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Tigo's TS4-series MLPEs (module-level power electronics) are compatible with many PV modules on the market. However, you must check specific compatibility requirements before purchasing to ensure an efficient, worry-free system. |
Mechanical Checks
✅ Cable Length: Verify for landscape orientation (especially for split-j-box modules with short leads) by comparing the module cable length to the TS4 cable length specified in the applicable datasheet.
The TS4 longer output cables (green in the image below) connect to one another and are available in different lengths. Consult the applicable TS4 datasheet found on our Downloads page.
✅ Matching Connectors:
The United States National Electric Code 2020 Requirements (690.33) mandate that all mating connectors must match in both type and manufacturer (unless stated as compatible with the original manufacturer). The TS4 uses MC4 connectors.
Tigo strongly recommends using compatible MC4 connectors as directed by local Codes, regulations, and authorities.
✅ 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 faces you as you mount the TS4 to the module frame. If the TS4 is too close, remove it, rotate it 180 degrees so that the leaf faces the module's back sheet, and mount it to the frame.
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Leaf Facing Away from Module If clearance is less than 0.5 inches, remove the TS4, flip, and remount (right image) |
Leaf Facing Towards Module Back Sheet Notice how there is significantly more clearance between the backface of the module and TS4. |
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.
From the TS4 Quick Start Guide:
For more info: How do I remove the module clips from the TS4-A?
Electrical Checks
✅ Electrical Characteristics:
Take a moment to verify that the maximum power, voltage, and current do not exceed the TS4's maximum specifications. The most important module specifications are:
- Imp - Current at Max Power
- Isc - Current at Short Circuit
- Vmp - Voltage at Max Power
- Voc - Voltage at Open Circuit
- Bifacial Gain (20% current gains for Bifacial Modules)
- Temperature Coefficient (de-rating voltage for cold temperatures)
TS4 product datasheets are in the Tigo Downloads Center
✅ Electrical Compatibility with TS4s:
Temperature Correction of Voltage
Some PV modules can exceed the TS4 maximum voltage in cold weather conditions. The module's max Voc should be adjusted accordingly. This process is called temperature correction, and the final calculation must yield a result less than the maximum voltage listed on the TS4 data sheet.
For more information:
How to Calculate a PV Module's Voltage (Vmp) in Different Ambient Temperatures
Current Correction of Irradiance
At higher altitudes, irradiance exceeds the STC value of 1000 watts per square meter. The TS4s have varying ISc limits that must be accounted for. Otherwise, a consistent overcurrent scenario can irreparably damage the units.
Also, Tigo recommends using the maximum bifacial boost figures for bifacial modules. If the datasheet does not clearly show the max current (with a bifacial boost), a 20% boost should be applied.
Consult this Help Center article to verify current correction for high irradiance:
How to Calculate PV Module Current Correction for High Irradiance Locations
Questions?
If you need further assistance, please use the Tigo Green Glove message form.
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