The results illustrated in Fig. 10 show that at low flow rates below 3.2 [L/min/ch] the optimal panel density has an approximately constant value of 90 Panels/m as the maximum net thermoelectric power increases in an inverted parabolic manner. Conversely, beyond the flow rate of 3.2 [L/min/ch] the maximum net power remains between 35 and 40 Watts whilst the optimal panel density decreases at a near linear rate with a slope of approximately 50. The decrease in optimal panel density is attributed to the adverse pressure drop brought upon by the panel’s flow impedance. Therefore, at higher flow rates, fewer panels produce greater net thermoelectric power. Beyond 5 [L/min/ch], it is shown that the thermal enhancement and power enhancement of the panel inserts does not offset the pumping penalty associated with the presence of the flow impeding inserts and that maximum net thermoelectric power is attained with channel flow free of flow impeding inserts.