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|  | {{Languages}}
 |  | ''Duplicate content: [[Power production#How many pumps and burners are needed.3F|How many pumps and burners are needed?]]'' | 
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|  | This is about how many [[Boiler]]s, [[Pump]]s, [[Steam engine]]s and also ratios of [[Solar panel]] and [[Basic accumulator]] (and more).
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|  | == Hot liquids ==
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|  | === Steam engines, pumps and boilers ===
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|  | {| class="wikitable"
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|  | |+ Needed number of entities in different situations 
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|  | ! Situation !! # of steam engines !! # of boilers !! # offshore pumps !! Comment
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|  | | One steam engine || '''1''' || 2 || 1 || Could be used in very niche situations
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|  | | One off-shore pump || 10 || 14 || '''1'''|| A very popular and widely-used setup
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|  | | Full throughput of a pipe || max. 21 || max. 28 || 3 || Total throughput depends on the length of the pipe
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|  | |}
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|  | Each steam engine needs roughly 1.31 boilers when running at full capacity.
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|  | One [[Pump|offshore pump]] can satisfy 14 [[Boiler]]s and 10 [[Steam engine|steam engines]]. 13 boilers will make the job also, but this tends to have problems to raise the temp after coal shortness or other accidents ([[Biter]]s love to attack the boilers).
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|  | To fully satisfy a pipe you need 3 [[Pump]]s or 5 [[Small pump]]s (or better 6, but that depends on pressure!). But with this setup you will find, that the length of your pipe-setup will influence this too much. This is definitely not a beginner strategy.
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|  | ==== See also ====
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|  | * [http://www.factorioforums.com/forum/viewtopic.php?f=8&t=5950 Research topic about energy]
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|  | * [[Liquids/Hot|Hot Liquids]]
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|  | * [[Liquids/Pipe physics]].
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|  | === Hot liquids in tanks ===
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|  | To equalize the needed throughput (different needs of energy between day and night for example), hot water from boilers can also be stored in [[Storage Tank|storage tanks]] and used by extra steam engines during peak times or during night (if solar is in place). This energy storage technique can be used instead of or in addition to [[Basic accumulator|accumulators]].
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|  | See [[Liquids/Hot#Storing_hot_liquids_as_energy_storage|about storing of hot liquids]] how to use that.
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|  | == Solar Panels/Accumulators ==
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|  | === Optimal ratio ===
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|  | The optimal ratio is 0.84 (21:25) accumulators per solar panel, and23.8 solar panels per megawatt required by your factory (this ratio accounts for solar panels neededto charge the accumulators).
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|  | A "close enough" ratio is 20:24:1 accumulators to solar panels to megawatts required (for example, a factory requiring 10 MW can be approximately entirely powered, day and night, by 200 accumulators and 240 solar panels - this approximation differs from optimal only in that it calls for 2 extra solar panels, which is negligible).
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|  | This is taken from [http://www.factorioforums.com/forum/viewtopic.php?f=5&t=5594 Accumulator / Solar Panel Ratio] (which calculates this in an impressive mathematical way!) and[https://forums.factorio.com/viewtopic.php?p=143317#p143317 another post in that thread] (which calculates the solar panel to megawatt ratio in a much less impressive way).
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|  | There arealso these related older threads:
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|  | * http://www.factorioforums.com/forum/viewtopic.php?f=5&t=5168
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|  | * http://www.factorioforums.com/forum/viewtopic.php?f=18&t=5394
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|  | * http://www.factorioforums.com/forum/viewtopic.php?f=5&t=7619
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|  |   |  | 
|  | === Perfect placing ===
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|  | * [http://www.factorioforums.com/forum/viewtopic.php?f=8&t=1865 Big Solar Farm]: About the perfect placing of panels
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|  | * [https://forums.factorio.com/viewtopic.php?p=124780#p124780 9x9 Blueprint]: A suggestion for a repeatable tile with a 5:6 accumulator to solar panel ratio that happens to coincide with the 20:24 "close enough" ratio above (4 of these tiles can provide 1 MW of continuous power).
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