Votronic MPPT 25A Duo 350 Marine Solar Charge Controller: Precision Dual-Battery Charging for Harsh Environments Advanced MPPT Technology for Maximum Solar Yield in Marine and Mobile Applications The Votronic MPPT 25A Duo 350 Marine Version is a high-performance solar charge controller engineered for demanding off-grid energy systems in motorhomes, caravans, and marine vessels. Utilising Maximum Power Point Tracking (MPPT) technology,...