Help me pick an LFP battery option

So, I had pretty much decided to get a EG4 12v/400A server rack battery to add to the 2 12v/100A SOK in my RV, to expand storage as I want to add a residential fridge. Tonight, however, Will put up a new video comparing server rack batteries where he noted his preference for the SOK build quality in a high vibration environment. The SOK, however, only comes in 48v. (pricing difference is another issue for a different discussion), The 48v version potentially could be a plus for part B of my plan (also for a separate discussion). My question is can I place a 48v to 12v buck converter in line and then place the battery in parallel with my existing 2 100 A SOKs to feed the inverter (12v / 3Kw)? If this would work what size (amp capacity) converter should I use and can you suggest a source? Most converters (48 to 12) I have found are 10 amps +/- and the largest so far is 30 amps. The alternative would be to go with the EG4 12v and use a racking system with supports to absorb some road vibration. This will be in a Motor Home as opposed to a travel trailer so a bit less jostling. Look forward to your input.

Your plan seems inpractical . Needing a charger for the 48 volt battery and conversion. If you go this route a 48 volt inverter would be a suitable power converter.
Since your RV system is 12v and you have a 12v inverter, just add 12v batteries to your existing system.

What's plan B? Just asking.

Mike

OP, you are making it too complicated.
If you want 12V and have (2) SOK 12V already, just add 2 more.
Don't put a converter between 48v and 12v, it will become a PITA to troubleshoot and I doubt you will ever get them to charge and discharge at the same rate.
Just make sure you tie down the packs so they will not move and you should be fine.

mikefitz said:

Your plan seems inpractical . Needing a charger for the 48 volt battery and conversion. If you go this route a 48 volt inverter would be a suitable power converter.
Since your RV system is 12v and you have a 12v inverter, just add 12v batteries to your existing system.

What's plan B? Just asking.

Mike

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GO with individual 100 A 12v units but since EG4 also comes in 12v (400 A) I think I will go that route.

1holaguy said:

GO with individual 100 A 12v units but since EG4 also comes in 12v (400 A) I think I will go that route.

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Don't even bother with server rack batteries unless you're going to 48V... When you realize that things aren't going to work out with your 12V server rack batteries make sure to post a thread about it so we can point out that you were warned.