Growatt MAC 50-70KTL3-X series are three-phase grid-tie inverters (on-grid) for commercial and industrial installations where reliable operation, high energy yield, and convenient service are key. The application of three independent MPPTs facilitates designing PV fields with different orientations or partial shading - each tracker can perform individual optimization, minimizing daily yield losses. In practice, this helps better utilize rooftop areas, carports, and ground-mounted complex installations.
Worthy of attention is the high European efficiency, which genuinely translates to better yields under typical operating conditions in Poland, not just in laboratory maximums. The series also prioritizes safety with II-type surge protectors on both DC and AC sides and a sealed casing facilitating installation in demanding environments. Monitoring and operation are straightforward thanks to online services and local configuration in the app, with communication including, among others, RS485, USB, and WLAN. These are not hybrid inverters - for energy storage systems, dedicated solutions should be selected. Standard features include the manufacturer’s warranty and a complete set of popular certifications for grid connection.
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The maximum efficiency of 98.8% places the MAC 50-70KTL3-X series above many competitors in the commercial segment (SMA Sunny Tripower Core2 achieves up to 98.5%). High European efficiency translates into tangible benefits in Polish conditions, not just in laboratory peak power.
Each of the 3 trackers independently optimizes the performance of a separate PV section, which, in commercial installations on building roofs or parking canopies, effectively reduces energy losses due to partial shading or different orientations of the panels. A wide MPPT range (200-1000 V DC) at a maximum voltage of 1100 V DC provides significant design flexibility for string configurations.
Factory-installed Class II surge protectors on both sides eliminate the need to purchase and install separate protective devices (saving several hundred złotys per UPS). The IP65 enclosure allows for direct outdoor mounting without the need for a complex rack cabinet, which reduces installation costs.
The series includes both low-voltage (LV) and medium-voltage (MV) versions within the same product line, allowing designers to match the topology to the existing network infrastructure of the facility without changing the inverter model and simplifying service logistics.
Standard RS485 and USB connections allow integration with SCADA and BMS systems without the need for additional converters, while the WLAN module enables quick configuration via the ShinePhone app and online monitoring via ShineServer. Production data is stored locally for up to 25 years.
The standard manufacturer warranty is 5 years, while Fronius offers a 10-year warranty without additional costs, and SMA allows for an extension up to 20 years at the time of purchase. For commercial installations with an anticipated lifespan of 20-25 years, this means the need to purchase an extended warranty, which also incurs a cost.
Growatt is not listed on the current list of bankable inverter manufacturers according to BloombergNEF (tier_1_bankable: false), which could be a barrier when seeking project financing or meeting the due diligence requirements of institutional investors and banks providing loans for large commercial and industrial (C&I) installations.
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About the MAC 50-70KTL3-X series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.