Thermoelectric Generator Impedance Matching

Question

I have a TEG that has an output IxV curve like this:

That should mean something like this:

I need a simple circuit to regulate the voltage around 12 V while enabling at least ~10 W for some load I have (0,833 A)

My idea was to use a simple zener diode, a capacitor and a voltage regulator for the 12 V output

What do you think? for R1 I thought about 5-30 ohm, for Zn1 30 Vbkd and C1 ~ 0,00001 F.

Do you have any comments about the layout or values?

Thanks in advance!

Answer 1

Get rid of R1, it wastes power.

Get rid of the 7812, it wastes power.

Get rid of ZN1, it may waste power.

Replace the regulator with a switching 12 V output regulator.