of fig1 in fig3 the thermoelectric generator device again is concentric with metal as steel can 416 with condenser surface 434 surrounding corrugated ceramic electrolyte 412 made of beta alumina which in turn surrounds molten alkali metal 410 and heat pipe 414 in this embodiment the condenser surface 434 is a material as copper electroplate that aids in wetting by the condensing alkali metal as sodium the sodium wetted surface serves to reflect radiant energy from the colder toward the hotter region comprising corrugated electrolyte with electrode thereon molten alkali metal as sodium 410 is heated by heat pipe 414 and travels in ionic form through ceramic electrolyte 412 where it recombines with electrons at porous electrode 422 and evaporates into evacuated zone 424 and collects on cooler condenser surface 434 of metal can 416 the alkali metal drains down condenser surface 434 and is collected at the bottom region of the device whereupon it is pumped through conduit 450 by pump 408 which may be electromagnetic or other pumping means whereupon it is heated again to temperatures of at least about 600 u00b0 c or higher as about 800 u00b0 1200 u00b0 c by heat pipe 414 negative lead 420 makes electrical contact with metal can 416 and conducts from the device electrons released by ionization of alkali metal in fig4 positive output lead 428 insulated by insulator 432 serves to conduct electrons from the external circuit to the porous electrode 422 via buss strap 462 and buss straps 460 and 464 similarly see fig3 supplemental buss wire 466 and buss wires 468 fig4 and 5 show.