Dual MPPT inverters can offer selective deployment of optimization on each MPPT.
Selective deployment of optimization on parallel strings within a single MPPT is NOT supported. It is either all or nothing.
With parallel strings on the same MPPT input, 100% deployment of optimization (TS4-O) is recommended.