Boost converter efficiency - worth it? Part 1

An experiment which I wanted to do for a long time. We have used DC buck converters for a while now, but the question came up if it is possible to charge a battery from a source which has a lower voltage than the battery itself.
I explain all the basics of power conversion before we finally do the first experiment and trying to charge the big 50V LiFePO4 battery from a 12V source. Will it work and how much loss do we have in the boost process? Could this be a viable solution for charging batteries?
Interested in DC buck and boost converters?
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