The Growatt MID series are three-phase on-grid (grid-tie) inverters primarily designed for commercial and industrial installations, where stable operation, design flexibility, and efficient service support are crucial. Depending on the variant, configurations with 2/3 or 3/4 MPPT are available, facilitating the division of installations into independent sections - for example, for different roof orientations, varied tilt angles, or partial shading. This translates to better optimization of yields under real-world conditions.
High efficiency, including favorable European efficiency, means lower losses under typical loads and more predictable energy production throughout the year. Standard safety features include surge protectors (DC/AC), and optionally, arc detection.
Monitoring is done through the Shine ecosystem - with WiFi or Ethernet modules and convenient viewing in the app and portal. For investors planning expansion, variants battery ready (XH) are available, designed for future integration with energy storage systems without costly modifications.
Ranking
Specifications
Pros and cons
The MID series achieves a maximum efficiency of 98.8% and an efficiency comparable to European standards (~98.5%) (according to MID 25-40KTL3-X datasheets), placing it among the top-performing three-phase inverters in the C&I (Commercial & Industrial) category and resulting in significantly lower losses even under variable loads throughout the year.
The availability of variants with 2/3 or 3/4 independent MPPT trackers (DC voltage range of 200-1000 V) allows for the design of installations with different roof orientations or partial shading, without the need for external optimizers, which reduces the overall system cost.
IP66 protection (resistance to heavy rain and dust) and built-in surge protection devices (SPD) of Type II on both sides (DC and AC) are standard features in the base version of the series, while some competitors in this segment only offer SPDs as an optional, paid feature.
MID 11-30KTL3-XH models are equipped with pre-installed connectors and firmware for seamless integration of a storage system without replacing the inverter. In commercial installations with planned expansion, this eliminates future replacement costs, typically ranging from 3,000 to 8,000 zł per connection point.
The integrated RS485 interface, with the option of a WiFi or Ethernet module, and integration with the Growatt ShineServer platform, enable remote management and alarming without the need for an additional data logger - a significant cost saving in multi-inverter installations.
Growatt is not listed on Bloomberg NEF's Tier 1 list for inverters, which could make it difficult or impossible to obtain project financing from banks that require bankable equipment. This represents a significant barrier for commercial installations financed with investment loans or leases, compared to SMA, Fronius, or Huawei.
Independent installer reviews (including SolarQuotes AU and Paradise Solar Energy) indicate a higher failure rate for Growatt inverters compared to premium-class European competitors. This means that for commercial properties with high availability requirements (e.g., industrial facilities, shopping malls), the cost of downtime must be factored into the Total Cost of Ownership (TCO) analysis.
Growatt has been in operation since 2010, which is approximately 15 years, compared to SMA (since 1981, 45 years) or Fronius (since 1945). In the context of commercial installations with a 25-year lifespan, a shorter market presence is a factor of risk when assessing the long-term availability of service and spare parts.
Alternatives
About the MID series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.