SailNet Community - View Single Post - Battery Sizing - am I crazy?
View Single Post
  #22  
Old 11-20-2012
chef2sail chef2sail is offline
Banned
 
Join Date: Nov 2007
Location: Maryland
Posts: 7,069
Thanks: 30
Thanked 58 Times in 54 Posts
Rep Power: 0
chef2sail will become famous soon enough
Send a message via AIM to chef2sail
Re: Battery Sizing - am I crazy?

Quote:
They do have lots of Ah's but of course it takes two before you can compare those Ah's to a 12V battery. In terms of energy density by weight you can compare two 60lb batteries on Deka's website:

21.35 Wh/lb for the Group 31 (59 lbs, 105ah)
21.32 Wh/lb for the Golf Cart GC10 (60.5 lbs, 215ah)

Basically a rounding error in terms of the difference. I've run the numbers on density by volume and again it comes out the same. So there may be advantages for the GC's but it's not density.
Not sure what this means.


Of course you need two 6- volts to get 12 volt current. The advantage of them is that the footprint for the 2- 6 volt is almost the same as 1 12 volt. So for the same footprint you get twice the ah. NOt sure what density has to do with it. The advantage is more for the SIZE...irrespective of weight.
Reply With Quote Share with Facebook