mechanical, 9
nuclear, 9, 17
primary, 5, 358
problem, 6
radiative, 22
renewable, 9
secondary, 5
solar, 10
specific, 297
storage, 297, 371–372, 381
thermal, see Heat
unit, 4
Energy band, 52
Entropy, 126
Epitaxy, 181, 186–187, 199
Equation of Time, 425–426
Equator, 264, 324, 381
Equivalent circuit
two diode model, 118
Equivalent sun hours (ESH), 317, 320–321
Erbium, 241
Etching, 197
anisotropic, 168
Étendue, 235
Ethene, 206
Europe, 13, 335
European Solar Radiation Atlas, 272
European Union, 310