[Nut-upsuser] Powercool UPS compatibility

James Billinge jammybisme at hotmail.com
Thu Apr 8 06:44:37 BST 2021

Hi Jim

Thanks for the reply.

In NUT under unRAID there is indeed a setting to enter a driver in.

Which driver are you suggesting I try as nutdrv_qx makes NUT work, but no communication between NUT and the UPS.

Just tried nutdrv_atcl_usb.c as driver and NUT will not start.

Is there anything else I need to enter in UPS.conf to get it to work?



Sent from my iPhone

On 8 Apr 2021, at 02:22, Jim Klimov <jimklimov at gmail.com> wrote:

I believe nutdrv_atcl_usb is orthogonal to nutdrv_qx "fuji" subdriver. They both handle devices using an "ATCL" USB chip which does not have a registered vendorId/productId, but that is where similarity stops. Different UPS vendors implemented different protocols and abilities using that chip as a transport, hence two unrelated drivers.

It seems the HCL entry appeared in relation to this discussion: https://github.com/networkupstools/nut/issues/203

Looking at https://github.com/networkupstools/nut/blob/master/drivers/nutdrv_atcl_usb.c it indeed does not have many settings, just an alternate "vendor" string to match on a device which it finds with hardcoded vid:pid by looking at all USB devices.

Unfortunately I can't help with setup of unRAID bit. I'd assume there is a place to state which NUT driver you want.


On Tue, Apr 6, 2021, 22:12 James Billinge via Nut-upsuser <nut-upsuser at alioth-lists.debian.net<mailto:nut-upsuser at alioth-lists.debian.net>> wrote:
I have spent the last few days researching the possibility of using a Powercool UPS with NUT under unRAID.

I have posted my findings on their forums and not had much response besides other users wanting it to work too.


How does one utilise nutdrv_actl_usb?


As a means of connecting to a Powercool UPS along with nutdrv_qx?

Seeing this - https://github.com/cbedgar/nut/blob/1e9216399b890b0770a0e8b158109eaa5e61d332/data/driver.list.in

Fills me with hope that it’s feasible.

Is it feasible or am I wasting my time?

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