Growatt MOD TL3-X is a three-phase grid-connected inverter (on-grid) designed for efficient operation in home and small commercial installations, where reliability, safety, and easy operation are crucial. Its key feature is equipped with two independent MPPT trackers - they facilitate optimization of energy yields when panels are spread across two roof sections, have different orientations, or shade periodically occurs. In practice, this translates to more predictable energy production under Polish conditions.
The MOD TL3-X offers high European efficiency, meaning truly good efficiency under typical installation operating conditions, not just in laboratory settings. It also benefits from a comprehensive safety package - including AC/DC surge protection and an AFCI function limiting the risk associated with electric arcs.
For monitoring, you can use data loggers and the ShinePhone app, and communication can operate via WiFi or Ethernet (depending on configuration). This series comes with certification documents, and the standard warranty covers a long period with the possibility of extension.
Ranking
Specifications
Pros and cons
The 8 kW model achieves European-level (weighted efficiency) performance of approximately 97.9%, with a maximum efficiency of 98.6%. This is a competitive value compared to the median performance of 15 kW three-phase inverters, which ranges around 97.5-98.0%, resulting in a realistically higher annual yield under typical, variable solar irradiance conditions in Poland.
Each tracker supports a voltage range of 140-1000 V and a current of up to 13 A, allowing for independent optimization of two strings with different orientations or shading exposure. In practice, this eliminates the need for external optimizers in typical two-axis installations, reducing BOM costs.
The IP66 sealing class provides complete protection against dust and strong water jets, while the lower temperature limit of -25°C covers extreme Polish winters without the risk of frost damage. This allows for outdoor mounting without the need for additional enclosures in most locations across the country.
A weight of under 15 kg for the 10 kW model allows for single-person installation without the need for a lift, which reduces installation time and, in practice, lowers labor costs. For comparison, the SMA Sunny Tripower 10.0 weighs approximately 17 kg, while the Fronius Symo Gen24 10.0 weighs approximately 21.9 kg.
The wide range of power options within a single series (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15 kW) unifies documentation, firmware, and spare parts. For installers managing multiple projects, this means lower storage costs for replacement parts and a single monitoring ecosystem (ShinePhone / Shine Web).
According to the manufacturer's data, Growatt does not appear on the official BNEF Tier 1 Power Inverter Manufacturers list (available to BNEF clients), which includes companies such as GoodWe, SMA, and Huawei, as confirmed in Q2 2025. In projects requiring bank financing or financial insurance, investors may need to conduct additional due diligence or pay an additional premium.
In the base MOD TL3-X series, arc fault detection (AFC) is available as an optional feature, not as standard equipment. Fronius Symo Gen24 and SMA Sunny Tripower Smart Energy offer AFC as standard from 2022 onwards, which could be a key selling point for installers in facilities requiring a higher level of fire protection.
Alternatives
About the MOD TL3-X series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.