ABB inverters offer wide voltage ranges, and two MPPT circuit inputs, increasing flexibility in module installation and string sizing. Most inverters are configurable for 240 VAC single-phase, 208 VAC three-phase, or 277 VAC single-phase output.
ABB PVI Series grid-tie inverters feature high energy yield and performance efficiencies of up to 97%. These inverters have a field-adjustable “start-up voltage” point that allows low-end PV operating voltage down to 90 VDC. While there is some loss of efficiency at lower voltage settings, inverters can operate with as few as five standard 60-cell modules in series. Please see the inverter sizing chart in the System Design section for configurations that work in most areas. All ABB inverters come with a 10-year warranty.
ABB PVI and UNO Transformerless Inverters
The ABB PVI and UNO series of inverters are some of the most flexible string inverters available. These ABB inverters have two separate MPPT inputs, allowing for two sub-arrays to be configured with differing string lengths, orientations, or even different PV modules. Conditions on one MPPT will not affect the other. Additionally, the 5 kW and larger inverters have two input terminals for each separate MPPT section allowing as many as four strings of modules (two on each MPPT) to be connected without separate string fusing. Both MPPT inputs can also be paralleled for use with a single array. A wide input voltage range allows for smaller installations with reduced string sizes where needed.
An integrated LCD displays real-time operating parameters, and RS-485 and USB interfaces can connect remote monitoring systems. An integrated DC disconnect is standard on all models shown here. ABB inverters can produce full-rated power at ambient temperatures up to 122 °F (50 °C). The fan-less design and NEMA 4X enclosure enable deployment in extreme environments. Output voltage can be set for 240 VAC split-phase, or 208 VAC or 277 VAC (480 VAC WYE) for three-phase systems (three inverters required for phase balancing).
Where NEC 2014 690.12 rapid shutdown code requirements have been adopted, ABB has introduced two new versions of the ABB Rapid Shutdown Box which cuts off DC voltage and current between the array and the inverter when activated. ABB transformerless single-phase inverters are available in sizes covering most common residential requirements, and can be used in groups of three for commercial three-phase applications. The transformerless design reduces internal power losses for high efficiencies. Output voltage can be set to 240 VAC split-phase, or 208 VAC or 277 VAC (480 VAC WYE) for three-phase systems.
- Available in sizes from 3 kW to 8.6 kW with dual-MPPT DC intputs
- Internal Arc Fault Circuit Interrupter (AFCI) for added safety per NEC 2011
- Field selectable 208, 240 or 277 VAC output
- RS485 Communications interface included
- Operating temperatures of -13 °F to +131 °F (-25 °C to +55 °C)
- Active and reactive power control, low voltage ride-through
- 10-year warranty
- Listed to UL 1741-2010 for U.S.A. and Canada
- Compliant with: IEEE 1547-2003, IEEE 1547.1, UL1699B-2013, ANSI/IEEE C62.41, FCC Part 15 A & B, C22. 2 No. 107.1-01 (Sept. 2011)
- Product Manual
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