Morningstars third generation ProStar PWM charge controller offers additional features and capabilities while maintaining the same form factor, quality and reliability that has made the ProStar the worlds leading mid-range PWM solar controller for professional and consumer applications since 1995. The PS-15M includes a high resolution graphical meter to adjust settings and display logged data with the capability to store up to 256 days of data logging. The PS-15M also features advanced programmable lighting controls and enhanced surge rating for heavy DC loads. The 100% solid state PS-15M controller has an estimated service life of 15 years.