Re: newbie battery question
IMHO, it all depends on the batteries. With multiple batteries in series, you can have differing resistance in the cabling that you won't have in a (good) battery. Amp/hours are amp ours if you are comparing apples to apples.
You could make the argument that if one battery fails you only have to buy one new one instead of a whole new string. The problem there is that any new batteries in a string will quickly "take on the age" of the oldest one.
Please note, being a moderator does not add any weight to my opinions 300 watts Siemens/BP panels,plus a Sun 90,, making ~400. ~30 amps into Rogue MPT-3024, 450 ah of Trojan T-105, Morningstar ts300 inverter, a Tri-Metric meter.a collection of antique generators, plus 2 Honda eu-1000i's (also a BS2512 IX controller) and assorted other stuff!