To be honest with Li-Ion it’s probably not worth the effort to try to make a highly reliable series pack for one-off use when you can just buy them, especially considering to do so you want matched cells, and getting cells is the largest cost factor.peatop wrote:giving me enough information to build my own battery banks
If I was going to make a pack for marine use, I’d stick to purely parallel (but separately fused) cells and use a DC-DC converter to get 12v from the 3-4v output. Yes you lose a little power but it has the advantage that the entire pack doesn’t stop working when a single cell does.
In practice, I don’t even do that: I use an 18AH SLA and just deal with the extra weight, ‘cause a PA14 ain’t exactly a feather to start with