Fascinating to learn why UPS batteries die so quickly! The specs for the Soleil 48V charger I have — http://www.batterystuff.com/battery-chargers/48-volt/multi-volt-input/SON4812SR.html— fit the published recommendations for the Deka AGMs, as long as the pack stays balanced: 14.4*4=57.6 max voltage (58.32 max spec), 13.7*4=54.8 float voltage (55.2 max spec).
I'm not doing any pickoffs at all precisely to stay balanced; if I want 12V I have a HV buck converter that can supply 12V and I'll pick it off the 48V supply. It looks like the group 31 Deka might also fit mechanically (need to measure some more), giving me more DOD headroom by their specs. The peukert exponents calculated for their group 31 is also lower than their group 27 or 24 AGMs. I don't know why. I'll start mowing my front and back yards separately; that's about 1/6 acre each. Then I can measure SOC and see how much room I have. Given that some similar conversions can mow 1/3 acre on four group 24 marine deep cycle batteries, it really seems that I ought to be able to do my half lawns within 50% DOD. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140102/697e4498/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)
