MorningStar SunSaver SS-20L-24V 20 Amp 24 Volt With LVD Solar Controller. Morningstar is pleased to introduce SS-20L-24V, part of the third generation of SunSaver. Since its first market introduction in 1996, over 1 million SunSaver controllers have been installed in over 73 countries for numerous solar power systems including oil/gas, telecom and instrumentation, marine and boating, and remote homes. We have retained much of our legacy design including the same ratings, footprint and simple user interface, and have added several new and advanced high value features:MorningStar's products are built from the inside out to deliver more than twice the industry average operating life.