25A PWM CONTROLLER: Morningstar SunSaver Duo Pulse Width Modulation (PWM) 25A solar charge controller delivers reliable dual battery charging for RV caravans, boats, cabins and other off-grid systems. It regulates the power of from the solar array to the battery bank. Benefit from low self-consumption and consistent energy harvesting efficiency. LONGER BATTERY LIFE: This controller extends battery life with series PWM four-stage charging and temperature compensation. It supports DIP switch selectable options for sealed or flooded batteries as well as free MSView software for more refined battery setting adjustments EASY INSTALLATION: Enjoy hassle-free setup with factory pre-sets or adjust accordingly with DIP switches or free MSView software. Electronic protections safeguard against wiring mistakes, ensuring safe and straightforward installation. Each SunSaver comes with a wire terminal cover for added convenience. ELECTRONIC PROTECTIONS: These controllers feature built-in electronic protection against surges, short-circuits, overloads, and reverse polarity. They include high voltage and high temperature disconnect to safeguard against damage to electrical components. Advanced self-diagnostics alert users to installation or operational errors, while automatic recovery occurs when short circuits are cleared. TRUSTED RELIABILITY: Morningstar Corporation is a US company established in 1993 and is a global leader in manufacturing PWM and MPPT solar charge controllers, inverters, and accessories. Renowned for the industry's lowest hardware failure rate, Morningstar provides dependable, innovative technology for advanced solar applications. Morningstar products include U.S. based Tech Support and are the top choice for mission-critical users.