battery calculations

[mjvesq1969]

can anyone give me a simple calculation (not an app) for calculating what size battery i require, taking in quiescent, in alarm and time of back up needed...ta

[al-yeti]

Do you know ohms law?

 

Do you have the current consum for each device to start with

[PeterJames]

[al-yeti]

  On 26/02/2018 at 20:13, PeterJames said:

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You rely on that for large systems ?

[PeterJames]

  On 26/02/2018 at 21:15, al-yeti said:

You rely on that for large systems ?

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Its accepted by NSI 

[al-yeti]

  On 26/02/2018 at 21:23, PeterJames said:

Its accepted by NSI 

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Come on man , you know what I mean , do you go by that strictly or use own methods as well 

 

Or got a Chinese calculator ?

[PeterJames]

  On 26/02/2018 at 21:36, al-yeti said:

Come on man , you know what I mean , do you go by that strictly or use own methods as well 

 

Or got a Chinese calculator ?

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It doesnt need to be an exact science, who has powercuts in this country nowadays?

[al-yeti]

  On 26/02/2018 at 22:07, PeterJames said:

It doesnt need to be an exact science, who has powercuts in this country nowadays?

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Moderators lounge? 

[sixwheeledbeast]

  On 26/02/2018 at 14:00, mjvesq1969 said:

calculating what size battery i require, taking in quiescent, in alarm and time of back up needed...ta

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So the logical first question is:-

Do you know how to measure the quiescent, alarm and what standby time is required for your system?

Garbage in, garbage out...

[mjvesq1969]

yes mate.

just looking for an easy calc really