The Ginlong Solis Solis-(50-60)K series are three-phase grid-tie inverters designed for commercial and industrial applications, where stable operation, flexible string configurations, and fast diagnostics are essential. The use of multiple MPPT (5 or 6) facilitates optimizing energy yields from panels with different orientations, uneven sun exposure, and partial shading-without overcompromising string selection.
In practice, high European Efficiency means fewer losses in real operating conditions, leading to better energy production in Poland’s typical daily profile, not just in the lab. Safety features, such as AFCI, help reduce the risk of DC-side fire hazards, while intelligent string monitoring with I-V curve analysis shortens service time.
Remote management is handled by the SolisCloud platform, featuring communication including RS485 and optionally via WiFi/GPRS, depending on the configuration. This makes it an excellent choice for companies, warehouses, halls, and rooftop solar farms, where monitoring export power, robust casing, and a reliable manufacturer’s warranty are crucial.
Ranking
Specifications
Pros and cons
The Solis (50-60)K series achieves European efficiency levels of 98.4-98.5% (up to 99.0% for the 60K model), placing it among the top performers in the 50-60 kW class of three-phase inverters. For comparison, the EU efficiency of comparable Sungrow SG50CX models is approximately 98.2%, which translates to a realistically higher annual yield under the Polish solar irradiation profile.
The use of 5 or 6 independent maximum power point trackers (MPPTs) allows for connecting strings with different orientations, inclines, and lengths without significant losses due to mismatch. In practice, when installing on complex, multi-tiered industrial roofs (with varying orientations), this provides a clear advantage over inverters with 3-4 MPPTs.
The built-in arc fault detection (AFC) function reduces the fire risk on the DC side - a requirement that insurers are increasingly enforcing in commercial buildings. Analyzing the I-V curve for each string allows for remote detection of degradation or damage to modules without the need for on-site service visits, which shortens the mean time to repair (MTTR).
Ginlong Solis maintains Tier-1 bankability status according to BNEF rankings (H1 2024, H1 2025), meaning that financing projects with these inverters does not require additional security from project banks. The company has been operating since 2005 and has its own R&D center and European service (UK, DE), which reduces the risk of component availability over a 10-15 year period.
The Solis (50-60)K series inverters support parallel connections up to 6 MW using a shared RS485 bus and a single SolisCloud account. This simplifies the management of large rooftop systems (e.g., a 1-4 MW rooftop farm) without the need for additional data concentrators.
The Solis (50-60)K series is based on the S5 (or earlier 4G) platform, while the currently produced S6-GC series offers an MPPT input current of up to 20 A (compared to approximately 12.5 A in the S5), which is significant when working with modern 580-700 Wp bifacial modules. For new projects, this may mean the need to use a larger number of parallel strings and additional fuses.
Ginlong Solis offers a standard 5-year warranty in Europe (with the option to extend it for an additional fee). Fronius and SMA offer extensions up to 10 years through a simplified online procedure, while Huawei SUN2000 offers a standard 5-year warranty with flexible extension options. For projects financed through project finance, an expensive insurance policy covering the missing period may be required.
Alternatives
About the Solis-(50-60)K series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.