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EV1 Energy Use Plots


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Below is a plot of our monthly electricity costs. Our charger is connected to a separate TOU (time-of-use) meter which gives us discounted electricity between 9PM and noon the next day (off-peak hours). Each billing is broken up into on-peak charging cost, off-peak charging cost, and miscellaneous charges (taxes, meter cost, etc.). The plot starts in March 1997 even though we got our car in December 1996 because of bureaucratic confusion and red tape.

Click on the graph to get a full-size view.

Below is a plot of our energy use in KWH/month. On-peak and off-peak portions are shown in different colors.

Click on the graph to get a full-size view.


Copyright 1997-1999 by Dave & Jean Kodama Email: kodama@alumni.caltech.edu