What you calculate is partial wrong,
12 volts 250ah x8 is 96 volts 250ah or 48volts 500ah or 24 volts 1000ah or 12volts 2000ah.
6 volts 250ah x16 is 96 volt 250ah or 48volts 500ah or 24 volts 1000ah or 12 volts 2000ah or 6 volts 4000ah.
Your battery options is better you either use option #1, 8 12volts 250ah AGM wired 4 in series and parallel two string make it 48 volts 500ah.
You other option is #3 16 6volts 380ah wired 8 in a series and parallel the two strings make 48 volts 760ah. this will last longer and give you more power in case the grid don't come as planned in two hours.
#2 option will be under power as the batteries are not AGM and it will stress the batteries too much, the charging rate is over C8 rate and the discharge rate is also over the C8 rate.
#4 option is way over kill, at 3000ah you have problem to recharge the battery bank properly. and this option will cost you a lot of $$$$$$.
Cheers
12 volts 250ah x8 is 96 volts 250ah or 48volts 500ah or 24 volts 1000ah or 12volts 2000ah.
6 volts 250ah x16 is 96 volt 250ah or 48volts 500ah or 24 volts 1000ah or 12 volts 2000ah or 6 volts 4000ah.
Your battery options is better you either use option #1, 8 12volts 250ah AGM wired 4 in series and parallel two string make it 48 volts 500ah.
You other option is #3 16 6volts 380ah wired 8 in a series and parallel the two strings make 48 volts 760ah. this will last longer and give you more power in case the grid don't come as planned in two hours.
#2 option will be under power as the batteries are not AGM and it will stress the batteries too much, the charging rate is over C8 rate and the discharge rate is also over the C8 rate.
#4 option is way over kill, at 3000ah you have problem to recharge the battery bank properly. and this option will cost you a lot of $$$$$$.
Cheers
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