SailNet Community - View Single Post - Optimal propulsion system
View Single Post
  #57  
Old 10-15-2012
Stumble Stumble is offline
Senior Member
 
Join Date: Feb 2012
Location: New Orleans Louisiana
Posts: 1,754
Thanks: 6
Thanked 38 Times in 36 Posts
Rep Power: 3
Stumble is on a distinguished road
Re: Optimal propulsion system

Julie,

Tesla is using lithium ion batteries last I looked. Figure an energy density on them of about 2% by weight compared to gas. So to replace a gallon of gas you would need roughly 325lbs of batteries. The Tesla battery pack weighs around 900lbs, so figure the energy equivalent of 3 gallons of diesel. And they aren't cheap, the battery pack which is good for a nominal 4 years cost roughly $36,000. So even assuming electricity is free it's going to cost you $8,500 a year in battery packs.

At today's fuel prices you would have to be doing a lot of motoring to come anywhere close to justifying it from a cost advantage.
__________________
Greg Rubin
Attorney
Reply With Quote Share with Facebook