KSTAR KSG / G — three-phase string inverters, 25–350 kW, for commercial, industrial and utility-scale solar plants
The KSTAR KSG and G lines cover three-phase string inverters rated 25–350 kW for commercial and industrial rooftops and ground-mounted solar plants. Most models operate from 1100 V DC, while the G350KTH is rated for 1500 V. Ingress protection is IP66.
- Models
- KSG-25/30/40KT-M1, G30–50KT7, G50/60/80KT, G75KTL (220 V), G125KT7, G350KTH/KTHC; also KSG-120CL-M0, KSG-250UH
- Max. DC voltage
- 1100 V (G75KTL — 800 V, G350KTH — 1500 V)
- MPPT
- 3–16
- Max. efficiency
- 98.5–98.8 %, G350KTH — 99 %
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
USK ENERGY supplies KSTAR equipment as an official partner of the manufacturer. All KSTAR products
Description
The KSG and G lines consist of three-phase grid-tied string inverters from 25 to 350 kW. They include KSG-25/30/40KT-M1, G30–50KT7, G50/60/80KT, G75KTL for a 220 V grid, G125KT7 and G350KTH/KTHC, as well as KSG-120CL-M0 and KSG-250UH. The first models are installed on the roofs of commercial and industrial buildings, the more powerful ones on ground-mounted solar plants.
The maximum DC voltage is 1100 V for most models, 800 V for the G75KTL, and the G350KTH is rated for 1500 V, which is needed for large plants with long strings. The number of MPPTs depends on the model and ranges from 3 to 16. In the G50–80KT series, four independent MPPT channels operate in the range 200–1000 V, with up to 45 A per input. This suits arrays with different orientations and partial shading.
Maximum efficiency is 98.5–98.8 %, and 99 % for the G350KTH. Weight rises with power, from 48.7 kg for the G50KT to 125 kg for the G350KTH, so a wall or frame for the larger models needs reinforced mounting. The enclosure has IP66 protection.
The inverters supply and absorb reactive power within a range from 0.8 inductive to 0.8 capacitive power factor. A night SVG function, which compensates reactive power when the plant is not generating, is available as an option. The G50–80KT has a Type II SPD on DC and AC and residual current monitoring, and optionally string fault monitoring and PID recovery. Communication is via Wi-Fi as standard, and optionally via 4G. For string design, the maximum DC voltage at minimum temperature and the permissible MPPT input current are used. Inverters of this class are hung on a frame or wall next to the array to shorten the DC cable runs; for large models, free space is left for cooling. Monitoring is carried out through a Wi-Fi logger, optionally through 4G.
The list of standards depends on the model and covers EN/IEC 62109-1 and 62109-2, IEC 61727, IEC 62116, EN 50549-1, VDE-AR-N 4105, VDE 0126-1-1, CEI 0-21 and NC RfG. The final selection of models and the number of strings is best agreed with a manager.
Technical specifications
| Models | KSG-25/30/40KT-M1, G30–50KT7, G50/60/80KT, G75KTL (220 V), G125KT7, G350KTH/KTHC; also KSG-120CL-M0, KSG-250UH |
|---|---|
| Max. DC voltage | 1100 V (G75KTL — 800 V, G350KTH — 1500 V) |
| MPPT | 3–16 |
| Max. efficiency | 98.5–98.8 %, G350KTH — 99 % |
| Euro efficiency | up to 98.5 % |
| Ingress protection | IP66 |
| Weight | 48.7 kg (G50KT) – 125 kg (G350KTH) |
Request a price and lead time
KSTAR KSG / G — three-phase string inverters, 25–350 kW, for commercial, industrial and utility-scale solar plants. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What DC voltage do the KSTAR G inverters withstand?
Most models operate up to 1100 V, the G75KTL up to 800 V, and the G350KTH is rated for 1500 V.
How many MPPT channels does the KSTAR G50–80KT series have?
Four independent channels with a range of 200–1000 V. The input current is up to 45 A per MPPT.
What is the weight of the KSTAR G inverters, and what is the ingress protection rating?
The weight ranges from 48.7 kg for the G50KT to 125 kg for the G350KTH. The enclosure is rated IP66.
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