On my opinion.. No, it is not your controller; your batteries are the problem.
Lead-acid batteries can not provide big ammount of power for long periods of time (acceleration) due to a big 'Peukert effect' and especially when they are low on SOC, at a high current request it must be creating your whole pack voltage to drop below the minimum 1221C voltage threshold creating that abrupt loss of power. If you decrease the amount of current requested, then no voltage drop will occur and you will be able to continue for a little bit more. But you will then take your pack to very low SOC that will only make if worst. To confirm this, just hook up a volt meter when driving, make a WOT and see the voltage sag at full SOC and then after 50% like you mentioned, If the batteries are the problem; you will see a big difference in between. Most probably your pack has lost 50 or 60% of its original capacity and either you must re-adjust your e-meter to match actual capacity or check your pack for bad batteries or new pack. Hope this helps. Marco Gaxiola On Sun, Apr 7, 2019 at 5:29 PM hazemsedra via EV <[email protected]> wrote: > This forum has been great for helping me out since 2009. > My Ford Escort(108 volts Deep cycle, Curtis 1221C controller) at times > stalls on me, > loss of power when i press the pot. The problem seems to occur most when I > have used more than 50% of my battery charge. When the batteries are fully > charged, no problems the first 20 or so miles. > I don't lose complete power but when I am low on juice and I try to > accelerate, the loss of power occurs. > Is it my controller? Any advise that I can give to my mechanic who has > basically kept me going these last 9 years. > Thanks > Hazem > > -- > Sent from: http://electric-vehicle-discussion-list.413529.n4.nabble.com/ > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20190407/64aca887/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
