Fronius International Fronius Verto 25.0 Plus
The Fronius Verto Plus series are three-phase hybrid inverters (grid-tie with energy storage support) designed for complex installations - with multiple strings, different roof orientations, and periodic shading. The key advantage is three independent MPPTs, enabling separate power-point tracking for different groups of modules, which genuinely improves yield when the roof is not uniform or parts of the panels operate under different sunlight conditions.
High European efficiency means the inverter is optimised for typical operating conditions in our climatic zone, thus minimising losses in daily, variable loads. Furthermore, extensive monitoring is available - a built-in web server and WiFi and Ethernet communication, making production monitoring and diagnostics convenient for both the user and the installer.
Verto Plus is compatible with energy storage systems and supports DC safety solutions, facilitating the design of small-scale and commercial installations. Compliance is proven by certifications such as CE, and the manufacturer's guarantee ensures predictable operation.
Ranking
Specifications
Pros and cons
Three separate MPP trackers in the 150-870 V DC range allow for independent string configurations with different orientations or different module technologies, without losses between groups. This is an advantage over two-MPPT competitors in the same class (e.g., Sungrow SH25/30T), where complex roofs require optimizers or additional wiring.
The Enhanced Power Harvest function allows for temporary over-generation of AC power up to 150% of the nominal output (e.g., in a 30 kW variant: up to 45 kW DC) - any excess power is immediately directed to the energy storage system. This mechanism effectively increases the annual energy yield during peak hours when PV production exceeds momentary consumption and the nominal AC output of the inverter.
In backup mode (with a battery), the Verto Plus provides up to 50 kVA of AC power, which is sufficient to handle the peak currents of large inductive loads (e.g., heat pumps, air conditioners, compressors). The Fronius GEN24 Plus, in the same range, offers only approximately 30 kVA of peak - Verto Plus is better suited for more demanding industrial installations.
The integrated Dynamic Peak Manager dynamically detects local minima in the U-I characteristic of each MPPT and optimizes the operating point without requiring external optimizers. This reduces partial shading losses without increasing the BOS installation costs - which is particularly important for roofs with complex geometries.
The IP66 protection rating allows for outdoor installation without the need for an additional enclosure. The integrated web server with access via WiFi and Ethernet simplifies both setup and remote diagnostics for installers and end-users - without the need to purchase separate communication gateways (unlike, for example, SMA Sunny Tripower in versions without Smart Energy).
The 30.0 kW variant costs approximately 16,130 PLN gross (approximately 537 PLN/kW), while a comparable Sungrow SH30T hybrid system has a price range of 8,000-10,000 PLN (approximately 267-333 PLN/kW). A price difference of approximately 60-100% per kW may be difficult to justify in standard prosumer installations without a sophisticated consumption profile.
The official list of compatible systems includes only Fronius Reserva, BYD HVM, and BYD HVS (up to 3 x 12.8 kWh = 38.4 kWh total). This excludes popular battery storage systems available on the Polish market, such as Pylontech, Huawei LUNA, EFT, and FoxESS - which limits design flexibility and price negotiation during battery selection.
The series starts at 15.0 kW, which excludes typical 5-10 kW prosumer installations. For smaller installations, Fronius recommends the GEN24 Plus series (3.0-10.0 kW), meaning that the Verto Plus is specifically designed for commercial installations or larger business-oriented prosumer setups.
Alternatives
About the Fronius Verto Plus series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.