The new Sunmaster IP44 series: the new generation of compact, easy to install, high performance grid connected inverters from Mastervolt. With the new Sunmaster IP44 series efficiency and optimum power output are guaranteed, even in the most arduous of locations. Mastervolt is proud to offer you yet another innovative product with the introduction of a new and advanced LCD display with miniature data logger - storage of data for up to 30 days - giving you the profitable facts.