Abstract: A thermoelectric generator includes a tapered inlet manifold including first and second non-parallel sides; first and second pluralities of outlet manifolds; and thermoelectric generating units (TGUs) each including a hot-side heat exchanger (HHX) with inlet and outlet; a cold-side heat exchanger (CHX); and thermoelectric devices arranged between the HHX and CHX. The inlets of some of the HHXs receive exhaust gas from the first side of the tapered inlet manifold and the outlets of those HHXs are coupled to outlet manifolds of the first plurality of outlet manifolds. The inlets of other of the HHXs receive exhaust gas from the second side of the tapered inlet manifold and the outlets of those HHXs are coupled to outlet manifolds of the second plurality of outlet manifolds. The thermoelectric devices can generate electricity responsive to a temperature differential between the exhaust gas and the CHXs.