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Product Briefing Outline: Kaco nowoffers a new generation of central inverters that optimize yield from solar modules configured for large-scale power generation.The Powador XP100-HV central inverter uses DSP-based technology that is intended to offer the highest performance, reliability and efficiency.

Problem: Wattage output from modules varies greatly according to solar radiation during the day and inverters can affect overall efficiencies by being unable to flexibly process/handle varying loads on the system. Uptime (i.e. continuous feed-in) is a constant concern for power generation operating in isolated areas where it can be costly to replace broken inverters leading to lost energy.

Solution: The patented pulse width modulation algorithm (PWM) and loadadaptive clock frequency reduce IGBT switching losses by more than 30%. Depending on the load cycle, the switching frequency is optimised in order to achieve higher degrees of efficiency and better energy yields for the PV plant. Reliability and maintainability are significantly enhanced by redundant power supplies for crucial systems/components, a refined IGBT stack design with laminated DC bus bar, extremely low stray inductance and gate drive interfacing with differential signalling. Depending on the load and environmental temperature, the cooling fans are monitored and controlled in an intelligent way.

Applications: Large-scale power generation facilities segmenting generation areas of up to 100kW in size.

Platform: The XP100-HV central inverters feature fully digital control technology compared to traditional analog electronic designs with the benefit of a reduced number of components. MPP range 450V– 800V; maximum voltage 950V; maximum current 235A. Ripple voltage <3%.

Availability: June 2008 onwards