What Size DC-DC Charger for a 100Ah LiFePO4? 20A, 30A, 40A or 50A (The Alternator Decides, Not the Battery)
A 100Ah lithium battery will take more current than any of these chargers can give it. What sets the size is the alternator behind it, the cable in front of it and how many hours you drive between camps. The charge times, the input draw and the cable table, from the makers’ own sheets.









