Ginlong Solis S6-GR1P K-M is a single-phase grid-tie inverter designed for home installations, where stable grid performance and high self-consumption are key. It features an advanced MPPT algorithm and string inverter design, enabling rapid response to sunlight changes and maintaining high energy production levels under typical European conditions. Depending on the variant, configurations with MPPT are available, simplifying the design of rooftop systems with various orientations or partial shading-allowing better utilization of multiple panels and minimizing yield losses.
The high European efficiency translates to real-world performance during daily operation, not just in laboratory settings. The series also offers online monitoring-conveniently via communication modules (e.g., WiFi/LAN) and the app, facilitating diagnostics and energy export control. An additional advantage is AFCI protection, enhancing DC-side safety. This is an excellent choice for Polish prosumers seeking a modern inverter with clear monitoring, grid certification, and reliable manufacturer warranty.
Ranking
Price offers
| Shop | Country | Price | Per kW | Stock | Offer updated | Link to shop |
|---|---|---|---|---|---|---|
| Sklep Soltech | Poland | 1 012.24 zł net | 674.83 zł/kW | Not stated | 20h ago | Visit shop |
Specifications
Pros and cons
The K-M series achieves a maximum efficiency of 97.3% (Ginlong datasheet, version 0.7-3.6 kW), placing it among the leading compact single-phase inverters in this power class. European efficiency (weighted according to the EU solar irradiation profile) translates into a real annual yield higher than that of previous generation S5 devices.
The integrated arc fault circuit interrupter (AFCI) compliant with NEC 690.11 reduces the risk of fire on the DC side without the need for external modules. This is a significant advantage in the context of increasingly strict insurance requirements for roof-mounted installations in Poland.
The series is certified according to VDE-AR-N 4105, EN 50549-1, CEI 0-21, and IEC 62116/61727 standards, ensuring compliance for connection to distribution networks throughout Europe (including Poland). No additional testing is required when submitting a micro-installation for approval by the relevant authority.
Ginlong (Solis) has maintained its status as a Tier 1 PV Inverter Manufacturer according to BloombergNEF for several years (most recently confirmed for Q1 2025), and is the third-largest inverter manufacturer in the world. Bankability refers to the availability of bank financing and the long-term reliability of service, which are crucial factors for project developers and investors.
The integrated EPM module allows for limiting export to the network (e.g., to 0 W) without an external meter or controller. This is particularly useful in the Polish net-billing environment, where surplus energy is sold at a low market price, and self-consumption is prioritized.
The K-M series only has one MPPT input (unlike the K-DC variant, which has two MPPT inputs). Installations on roofs with two orientations or partial shading will experience a loss of efficiency - the designer will need to opt for the more expensive K-DC variant or use DC optimizers.
The power range of 0.7-3.6 kW makes the K-M system suitable only for the smallest prosumer installations. For a typical single-family home in Poland (an optimal power of 5-10 kWp), a different variant or series connection would be necessary, which would complicate the project.
The manufacturer provides a standard 5-year factory warranty. An extension to 20 years is available for an additional fee (product 'warranty extension' from pnp.energy), while some competitors (e.g., SMA, Fronius) offer 5-10 years at the price of the device or with more favorable extension terms.
Alternatives
About the S6-GR1P K-M series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.