Square inches aren't really fungible; my constraints are certain rectangles. And because I need one battery to be at least in part under the seat, I have a height limitation. The golf cart batteries are taller. Group 27 will just fit.
I already went with the ME1004 so I'm pretty much committed to a 48V system for the soon-upcoming lawn mowing season; too late to start over. I've seen at least one report that 36V isn't sufficient for running a tractor with lawnmower with the ME1004, and I have a 48V charger anyway. If I can't mow the whole lawn in one session, I can do front and back yards on separate days. And if I have this working, I'll have leisure to convert something better at a relaxed pace later, if I decide I want to. ☺ Thanks for pointing me back to AGM for heavier load tolerance, and to the poster who mentioned Deka. I hadn't seen the Deka AGM group 27 batteries before. Lithium looks like it would be about $3K for cells alone, not counting BMS or lithium charger. Looks like 4 Deka AGM Group 27s would be about $1K. AGM would allow me to alter orientation so I could be more flexible about placement. I imagine the AGMs will last at least 400 cycles, which the Deka AGM is rated for at relatively deep discharge. I expect a max of 40 full lawn mowing sessions per year, so depending on whether I have to take one or two charge cycles per full lawn mowing, that's 5-10 years, conservatively. I'll accept that. Do I correctly understand that the SOC voltage levels for AGM and flooded PbA batteries are the same, since the fundamental chemistry is the same? And, responding to other posts... The trailer idea won't work for me, on my lot, because I need to use a bagger sometimes (particularly when cleaning up in the fall due to all the oak trees I have), and because I have to back up with tight tolerances and a short-coupled trailer would jack-knife too easily even if I weren't bagging... -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140102/6f8b558c/attachment.htm> _______________________________________________ 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)
