Here’s one for the engineers:
Which would be the better battery set-up for a house bank?:
OPTION 1:
2 Interstate U12VGCUTL 12V Golf Cart batteries wired in parallel
Each battery has 155 Ah capacity at @20 Hr, reserve capacity of 292 min at 25A draw, 77 min at 75A. Each weighs 90 pounds and measures 13 5/8 x 7 1/16 x 11 3/8.
This set-up will yield 310 Ah capacity @ 20 Hr, a reserve of 584 min at 25A draw, 154 min at 75A draw.
OPTION 2:
2 Interstate GC-2 6V Deep Cycle batteries wired in series
Each battery has 232 Ah capacity at @20 Hr, reserve capacity of 474 min at 25A draw, 122 min at 75A. Each weighs 63 pounds and measures 10 1/4 x 7 1/8 x 11 1/8.
This set-up will yield 232 Ah capacity @ 20 Hr, a reserve of 474 min at 25A draw, 122 min at 75A draw.
Here’s the link to Interstate for the stats on these batteries:
http://www.interstatebatteries.com/www_2001/content/products/product_marine.asp
Check my math, but just going by the numbers, it seems that Option 1 would be the better choice. My concern is the construction of a 12V vs. a 6V. There is no information to compare the plate size, number, and design within Interstate and between manufacturers. Is there any reason to believe that the 12V batteries will not last as long as the 6V batteries?
Which would be the better battery set-up for a house bank?:
OPTION 1:
2 Interstate U12VGCUTL 12V Golf Cart batteries wired in parallel
Each battery has 155 Ah capacity at @20 Hr, reserve capacity of 292 min at 25A draw, 77 min at 75A. Each weighs 90 pounds and measures 13 5/8 x 7 1/16 x 11 3/8.
This set-up will yield 310 Ah capacity @ 20 Hr, a reserve of 584 min at 25A draw, 154 min at 75A draw.
OPTION 2:
2 Interstate GC-2 6V Deep Cycle batteries wired in series
Each battery has 232 Ah capacity at @20 Hr, reserve capacity of 474 min at 25A draw, 122 min at 75A. Each weighs 63 pounds and measures 10 1/4 x 7 1/8 x 11 1/8.
This set-up will yield 232 Ah capacity @ 20 Hr, a reserve of 474 min at 25A draw, 122 min at 75A draw.
Here’s the link to Interstate for the stats on these batteries:
http://www.interstatebatteries.com/www_2001/content/products/product_marine.asp
Check my math, but just going by the numbers, it seems that Option 1 would be the better choice. My concern is the construction of a 12V vs. a 6V. There is no information to compare the plate size, number, and design within Interstate and between manufacturers. Is there any reason to believe that the 12V batteries will not last as long as the 6V batteries?