The 1238-6501 uses 48 to 80 volts DC (nominal). The voltage of the pack will likely be a bit higher than the nominal rating. As an example, a 48 volt (nominal) lead acid pack might have a fully charged resting voltage around 52.5 volts, and similar 72 volt pack would have a resting voltage just under 80 volts. If someone made up an 80 volt pack, the resting voltage would be about 88 volts or so.
That being said, what is more important is the highest voltage expected on the system. This will happen when the battery pack is being charged. The maximum voltage on a 72 volt pack while finishing a charge is about 92 to 96 volts, or about 100 to 104 volts on an 80 volt lead acid system. These are approximate numbers. (finishing/equalizing voltage varies by battery manufacturer, and occasionally by charger programming facility). The highest potential charging voltage for an 80 volt nominal system is close to the 108 volt number you have - I would consider that to be an absolute maximum voltage that is encountered on rare occasions. Anything higher than an '80 volt' pack risks popping this controller. Staying with 72 volts max (nominal) will give you a good safety margin and longer controller life. Tom Keenan > On Feb 20, 2017, at 10:17 AM, m gol via EV <[email protected]> wrote: > > Hello > > What is the maximum voltage of a Curtis 1238-6501 controller? > > EVWest is telling me 75 volts, but I have heard 108volts? > > Thanks > > Michael _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
