Quick Answer: The Thermal Generator is a Peltier/Seebeck element on a large heat sink that either produces a voltage from a temperature difference across its faces or creates a temperature gradient when a voltage is applied.
Last updated: October 2026
Key Features
Peltier/Seebeck element mounted on a large heat sink
As a Seebeck element, produces a voltage when one face is warmed and the other cooled
As a Peltier element, produces a temperature gradient when a voltage is applied
Positive voltage on the red terminal makes the top surface cool and the bottom hot
A beaker of boiling water on top produces a voltage large enough to operate the Solar Motor
Technical Specifications
Specification
Value
Element dimensions
30 mm x 30 mm x 4.7 mm
Maximum voltage
8V d.c.
Maximum current
3.5A
Maximum working temperature
70-80°C
Maximum cooling performance
17W
Maximum temperature difference
67°C between faces
Internal resistance
1R8 Ohm
About This Product
Used one way, the element works as a Seebeck generator, turning a temperature difference between its faces into a voltage. Used the other way, as a Peltier element, it pumps heat: with a positive voltage on the red terminal the top surface becomes cool and the bottom hot, and the heat sink removes this heat.
Frequently Asked Questions
Q1. How can the generator run a motor? Sitting a beaker of boiling water on top of the element produces a voltage large enough to operate the Solar Motor.
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