AiON-SIS and MSSP GEN 2.0 String Inverters Boost Storage Efficiency

LS ELECTRIC America AiON-SIS and MSSP GEN 2.0 inverters deliver grid-ready storage with high efficiency and high power density
April 7, 2026
2 min read
© LS Electric America
AiON-SIS and MSSP GEN 2.0 String Inverters Boost Storage Efficiency

AiON-SIS and MSSP GEN 2.0 string inverters are grid-connected power conversion platforms designed for utility-scale energy storage and renewable energy applications. The AiON-SIS air-cooled inverter supports input voltages from 620 to 1,500V DC and provides output options of 400, 480, and 600V AC. It is available in 116 and 140 kW ratings and is intended to help balance power block sizing, system layout efficiency, and balance-of-system costs. Maximum efficiency exceeds 98.5%, while CEC efficiency exceeds 97.9%.

The AiON-SIS unit uses a modular string-level architecture to enable scaling from kilowatt-level systems to multi-megawatt power conversion deployments. The inverter measures 19 x 10 x 33 in (48 x 26 x 84 cm) and supports installation in containerized and skid-based storage and renewable platforms. Operating temperature range is -10° to 45°C, and it is rated for operation from 0 to 2,000 m altitude.

The MSSP GEN 2.0 liquid-cooled string inverter is designed for high-voltage energy storage architectures and supports 1,050 to 1,500V DC input with 480, 600, and 690V AC output compatibility. Power ratings range from 150 to 220 kW per unit, enabling compact MW-scale power blocks for standardized storage and renewable system designs.

The MSSP GEN 2.0 inverter achieves maximum efficiency above 99% and CEC efficiency above 98.5%. The enclosure measures 15 x 9 x 62 in (39 x 23 x 157.5 cm). Operating temperature range is -20° to 50°C with altitude capability from 0 to 2,000 m.

Both inverter platforms support grid-connected storage conversion with four-quadrant operation and autonomous voltage and frequency regulation for active and reactive power support. The systems are designed for integration into engineered turnkey energy storage and renewable energy platforms.

Features:

  • Air and liquid-cooled inverter options
  • Input ranges of 620 to 1,500V DC
  • Output compatibility from 400 to 690V AC
  • Power ratings from 116 to 220 kW
  • Maximum efficiency above 98.5 to 99%
  • Modular string-level architecture
  • Operating ranges from -20° to 50°C
  • Altitude operation up to 2,000 m
  • Four-quadrant power control
  • Voltage and frequency regulation support

LS Energy Solutions | a division of LS ELECTRIC America
Charlotte, NC
(980) 221-0654
[email protected]
ls-es.com