Growatt MOD 3000-9000TL3-HU series are three-phase hybrid (battery ready) inverters for on-grid installations, designed to operate as a classic grid-tie today and easily expand with a battery energy storage system tomorrow. The integrated backup function sets them apart - eliminating the need for an additional backup box, simplifying the design and reducing the number of components in the installation.
The dual MPPT helps on rooftops with various connections or partial shading by independently optimizing the performance of two PV strings - making it easier to configure different module orientations and maintain stable energy production. High European efficiency means better yields in real climatic and grid conditions in Poland, not just in the lab.
Standard features include extensive communication and monitoring options via the app and WiFi modules, as well as service interfaces (e.g., RS485/USB), making production monitoring and diagnostics convenient. Additional safety is supported by features such as Type II surge protection and AFCI. The series is CE-certified and comes with a 10-year warranty - making it an excellent choice for homes and small commercial properties.
Ranking
Specifications
Pros and cons
The integrated backup system (ATS) eliminates the need to purchase a separate backup box, which is required in comparable solutions (e.g., SMA Backup Box ~1000-1500 PLN). This simplifies the installation process and reduces the number of potential points of failure.
The declared European efficiency of 98.1% (maximum 98.6%) is equal to or slightly higher than that of SMA Sunny Tripower (~97.9%) and Fronius Symo (~97.9%), which, in the Polish climate (many hours with irradiance below STC), translates into a significantly higher annual yield.
AFCI arc-fault protection and SPD (surge protection device) Class II are included in the device's price. At this price point (~4000 PLN for a 3-phase model), most European manufacturers offer these protections as optional paid features or require separate modules.
Growatt secured the number 1 position as the leading global supplier of inverters for residential solar installations in 2024, according to Wood Mackenzie and S&P Global Commodity Insights. In October 2025, Growatt also achieved official Tier 1 PV Inverter Supplier status from S&P Global, confirming its availability of service, spare parts, and ongoing software development.
A three-phase model with backup functionality costs approximately 4000 PLN, while the SMA Sunny Tripower 5.0 costs around 5500 PLN, and the Fronius Symo 5.0-3-M costs approximately 6000 PLN - representing a difference of 35-50% despite similar efficiency and more comprehensive standard features (backup, AFCI).
Growatt does not appear on the BloombergNEF Tier 1 Bankable list (context: tier_1_bankable: false), which could be a barrier for projects requiring bank financing based on BNEF criteria. This should be distinguished from the Tier 1 status awarded by S&P Global (using a separate methodology).
The standard warranty is 10 years, while SMA offers an extension up to 20 years (through its Smart Connected program), and Fronius offers optional packages that extend protection for up to 20 years for an additional fee. For installations with a 25-year investment horizon, the lack of a paid extension option may be a significant limitation.
Alternatives
About the MOD 3000-9000TL3-HU series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.