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UPS sizing and battery backup sizing

Not sure if I chose the correct topic.

Can anyone help with a step-by-step process and formulae to determine what size UPS to purchase and what size battery is required depending on the standby hours required?

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July 30, 2019 14:16

Nice Article
Thanks for sharing this article. This article is about the UPS sizing and backup increasing possibility.
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May 14, 2019 07:28

Hi Trevor, first there is the question what you want to achieve as this will dictate the choice of type, i.e. how it behaves with loss of mains power. There is a brief description here: https://uk.rs-online.com/web/c/power-supplies-transformers/uninterruptible-power-supplies-ups/ups-uninterruptible-power-supplies/?searchTerm=UPS click 'read more'.
Then there is the question of what is being powered, is it a constant load or a fluctuating load such as a computer?
Manufacturers often give data for the uptime at a percentage of rated load, use the filter tool of the above link for backup time and rated load in VA and then check the manufacturers' data for the most accurate data.

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