Fitting a DC UPS



  • Following on from a couple of other threads that I started about using a UPS, I finally got this done and it works like a charm. Many thanks to @samlogan87 for pointing me in the direction of DC UPSs.

    https://somei3deas.wordpress.com/2019/10/22/fitting-a-dc-uninterruptible-power-supply-ups-and-separate-5v-supply/



  • An excellent post with a lot of essential details. Thanks for sharing!

    What's the costs for this system?



  • @nhof said in Fitting a DC UPS:

    An excellent post with a lot of essential details. Thanks for sharing!

    What's the costs for this system?

    It is a long post so I'll forgive you for not seeing the cost ☺. The UPS unit cost me £47.80 and the batteries I chose cost me £69.90. I did spend a lot more than that because I undated a lot of other things at the same time. I could have used smaller capacity batteries for my printer, in that configuration. On the other hand, if one had a DC powered bed heater, one would likely need to spend more on bigger batteries. It just depends on what the power consumption is and what the desired run time is.



  • Hi,

    I didn't see any mention of runtime versus load for the item you posted a link to.

    Do you have that information?

    Thanks.

    Frederick



  • @fcwilt said in Fitting a DC UPS:

    Hi,

    I didn't see any mention of runtime versus load for the item you posted a link to.

    Do you have that information?

    Thanks.

    Frederick

    The runtime vs load will depend entirely on what batteries you decide to pair it with. I chose a pair of 12V 20AH but I don't think there is any reason why you couldn't use a pair of say 200AH. The printer would likely run for a week on batteries if you did that (and take another week to recharge them) ☺


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