Discharge lamp, 117
Distillation, 158
Donor, 47, 50, 56, 83, 87, 385
Drude model, 179
Drude, Paul, 179
Duty cycle, 288
Ecliptic, 417
Ecology, 357–359
carbon footprint, 357
energy payback time, 357–359
energy yield ratio, 357
life cycle assessment, 357
pollution, 359
Economy, 351–356
direct consumption, 354
feed-in tariff, 152, 353
grid parity, 355–356
installed PV, 13–16
learning curve, 16
levelized cost of electricity, 354–355
net metering, 352
payback time, 351–352
self consumption, 353–354
socket parity, 355–356
Efficacy
recombination, 73
Efficiency
battery, see Battery, efficiency