[time-nuts] Re: Help needed with a UPS for my GPSDO

[Dr. David Kirkby]

On Mon, 26 Jun 2023 at 19:23, Dave via time-nuts <time-nuts at lists.febo.com>
wrote:

> Hi, I managed to find two second hand UPS at a ham rally but neither had
> a battery pack in it
>
> One, an "APC backups-ups 400"  works well with a single 12V 7Ah sealed
> lead acid battery.
>
> The other, an "APC SMART-UPS 600" seems to have space for two batteries.
>
> I have found a manual for the "600" unit but it mentions nothing about
> the number of batteries or if they should be connected in series or
> parallel :-(
>
> Has anyone any experience of these ??
>
> Any help more than welcome.
>
> Regards,
> Dave
>

These guys are extremely knowledgeable about UPSs.

https://secure.ups-trader.co.uk/

For the UK at least, their battery prices are next to impossible to beat.

I would have thought if a UPS has space for two batteries, they would be in
series to give 24 V. My APC 650 VA one does. But I would ask ups-trader.
I'm sure they would give you a quote for batteries, but unless you are in
the UK, I expect carriage would make them uneconomic.


Dave