ABB's new central inverter has a 98.8% maximum efficiency with improved efficiency at partial loads to provide a Euro efficiency rating of 98.6%. This, together with a low auxiliary power consumption of only 700 watts for the new sizes at nominal power, results in an inverter with a "very high total efficiency", claims the company. The model also has a 45% higher power density compared to earlier ABB central inverters.
The 875 and 1000 kW central inverters offer a wider operational temperature range, up to 50°C at nominal power, and up to 55°C with power derating. At lower temperatures, the central inverter provides up to a 20% power overloading capability, up to a maximum power output of 1050 kW and 1200 kW at 25°C for 875 kW and 1000 kW inverters, respectively.
"The modular DC input section provides system integrators with a flexible approach," according to a company statement. "This is especially helpful when considering the DC cable type and the number of junction boxes needed. The 1000 kW central inverter is available as standard with eight fused busbar inputs and this can be extended up to 16 inputs. Additionally, the DC input section can be provided with integrated DC current measurement per input".
ABB also explains that as a new feature, PVS800 series inverters are now able to support grid stability at night by providing reactive power with the DC input disconnected.
The new series is designed for multi-megawatt photovoltaic (PV) power plants as well as large PV installations in commercial and industrial buildings.
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