The Thermal Plant is a generator crafted with the Habitat Builder that converts nearby high temperatures (>25°C) into Energy.
The Thermal Plant can produce limitless power for Seabases given time and proximity to heat. On the Thermal Plant is a screen that displays the temperature of the surrounding area (rounded to whole degrees). The energy output per minute is linear and can be calculated with °C*1.3233: so zero at 25°C, 33 at 50°C, 66 at 75°C, 77.88 at 84°C and at 104°C the energy output is 104. One Thermal Plant can store up to 250 energy at a time.
Lava Geysers are optimal spots to place Thermal Plants. Near the center of the geyser, temperatures can reach well over 50°C, meaning that a wellplaced plant can produce power rapidly and around the clock. The eruptions cannot damage the plant, but be careful placing them as the heat can kill you. Given that Thermal Plants have to be built outside a seabase and need to be close to a heat source, it may be necessary to use Power Transmitters to connect the Thermal Plant to a seabase.
When placing with the Habitat Builder, the Thermal Plant can be shown in three different colors. Red means it cannot be placed. Yellow indicates it can be built in that location, but the surrounding area is too cold and the Thermal Plant will not generate power. Green signifies the plant can be placed, and will generate power.
Energy Collection Rate
The table below contains the results of testing Thermal Plant collection rates. Please note that these are approximate results, and not exact (Temperature can vary slightly since the player can only see it to the nearest whole number).
Temperature °C  Energy per Minute  Energy per Second  Time to Collect
1 Unit of Energy  Time to Collect
25 Units of Energy 

25  0  0  N/A  N/A 
26  1.3  0.02  45.5 Seconds  1136.4 Seconds 
27  2.6  0.04  22.7 Seconds  568.2 Seconds 
28  4.0  0.07  15.2 Seconds  378.8 Seconds 
29  5.3  0.09  11.4 Seconds  284.1 Seconds 
30  6.6  0.11  9.1 Seconds  227.3 Seconds 
31  7.9  0.13  7.6 Seconds  189.4 Seconds 
32  9.2  0.15  6.5 Seconds  162.3 Seconds 
33  10.6  0.18  5.7 Seconds  142.0 Seconds 
34  11.9  0.20  5.1 Seconds  126.3 Seconds 
35  13.2  0.22  4.5 Seconds  113.6 Seconds 
36  14.5  0.24  4.1 Seconds  103.3 Seconds 
37  15.8  0.26  3.8 Seconds  94.7 Seconds 
38  17.2  0.29  3.5 Seconds  87.4 Seconds 
39  18.5  0.31  3.2 Seconds  81.2 Seconds 
40  19.8  0.33  3.0 Seconds  75.8 Seconds 
41  21.1  0.35  2.8 Seconds  71.0 Seconds 
42  22.4  0.37  2.7 Seconds  66.8 Seconds 
43  23.8  0.40  2.5 Seconds  63.1 Seconds 
44  25.1  0.42  2.4 Seconds  59.8 Seconds 
45  26.4  0.44  2.3 Seconds  56.8 Seconds 
46  27.7  0.46  2.2 Seconds  54.1 Seconds 
47  29.0  0.48  2.1 Seconds  51.7 Seconds 
48  30.4  0.51  2.0 Seconds  49.4 Seconds 
49  31.7  0.53  1.9 Seconds  47.3 Seconds 
50  33.0  0.55  1.8 Seconds  45.5 Seconds 
51  34.3  0.57  1.7 Seconds  43.7 Seconds 
52  35.6  0.59  1.7 Seconds  42.1 Seconds 
53  37.0  0.62  1.6 Seconds  40.6 Seconds 
54  38.3  0.64  1.6 Seconds  39.2 Seconds 
55  39.6  0.66  1.5 Seconds  37.9 Seconds 
56  40.9  0.68  1.5 Seconds  36.7 Seconds 
57  42.2  0.70  1.4 Seconds  35.5 Seconds 
58  43.6  0.73  1.4 Seconds  34.4 Seconds 
59  44.9  0.75  1.3 Seconds  33.4 Seconds 
60  46.2  0.77  1.3 Seconds  32.5 Seconds 
61  47.5  0.79  1.3 Seconds  31.6 Seconds 
62  48.8  0.81  1.2 Seconds  30.7 Seconds 
63  50.2  0.84  1.2 Seconds  29.9 Seconds 
64  51.5  0.86  1.2 Seconds  29.1 Seconds 
65  52.8  0.88  1.1 Seconds  28.4 Seconds 
66  54.1  0.90  1.1 Seconds  27.7 Seconds 
67  55.4  0.92  1.1 Seconds  27.1 Seconds 
68  56.8  0.95  1.1 Seconds  26.4 Seconds 
69  58.1  0.97  1.0 Seconds  25.8 Seconds 
70  59.4  0.99  1.0 Seconds  25.3 Seconds 
71  60.7  1.01  1.0 Seconds  24.7 Seconds 
72  62.0  1.03  1.0 Seconds  24.2 Seconds 
73  63.4  1.06  0.9 Seconds  23.7 Seconds 
74  64.7  1.08  0.9 Seconds  23.2 Seconds 
75  66.0  1.10  0.9 Seconds  22.7 Seconds 
76  67.3  1.12  0.9 Seconds  22.3 Seconds 
77  68.6  1.14  0.9 Seconds  21.9 Seconds 
78  70.0  1.17  0.9 Seconds  21.4 Seconds 
79  71.3  1.19  0.8 Seconds  21.0 Seconds 
80  72.6  1.21  0.8 Seconds  20.7 Seconds 
81  73.9  1.23  0.8 Seconds  20.3 Seconds 
82  75.2  1.25  0.8 Seconds  19.9 Seconds 
83  76.6  1.28  0.8 Seconds  19.6 Seconds 
84  77.9  1.30  0.8 Seconds  19.3 Seconds 
85  79.2  1.32  0.8 Seconds 
18.9 Seconds 
The formula for energy per minute is °C*1.3233, so each °C gives 0.32 more energy per minute.
Recipe
Data Bank Entry
The first rule of survival in hostile environments is to work with the resources available. If it's 800 degrees outside and you're in danger of burning to death at any moment you may as well get some cheap, reliable energy out of it.
'The Thermal Power Plant: It's hot'. 
Gallery
