The SOFAR 7KTLM-G3 series are grid-tie inverters for photovoltaic installations where stable operation with the grid and maximized yields under diverse rooftop conditions are key. Their key feature is three independent MPPTs - enabling the division of strings into different panels, handling partial shading effectively, and allowing flexible system design without significant compromises.
Users benefit from high European efficiency, meaning excellent performance under typical operating conditions in Poland - translating to more energy generated annually, not just during sunny midday hours. A valuable feature is also smart I-V curve scanning, supporting diagnostics and faster detection of module issues.
Monitoring is convenient thanks to communication (including WiFi, RS485, and often optional Ethernet) and viewing within the app. The inverter has a typical IP65 enclosure for this class, and compliance with common connection and safety standards facilitates approvals. This makes it a good choice for larger residential installations and small commercial projects.
Ranking
Specifications
Pros and cons
Having 3 MPPT trackers in a 7 kW single-phase inverter is uncommon in this class - most competitors (e.g., Fronius Primo, SMA Sunny Boy) offer only 2 MPPTs. This allows the system to be split across 3 independent roof sections with different azimuths and tilt angles without energy yield compromises.
The datasheet-confirmed European efficiency (weighted according to Central European irradiance distribution) is 97.3%, with a peak efficiency of 98.1%. This places the inverter at the top of its segment and translates into measurably higher annual energy yields in Polish climatic conditions compared to inverters achieving 96.5-96.8% EU efficiency.
The integrated I-V curve scanning function enables remote diagnostics of PV string health without additional measurement equipment. It accelerates detection of issues such as shading losses, module degradation, and loose connectors, thereby reducing system operating and maintenance costs.
Sofar Solar provides a standard 10-year factory warranty for the European market (per sofarsolar.eu terms), with an extension option up to 25 years. Vendors such as Delta or GoodWe frequently offer only 5-7 years as standard, making this a significant after-sales advantage.
Sofar Solar has been accredited as a Grade A inverter manufacturer in the Wood Mackenzie H1 2025 report, confirming compliance with rigorous ESG criteria, R&D investment levels, and financial stability. Grade A status is material for the bankability of commercial projects and for insurers.
MPPT1 supports up to 20 A, while MPPT2 and MPPT3 are each rated at only 16 A (per manufacturer datasheet). When using high-current bifacial modules (Isc > 14 A, Imp > 13 A) on the second or third string, the 16 A ceiling may become a limiting factor in module selection and will require additional design verification.
The upper MPPT operating limit is 550 V, which is lower than the 600 V offered by the Fronius Primo G2 or SMA Sunny Boy 6.0. In practice, this restricts the maximum string length for standard 60-cell modules on cold days and demands more careful Voc calculation when designing longer strings.
Alternatives
About the SOFAR 7KTLM-G3 series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.