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On 11/25/2013 01:59 AM, Cor van de Water wrote: > 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. A year or two back I was charging every two days using a 110v charger (8 miles at a time) but one day one of my batteries got very low on the way home so I decided to charge daily. [that battery failed before all the others, I replaced it about 8 months before the rest of the pack.] Likely the 110v charging wasn't providing enough amps, even though I'd charge monthly using 240 volts for equalization charging. Later on, I got a 240 volt outlet installed near where I park and have since been using the Zivan NG3 to charge the truck daily. With the new pack I may drive 2 or even 3 days at a time before recharging with the Zivan. > 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. It was 4224.75 kWh actually. I am measuring my kWh per mile "from the wall" including charger/equalization losses, and I average around 700-850 Wh/mile. [My 4224.75 includes float charging for a week here and there, equalization charging, etc...] I expect that an S10 should get 300-350 Wh/mile "from the batteries" but mine has big knobby tires (not LRR at all). I am primarily using a Zivan NG3 charger which probably uses extra electricity (and may "cook" lead acid batteries a bit more than they should be...). So I don't know if I have too many parasitic losses from rolling resistance (it seems to roll OK) or just from lots of charging losses. Jay -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlKTgscACgkQSWJjSgPNbM/GLwCbBKzn8jfSGRrUflP/pTuLz1qq Xs0AnAgOZcvNxwHLwN27XTMpUwBJf2cM =37V0 -----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)