The SOFAR 15-25KTLX-G3P series are three-phase grid-tie inverters designed for installations ranging from large residential to commercial and small industrial applications - where reliable operation under varying conditions and flexible PV string design are key. The key advantage is multi-point MPPT tracking, which facilitates high energy yields regardless of different panel orientations, unequal module selection, or partial shading - the inverter effectively harvests energy from each generator section. High European efficiency means the device maintains excellent performance even in typical, variable operating conditions, not just in an ideal laboratory setting, translating to real annual energy production. Standard features include remote software updates and enhanced communication and monitoring capabilities (e.g., WLAN/Bluetooth and RS485 - depending on configuration), enabling faster service and diagnostics. This is not a hybrid inverter, so it is not designed for direct integration with energy storage systems; it excels in situations where maximizing self-consumption in an on-grid system and reliable operation of DC and AC protection features is a priority.
Ranking
Specifications
Pros and cons
The official SOFAR 15~25KTLX-G3P datasheet (sofarsolar.com, February 2024) confirms a maximum efficiency of ≥98.6%, placing the series on par with the SMA STP 15-25 and Fronius Symo GEN24 Plus in this power class. For a 20 kW system, this translates to several tens of kWh of additional annual yield compared to inverters operating at ~97.5% efficiency.
The IP66 ingress protection rating - one step above the widely used IP65 - provides resistance to powerful water jets, allowing outdoor installation without an additional enclosure or canopy. The -30°C to +60°C operating temperature range eliminates the risk of frost damage in winter and thermal shutdown in summer under Polish climate conditions, with no need for supplementary active cooling.
The 160 V lower MPPT threshold enables operation with short strings (east-west orientations, partially shaded roof sections) without the risk of dropping out of the MPPT operating window. Manufacturer-confirmed compatibility with 182 mm (M10) and 210 mm (G12) wafer formats ensures full readiness to pair with today's highest-output modules (Jinko Tiger Neo, LONGi Hi-MO 6, Trina Vertex).
A maximum DC input voltage of 1100 V allows longer string designs and fewer parallel connections, reducing DC wiring BoS costs. The sustained 110% AC overload capability lowers the risk of disconnection during transient power peaks, while built-in Type II surge protection devices (SPD) on both the DC and AC sides are included as standard - not a paid option.
Sofar Solar provides a 12-year factory warranty for the European market (sofarsolarpoland.pl, sofarsolar.eu), while SMA and Fronius begin at 5 years with paid extension options. Additionally, Sofar appears on the PVBL 2025 Top 20 Global Solar Inverter Brands list with a Grade A accreditation, facilitating bankability for commercial projects with domestic lenders.
The G3P series lacks both DC- and AC-coupled interfaces for energy storage integration. Adding a battery at a later stage requires a full inverter replacement with a hybrid unit - such as Sofar's own HYD 5-20KTL-3PH series, SolarEdge E-WR3, or Fronius GEN24 Plus. Given the rapid growth of the ESS market in Poland in 2024-2025, this limitation may shorten the product's effective market lifecycle for investors planning a future system expansion.
Alternatives
About the SOFAR 15-25KTLX-G3P series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.