Enerdrive B-TEC 2 x 100Ah Lithium Battery & Charger Bundle, 5 Year Warranty The 2 x Enerdrive 100Ah lithium batteries, when used in combination with a 40A DC-to-DC charger, is typically part of a setup commonly used in various applications, including off-grid power systems, recreational vehicles (RVs), boats, and other mobile power needs The AC charger becomes relevant when you are connected to an AC power source, such as a campsite with electricity hookups or a marina with shore power It provides a convenient means to recharge the battery bank when AC power is available Bundle Includes: 2 x EPL-100BT-12V-G2 – Enerdrive B-TEC 100Ah Lithium Battery EN3DC40+ – Enerdrive 40A DC to DC Battery Charger AC Charger Options: EN31220 – Enerdrive 20A AC Battery Charger EN31240 – Enerdrive 40A AC Battery Charger Here's how these components work together: The 40A DC2DC charger takes charge of replenishing the lithium battery bank during travel or when solar panels are accessible, ensuring an efficient battery charging process When connecting the AC Charger, you are able to link the AC power source By connecting to example a campsite power source, you will have the convenient method to recharging the battery while parked The combination of both DC and AC charging options offers versatility in recharging your battery, catering to various scenarios The DC charger is apt for charging on the move, while the AC charger proves valuable when you're stationary and connected to the grid This setup offers flexibility in recharging your battery, considering both your mobility and access to AC power sources Bundles 2 x EPL-100BT-12V-G2 EN3DC40+ EN31220 EN31240 K-200-21 * * * K-200-23 * *