SAMLEX's EVOLUTION F Series EVO-1212F inverter / charger pure sine wave inverter / charger with six (6) programmable charging profiles – 2, 3, and 4 stages with equalization. For use with lead avid or lithium batteries. Samlex Evolution(TM) series inverter / chargers provide reliable AC power wherever it’s needed. For use with boats, RVs, cabins, and specialty vehicles, as well as alternative energy, backup, and emergency power applications.