Name Thermopile
Source Mod RedPower 2
ID Name Unknown
Type Block
Stackable Yes (64)
Solid Yes
Transparent No
Affected by Gravity No
Emits Light No
Flammable No
Required Tool Unknown

A Thermopile is a RedPower 2 machine used for generating blutricity. Although it doesn't need light, unlike solar panels, it doesn't produce nearly as much power.


GUI Crafting Table.png
Copper Ingot  (RedPower 2)
Iron Ingot
Copper Ingot (RedPower 2)
Blue-Doped Wafer
Blue Alloy Ingot
Blue-Doped Wafer
Copper Ingot  (RedPower 2)
Iron Ingot
Copper Ingot (RedPower 2)

Power Output Details[edit]

To calculate the power output of a thermopile, one must first count the number of "hot" and "cold" blocks on each of its faces.

Heat and Cold Tables[edit]

Block Heat
Lava 100
Fire 25
Torch 5
Jack 'o' Lantern 3
Air (Nether) 1
Block Cold
Snow (Block) 100
Ice 100
Snow (Covering) 50
Water 25
Air (Normal) 1

Additional Effects[edit]

If there's at least 100 heat and 200 cold, every second there is a 1 in 300 chance for adjacent lava source and flowing lava blocks to turn into obsidian or Basalt, respectively.

Additionally, if there is at least 100 heat, every second there is a 1 in 300 chance for adjacent snow (block or covering) or ice blocks to melt.

Note that these effects only occur if the energy generated by the thermopile is being delivered to a machine/battery box.

Power Output[edit]

A thermopile will produce 0.005*min(heat, cold) amps, or 0.3*min(heat,cold) watts.

Suggested Designs[edit]

Type 1[edit]

As thermopiles require maintenance with 100 heat or more if the design includes snow or ice, and the next best cooling block is water, it is suggested that one surrounds a vertical stack of thermopiles with 3 water and 1 lava. This produces 0.005*min(100, 3*25) = 0.375, amps per thermopile, or 22.5 Watts. Note that a solar panel produces 120 watts (2 amps x 60 Volts), by comparison.

Type 2[edit]

A slightly more improved version uses 1 ice block, 2 lava, and 2 water with the remaining face for wiring. Placing a Xychorium Ice block adjacent to the ice block prevents the ice from melting. This setup produces 0.005*min(200, 150) = 0.75 amps per thermopile. However, the setup requires 5 faces, increasing the space requirement. Note that using 2 ice blocks would turn the lava to obsidian.

Type 3[edit]

A max output version with a little automation can produce 0.005*min(2*100, 2*100) = 1 amp per thermopile. It uses 2 ice blocks supported with Xychorium Ice and 2 flowing lava blocks supported with block breakers. This video explains how to make a tile-able max-output thermopile.