RioRand (TM) CM30 serial intelligent solar charge controller,solar system controller,solar panel charge regulator (RRCM30-30A-12V24V-Auto-New-V2) Powered by RioRand advanced solar technology The RioRand CM series controller is a kind of intelligent, multi-purpose solar charge and discharge controller. The family use the fixed LCD display, with a very friendly interface; various control parameters can be flexibly set, fully meet your various application requirements.