BCDC1225D In-vehicle Dual Battery Charger. It's a 12 volt, 25A in-vehicle DC-DC battery charger designed to charge your secondary battery banks to 100% state of charge while on the move. Additional features within this Solar Ready charger, such as a Maximum Power Point Tracking (MPPT) solar regulator and built-in Green Power Priority (primary solar selection), means you can charge your batteries using solar panels when driving or portable panels when stationary. With simultaneous DC and Solar inputs, this makes it the most advanced dual battery charger on the market today. Have the reassurance and confidence that your batteries will be charged to their optimal levels, thanks to a unique multi-stage charging algorithm that provides specific charging profiles tailored to all common battery types. The SEMA Global Media Awarding winning BCDC1225D is perfect for charging AGM, Gel, Standard Lead Acid, Calcium, and LiFePO4 batteries. The unit works with 12- or 24-volt vehicle systems and with either standard or variable/smart alternators. This DC-DC battery charger with solar input has been proven to work in all types of terrains, including deep water crossings, and stands up against extreme heat (up to 176 deg F). It's fully sealed against the risk of infiltration from water and dust and will hold up to the adventure at hand. It's designed to maximize the performance and life of your auxiliary battery and is suited for battery bank sizes of 75-200AH in most applications. Made in Australia by REDARC this amazing range has undergone years of testing in some of the harshest conditions on the planet. REDARC has been in business for nearly 40 years and all of our products are made tough enough to take anything nature can throw at them.