set size .95, 1
set term png size 1000, 300
set output 'xantrex_panel_power.png'
set xdata time
set timefmt "%b %d %H:%M:%S %Y"
set title "Panel Power" 
set ylabel "DC Watts" 
set yrange [0:2000]
set xrange [*:*]
set xlabel " "
set grid
set key top left

plot 'xantrex.data' using 1:(($10 * $11)) t "Fixed Panel Power" with lines lc rgb "red", \
     'xantrex.data' using 1:(($12 * $13)) t "Tracking Panel Power" with lines lc rgb "green", \
     'xantrex.data' using 1:(($10 * $11 + $12 * $13)) t "Total Panel Power" with lines lc rgb "black"

set output 'xantrex_battery_voltage.png'
set xdata time
set timefmt "%b %d %H:%M:%S %Y"
set title "Panel and Battery Voltage" 
set ylabel "DC Volts" 
set yrange [0:90]
set xrange [*:*]
set xlabel " "
set grid
set key top left

plot     'xantrex.data' using 1:5 t "Battery Voltage" with lines lc rgb "black", \
         'xantrex.data' using 1:10 t "Fixed Panel Voltage" with lines lc rgb "red", \
         'xantrex.data' using 1:12 t "Tracking Panel Voltage" with lines lc rgb "green"

set output 'xantrex_battery_current.png'
set xdata time
set timefmt "%b %d %H:%M:%S %Y"
set title "Battery Current" 
set ylabel "DC Amps" 
set yrange [-40:40]
set xrange [*:*]
set xlabel " "
set grid
set key top left

plot     'xantrex.data' using 1:(($6 * -1)) t "Inverter Current Draw (from Battery)" with lines lc rgb "black"

set output 'xantrex_ac_amps.png'
set xdata time
set timefmt "%b %d %H:%M:%S %Y"
set title "Household Current (excluding garage, measured by Xantrex XW-6048 Inverter)" 
set ylabel "AC Amps" 
set yrange [*:*]
set xrange [*:*]
set xlabel " "
set grid
set key top left

plot 'xantrex.data' using 1:((-$7)) t "Utility Input" with lines,  \
     'xantrex.data' using 1:9 t "Household demand" with lines lc rgb "black"