a theoretical 14v system would it work??

[Eastward ho 24]

Firefly oasis has 2/4v 450 ah batteries.. It was brought to my attention that a (3)4v series house bank is 450 ah with 60% avail dod. This is the bank I think I'm going with. It was brought to my attention this is a pretty good system only problem is if one battery goes im down to 8v and innoperable. I had the odd idea that if were too add a 2v in there too give me 14v and if one goes bad I'm back at 12v. Now I know a 12.8 v system is the norm. But when my alternators bulk charging isn't my other electronics running on the same 14v? I'm thinking most 12v electronics run from 14 to 10v? I'm not saying I want a 14v system. Just brainstorming .And from a cost standpoint (4) 4v firefly's is alot and the math i$ probably bad..I'm replaceing my batteries and I'm looking at the claims of 4900 cycles at 50% dod and psoc not killing them. A 450 ah bank (225 useable at 50%dod) for 2k$ with 4900 cycles. Compares lithium 300ah 270 useable (@ 90% dod which I don't believe) for 3k plus $ add in all the extra gizmos with the lithium( sorry I don't fully understand how they operate). These 4v firefly's seem to be the way to go.. unless you believe the 90% dod claims for lithiums. Like I said I'm not looking to do this. Just wondering ...

[smac999]

How are you going to charge the 14v bank? You’d need 16-17v. And that will fry everything connected.

If you are running three 4v and 1 2v? you’d stil be back at 10v if one failed.

The l15s are good. But I have seen a few fail. Installed 6 today in a boat. 3s 2p. 12v 900ah