Fronius IG Plus V inverters offer high efficiency, intelligent thermal management, light weight and easy installation. The inverters' integrated LCD displays and records over 20 inverter and system operation parameters. All Fronius IG Plus V inverters include a lockable code-compliant DC disconnect with a built-in 6-circuit fused string combiner that can remain on the wall when the inverter is removed for servicing. The internal string combiner can accept fuses up to 20 A per circuit. Fuses sold separately (see Electrical Distribution for KLKD fuses). 2 busbars (one of each polarity) are required to bypass the internal combiner for higher current inputs, such as when an external combiner box is used.
Fronius inverters have 3 expansion slots that allow you to add external sensors, remote displays, or other options. Inverter firmware upgrades can be made using a PC or laptop. The 5kW and larger inverters have multiple power stages that can inactivate during periods of low insolation to maximize efficiency and energy harvest.
The single phase inverters are field selectable 208, 240, or 277 VAC and are available in sizes from 3kW to 11.4 kW. These inverters can also be used in three-phase systems by using three inverters, each connected across two phases. The IG Plus 10.0-3, 11.4-3 (Delta), and 12.0-3 (WYE 277) have true three-phase output and a single inverter will put current on all three phases.
All IG Plus V inverters are designed for operating temperatures of -13°F to +131°F (-25°C to +55°C), and can be field configured for either positive or negative ground PV arrays.
These inverters are Listed to UL 1741-2010 for U.S. and Canada and compliant with IEEE 1547.1, ANSI/IEEE C62.41, FCC Part 15 A & B, NEC Article 690, and C22. 2 No. 107.1-01 (Sept 2001). Each inverter is covered by a 10-year warranty, which can be extended to 15 or 20 years.