PV Solar Module Compatibility
Tigo's TS4-series MLPEs (module-level power electronics) are a technology compatible with many of the available PV modules on the market. However, there are specific compatibility characteristics you want to check before purchase:
✅ Cable Length:
Verify for landscape orientation (especially for split j-box modules with short leads) and compare to the cable length specified on Tigo's datasheet. Currently, the outward or string-side PV Wire length for all Tigo TS4 products is 1.2 m / 3.93 ft.
✅ Matching Connectors:
The existing test standards for PV connectors (such as IEC 62852:2014 + A1:2020 and UL6703), were created for products of the same type (or type family) and designed by the same manufacturer. These standards always refer to the connection of socket and plug within a type family and not to the respective individual parts of a connector.
The NEC 2020 Requirements (690.33) mandate that all mating connectors must match in both type and manufacturer (unless stated as being mate-able by the original manufacturer). Tigo's TS4 product is assembled with Stäubli MC4 connectors.
Tigo strongly recommends using Stäubli manufactured MC4 connectors. Mating these connectors with any other manufactured products can result in a system inspection failure or damage to the unit (or PV Module).
"Cross-connections and cross-mating components are not recommended and may lead to severe, costly damage." - Staubli.com
Note: The MC4 and MC4-EVO-2 are both manufactured by Stäubli. The manufacturer states:
"They are of the same type (MC4) and compatible for connection."
All requirements for compatibility are met when mating an MC4 with these plug connectors.
✅ Electrical Characteristics:
Verify that the max power, voltage, and current do not exceed the maximum specifications of the TS4. The most important module specifications are:
- Bifacial Gain (de-rating voltage for Bifacial Modules)
- Temperature Coefficient (de-rating voltage for cold temperatures)
This information can be found on the product datasheets in the Tigo Downloads Center
✅ Electrical Compatibility with TS4s:
Some PV modules can exceed the TS4 maximum voltage in cold weather conditions. For this reason, the module's max Voc should be adjusted accordingly. This process is informally referred to as Temperature Correction, and it should yield a result less than (or equal to) the max voltage listed on the TS4 data sheet.
For more information:
How to Calculate a PV Module's Voltage (Vmp) in Different Ambient Temperatures
Bifacial modules should also be de-rated in voltage. Tigo recommends using the maximum bifacial boost figures. If the datasheet does not clearly show max current (with a bifacial boost), a 20% boost should be factored in.
After completing the temperature correction, also verify if the module Isc has not exceeded the TS4's maximum Isc (listed in our datasheets).
✅ Frame fit:
The PV Module frame size must be compared to the TS4 dimensions.
Ensure a minimum distance of 0.5 inches (13mm) between the TS4 and the module back sheet for adequate airflow around the TS4.
This will ensure that the unit can be properly mounted onto the frame. Generally, the TS4 is mounted so that the tigo leaf is facing you as you mount the TS4 to the module frame. If the TS4 is too close, then remove the TS4, rotate it 180 degrees so that the leaf is facing the back sheet of the module, and mount it to the frame. If this still does not provide adequate clearance, or if you are using frameless modules, remove the TS4 silver mounting clips and screw-mount directly to the racking.
Leaf Facing Away from Module
Clearance is greater than 0.5 inches but if it wasn't, remove, flip and remount
Leaf Facing Towards Module Back Sheet
Notice how there is significantly more clearance between module and TS4
For more info: How do I remove the module clips from the TS4-A?
If you have any doubts, please send the datasheet for the PV-Module to email@example.com, and our engineers will confirm its compatibility with Tigo products.