P=parallel connected & S=series connected and their combinations throughout examples...
Notice the cost/wh (watthour) for the GC_2 Golf Cart Batteries...Battery Capacity = Voltage x Amp Hours = Watt Hours.
So you have 8 units x 6-volts x 230 AH = 11,040 watt hours of capacity.
There are 4 ways you can configure them, 6, 12, 24, or 48 volts:
8P = 6 volts @ 1840 AH = 11,040 watt hours
2S4P = 12 volts @ 920 AH = 11,040 watt hours
4S2P = 24 volts @ 460 AH = 11,040 watt hours
8S = 48 volts @ 230 AH = 11,040 watt hours
No mater how you configure them, you have 11,040 watt hours. Now for the bad news. Rule 1: You never ever want to configure batteries in parallel unless it is absolutely necessary and if you do will severely shorten cycle life. Thus with 8 of your batteries 48 volts is the way to go. Rule 2 never mix old with new batteries under any circumstances.
Series Batteries Rule: Voltage Adds, AH does not add. So 8 x 6-volt 230 AH batteries in series (8S) is 48 volts @ 230 AH
Parallel Batteries Rule: Amp Hours add, voltage does not add. So 8 x 6-volt 230 AH batteries in parallel (8P) is 6 volts @ 1840 AH.
Watt Hour capacity adds regardless of configuration.
Lastly use as high of a battery voltage as possible as this will say you MONEY and gain efficiency. A good rule of thumb is never exceed 800 AH at any given battery voltage. A 80 Amp Controller has the following panel wattage limitations.
1000 watts @ 12 volts
2000 watts @ 24 volts
4000 watts @ 48 volts
Just remember AH does not mean much of anything without a VOLTAGE. Here some simple formulas.
Watts = Voltage x Current
1200 watts = 12 volts x 100 amps
1200 watts = 24 volts x 50 amps
1200 watts = 48 volts x 25 amps
1200 watts = 120 volts x 10 amps
Amps = Watts / Voltage
100 amps = 1200 watts / 12 volts
50 amps = 1200 watts / 24 volts
25 amps = 1200 watts / 48 volt
10 amps = 1200 watts / 120 volts
Volts = Watts / Amps
12 volts = 1200 watts / 100 Amps
24 volts = 1200 watts / 50 Amps
48 volts = 1200 watts / 25 Amps
120 volts = 1200 watts / 10 Amps
Amp Hours = Amps x Hours
Hours = Amp Hours / Amps
Amps = Amp Hours / Hours
Watt Hours = Watts x Hours
Watts = Watt Hours / Hours
Hours = Watt Hours / Watts
Hope This Helps