Hi there,

Trying to figure out my power consumption of servers with respect of installing a new AC unit and potentially adding a battery pack on UPS. By no means do I consider myself an electrician so I would value your input.

I am basing my calculations of this article where in essense the formula is: Equipment BTU = Total wattage for all equipment x 3.5

Q: Is it safe to assume that if a server has dual power supply to double the wattage used?

After digging through some dell docs and random sites I gathered the following info and I am not *sure *if this is correct assumption:

Dual Power Supply | Wattage | Total Wattage | |

PowerEdge 850 | no | 345 | 345 |

PowerEdge 1550 | no | 240 | 240 |

PowerEdge 1750 | yes | 320 | 640 |

PowerEdge 1750 | yes | 320 | 640 |

PowerEdge 1850 | yes | 550 | 1100 |

PowerEdge 1850 | yes | 550 | 1100 |

PowerEdge 1850 | no | 550 | 550 |

PowerEdge 1950 | yes | 670 | 1340 |

PowerEdge 2850 | yes | 700 | 1400 |

PowerEdge 2900 | yes | 930 | 1860 |

Grand Total Wattage: |
9215 |
||

Total BTU needed: |
32252.5 |

1 Ton of cooling = 12K BTUs roughly needing a **2.6 Ton AC unit**.

Does this sounds right? Your thoughts?

Granted I am not including the room size etc. but I just wanted to make sure that I am calculating the consumption of servers correctly. I have also read that these are just starting numbers and that number of disks in raid and memory sticks in server will draw more power...something as adding 10W per per disk/memory stick...is this true??

Thanks for your time!