The SOFAR 3-6KTLM-G3 series is a single-phase grid-tie inverter designed for home and small commercial installations, known for stable operation, simple configuration, and high energy yield under Polish conditions. Its key advantage is the dual MPPT - two independent trackers simplify optimization, especially when modules are on two roof tilts, have different orientations, or experience periodic shading. In practice, this means fewer losses and more predictable system performance.
High European efficiency translates to real daily energy gains under typical operating conditions, not just ideal lab scenarios. Monitoring and communication are available - depending on the version and configuration, via WiFi, and optionally Ethernet, facilitating production monitoring in the app and quick diagnostics. This is not a hybrid inverter, so it does not directly work with energy storage systems. The series includes required certifications for the EU market, and the standard warranty is typically 10 years.
Ranking
Specifications
Pros and cons
A 97.3% EU efficiency rating places this series at the top of the budget-to-mid-range single-phase grid-tied inverter segment. By comparison, competing models at this price point (e.g., Growatt MIN TL-X) typically achieve 97.0-97.5% EU efficiency - a difference that translates to approximately 10-20 kWh/year in favor of the G3 in a typical 5 kW system.
Two independent MPPT trackers with a wide input voltage range of 50-570 V allow strings of different orientations or tilt angles to be connected without mutual shading losses. The 570 V DC ceiling supports longer strings - up to approximately 18-20 standard 60-cell modules - eliminating the need for power optimizers.
The IP65-rated enclosure and fanless natural convection cooling eliminate moving parts prone to failure, keep noise below 25 dB(A), and make the inverter well suited for indoor installation in residential buildings. An operating temperature range of -30…+60°C ensures reliable year-round performance under Polish climatic conditions.
At 10 kg and 345×341×167 mm (H/W/D), the unit can be installed by a single technician without specialized lifting equipment. For reference, Fronius Primo inverters of the same power class weigh 16.3 kg - the G3 is approximately 39% lighter, meaningfully reducing installation time.
Sofar Solar was awarded a Grade A rating in the Wood Mackenzie Inverter Bankability Report (H1 2025), recognizing manufacturers that meet rigorous ESG criteria, R&D investment levels, and production capacity utilization benchmarks. This confirms the manufacturer's creditworthiness and the long-term reliability of warranty support in the European market.
The series does not support battery storage or backup power operation. Adding energy storage to the system requires replacing the inverter with a hybrid model (e.g., SOFAR HYD G-series or a competing hybrid unit) or purchasing a separate AC-coupled device. Given rising energy prices and growing demand for storage, this is a significant limitation for systems intended to operate for 10+ years.
The standard communication interfaces are RS485 and Bluetooth; Wi-Fi and Ethernet connectivity are optional and require a separately purchased communication module (Wi-Fi Stick or DataHub). Some installers report that the Wi-Fi module is not consistently included in the package, potentially adding approximately 30-60 EUR to the project cost and delaying monitoring commissioning.
Alternatives
About the SOFAR 3-6KTLM-G3 series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.