Jay, As David already suggested - you probably killed the pay way before its time due to daily complete re-charge after very short drives. I too have 20 Golf cart style batteries in a light truck (89 Ford Ranger). If I drive only 4 miles on a day, I don't charge at all until I have driven more and it makes sense to charge, otherwise I am wasting too much power on equalization which does not result in miles, only in water loss. I see the effect also from your electricity cost. While I do not know how many kWh you actually used, my guess would be that $484 means around 4000kWh. which means that you used about 0.8 kWh per mile and that is twice the amount that I would expect to see for careful EV driving of a light truck. My own consumption is slightly over half kWh per mile due to the waste in the automatic transmission that was kept in this conversion (almost 20 years ago - not my idea). I bought this truck with almost new batteries (the controller failed after the previous owner had a couple hundred miles on them) and I have added about 5400 miles in the past 1.5 years (minus several months when I was out of town during that time). There is no sign of degradation, other than that in these colder months where many nights are below 50F and days hardly go over 60F, the range is somewhat limited to drive far in a single trip. If I drive, then wait a while and several hours later drive back, I can still get close to the summer range, but pulling max capacity in one trip is more restricted as can be expected. I charge conservatively and can wait between 2000-3000 miles before watering the pack, which then takes about 3 gallons.
Hope this helps, Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: cwa...@proxim.com Private: http://www.cvandewater.info Skype: cor_van_de_water Tel: +1 408 383 7626 -----Original Message----- From: ev-boun...@lists.evdl.org [mailto:ev-boun...@lists.evdl.org] On Behalf Of Jay Summet Sent: Sunday, November 24, 2013 5:55 PM To: ev@lists.evdl.org Subject: [EVDL] Cost of ownership / Pack Replacement report - Chevy S10 / 120v Lead Acid pack -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm replacing the 20 six volt lead acid golf cart batteries in my 1995 Chevy S10 conversion after 2.75 years (1008 days). My total cost of ownership (electricity, batteries, maintenance) works out to $0.66 a mile (not counting fixed insurance/registration costs). $484 electricity, $2,171 battery, and $610 maintenance. I drive relatively short distances each day, and so have only put 4,861 miles on it over 1008 days, and 685 charge cycles. I expect my cost per mile would be less if I were driving longer trips each day. The batteries were originally purchased at Sams Club ( Energizer Johnson Controls) for $1,800 but I'm using the $2,171 replacement cost at Interstate to calculate the cost of ownership. If I used the actual purchase price for this pack it would be $0.59 per mile. The full writeup can be found here: http://www.summet.com/blog/2013/11/24/electric-pickup-truck-cost-of-owne rship/ Jay P.S. I did not burn 242.5 gallons of gas. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlKSrfgACgkQSWJjSgPNbM8y2ACfYjIWUeIOmjQsWqKHKeXkiytK cGcAoJJu8ChBeTD9Kf6MFM9kJjQAWrDg =KQn9 -----END PGP SIGNATURE----- _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
