Solarian Biosphere Kitchen has no upgrade path — it is built once, at this level.

Sol Central's biosphere produces actual food — hydroponically grown vegetables, vat-cultured proteins, and spices from the last surviving Earth seed bank. The chefs are Confederacy employees with security clearances, because apparently seasoning is classified. The vacuum-sealed rations they produce are the most sought-after luxury in the galaxy. Haven can't get enough of them.