the image because the wire lengths is all I can see.
There is no such thing as a stupid question, except for the one not asked.
If you don't know or are uncertain about something, especially something that has the potential to harm, ASK if someone has issues with that, then THEY have the problem and likely best avoided. Yes, sometimes it can be annoying to "seasoned vets" but an 18 year old learning cannot have the knowledge of a 50 year old in the trade. Ces't la vie, mon amis.
Slightly off but not topic.
12V@250A=3000W (25A AC), 24V@250A=6000W (50A AC), 48V@250A=12,000W (100A AC) for quick reference. the (50A AC) can be 120V/50A out to panel or 240V/25A split phase to panel. In simple terms. -- AC 120V/15A=1800W, 240V/15A=3600W uncorrected
? 250A. Because it's recommended to be the MAX draw limit for a standard"single" system. Single, meaning non-stacked inverters and similar.
! Inverter Wattage has to support the watts required plus surge capacity. Should never be run at the limit for an extended period of time (that's undersized).
Batteries in Series add voltage while in parallel they add storage capacity.
KISS applied is ALWAYS BEST, more complicated the more things that have the potentials to cause havoc. Plain & Simple ! Look at Will's diagrams and schema's KISS applied and for good reason.
IE if you know you will regularly pull 4000W or 120VAC/33A, you can do it with a 24V system BUT a 48V for continous is more reasonable.
Series Linking Batteries is legacy Lead stuff. Lead batteries are limited because of size/weight/voltage & AH capacities. They gotta be handled & managed and also modular.
Lithium removes MANY of those limitations. With LFP we can build a 12V to 72V 1000AH Battery Pack ! using 1000AH Cells no less. 12V you could carry but not 24V and up without help ! (1, 1000AH cell = 41kg/90.3lbs)
It IS best to build specifically for your target voltage be it 12V (4S), 24V (8S) or up and then add Battery Packs in Parallel to increase the AH stored. Battery Packs in Parallel split the charge/discharge relative to their capacity ratings and BMS settings if/when applicable.
Why Drop In Batteries can do "some" series ? Because these are in fact designed to be 12V Lead Acid/AGM Battery replacements used in common applications. Only a few do support Deep Cycle cranking and they are identified as such. Some do allow them to operate in Series as their BMS are designed to handle that but NOT ALL. This is also a source of Common Confusion about how battery Banks should be configured.
It is still "Early Days" with Lithium Ion Tech and the DIY'ers are "fresh" when viewed in the bigger pictures, there is still a lot of New Things to learn & understand, all the while the whole sector is evolving faster than any other tech previously. This further reasserts the need to apply the KISS principles.
PLEASE REVIEW This document from Victron starting Page 17. These people are experts in their field.
Hope it helps, Good Luck.