madmadscientist said:Hi PuppyJump,
I've just read thru this entire thread and I have two questions for you.
1. Do you work for Zap in any way shape or form? Your posts smack a little bit too much of lame viral marketing to me.
2. Where do you get this $30,000 figure for the cost of the tesla batt? Ref please. I have not heard that it is anywhere near that expensive.
thanks,
Daniel Neumansky
Alameda CA
No, I get nothing from ZAP. The dealer even gave me business cards and said that if I refer a customer to them by signing my name on the card, and the customer gives the card to the dealer, then the dealer would give me $100 on the sale. I refuse to do this. I have gladly passed out flyers and cards to people who question me in parking lots, but not with my name on them.
I am not promoting ZAP for personal gain but rather refuting some of what I perceive to be inaccurate criticisms. All along, I have stated the limited application I demand from my ZAP of basically 8 miles distance to my job. In fact, I just posted a set of energy measurements I made on a post whereby I told a reply poster that he would not get his requested range of 50 to 75 miles from a ZAP unless he took very drastic measures.
http://www.endless-sphere.com/forums/viewtopic.php?f=7&t=9430
It remains true that ZAP is, so far, the only off shelf solution to an EV for about $10K that goes faster than 25 MPH. I simply want people to know this because if they have limited demands like I do, then a ZAP can work for them, and more drivers who see the ZAP will become enlightened that EVs are beginning to be possible, though not from established legacy car companies for reasons I've posted elsewhere.
As to the question about the Tesla battery pack costing $30K, Here is what Wikipedia says:
http://en.wikipedia.org/wiki/Tesla_Roadster
"The Tesla Motors Club bulletin board estimated the 2007 ESS replacement cost at approximately $20,000; this cost is likely to decline in the future. Tesla Motors, in February 2009, stated more about the ESS including placing the current replacement cost at slightly under USD$36,000, an expected ESS life span of 7 years/100,000 mi (160,000 km), and began offering owners an option to pre-purchase a battery replacement for USD$12,000 today with the replacement to be delivered after seven years."
....So it looks like Tesla states the cost (ESS stands for Energy Sorage System, ie, a battery pack with BMS) is about $36K but they will sell you one in 7 years for $12K if you prepay right now.
The Tesla pack is made from 6,831 small cells about the size of a "AA" or "C" battery wired in series/parallel strings. It can't be very cheap to wire up this kind of pack considering the BMS that is probably wired up to such a pack. A cheaper alternative would be the Large Format 200 AH LiFePO4 cells all wired in a single series string. This may not have the instant amperage capacity a super sports car needs.