Thermoelectric Generator on a Stove or Campfire
Heat in, electricity out — a stove-top fan or camp stove generator can charge a phone while you cook.
Question 1
The goal
Charge a phone or run an LED from heat you're already using for cooking or warmth.
Question 2
Materials
- Commercial thermoelectric camp stove or stove-top TEG module with USB
- Wood stove or campfire (outdoors) / wood stove (indoors with chimney)
- Heat-resistant gloves
- USB cable
Question 3
Substitutes
- DIY Peltier module + heat sink + water pot (experimental)
- Stove fan (heat-powered, moves air only)
Where to find it
| Material | Household | Wilderness | Urban / scavenged |
|---|---|---|---|
| TEG module | Stove fan shop | Camping store (TEG stove) | Online electronics |
| Heat source | Vented wood stove | Campfire | Outdoor fire pit |
Question 4
Step by step
- 1
Use only on a properly vented wood stove or outdoors — never with a charcoal grill or camp stove indoors (carbon monoxide).
- 2
Place the hot side of the module on the stove surface or follow the camp stove's setup.
- 3
Make sure the cold side has its heat sink, fan or water pot — the generator needs a big temperature difference.
- 4
Wait until the stove is hot (typically 5–10 minutes). The USB indicator lights when power is available.
- 5
Plug in the phone in airplane mode.
- 6
Expect about 2–5 W — a phone charge takes 2–4 hours.
- 7
Keep cables away from hot surfaces.
- 8
Shut down per manufacturer instructions; let it cool before packing.
Saved steps go to My Survival Notebook.
Question 5
The science
The Seebeck effect: a temperature difference across two different semiconductors pushes electrons from hot to cold, creating a voltage. Efficiency is only ~5%, so most heat still warms the room or pot.
Question 6
Dangers & limits
- Burns — module and stove are very hot.
- Overheating destroys modules; follow max temperature ratings.
- CO: fires and stoves indoors need a chimney and a CO alarm.
Question 7
How you know it worked
Phone gains charge while the stove runs safely.