I have the new EB70, and am beginning to think about getting another battery, likely another “naked” LiFePO4 of about 100 Ah size. Can the EB70 take the input from such a battery via jumper cables to cigarette socket to EB70 “car charger” cable? Should I somehow be limiting the juice coming off of the 100Ah battery into the EB70? I am thinking forward to a time when I have a van or vehicle to build out, and would be utilizing likely separate components rather than a solar generator. Getting a larger “naked” battery now would give me some insurance when conditions do not allow for adequate PV solar charging, to get the EB70 back up toward full.
I did find this YouTube video and it looks pretty straightforward, especially if one uses a 12 to 24 converter.