On Mar 25, 2020, at 6:09 PM, Lee Damon <[email protected]> wrote:
>
> I have no experience with Tripp Lite UPSs and the reviews I've found online
> are scant and fairly mixed so I thought I'd ask here...
It's always hard to get a good read on whether a particular UPS brand is
problematic, or if there is more noise on the lists because people are trying
to make something work. And then there's the subtle differences under the hood.
If I can generalize a bit, I'd say the USB Tripp Lite UPSes we've seen over the
past 15 years fall into one of three categories:
* "HID" but not PDC HID (Power Device Class): solid hardware, proprietary
protocol (basically the proprietary Tripp Lite serial protocol converted to USB
HID reports); some models don't provide all the stats people want.
* PDC HID, but problems at the USB physical layer and/or the OS HCI layer.
SMART1500LCDT falls into this category. I think this whole series ("protocol
3016") is problematic, but these USB symptoms seem to be confined to this
series.
* Other members of the PDC HID product lines, which just seem to quietly work
(and which have been tested against NUT in Tripp Lite's labs, as David alluded
to earlier).
Either Eric or David from Tripp Lite mentioned that they are not selling the
models with proprietary protocols anymore. We won't know if there is another
problematic piece of hardware like protocol 3016 until people try it (and it
sometimes depends on the hardware on the host side - for 3016, pre-USB3
controllers had better luck than USB3 controllers, even on non-superspeed
ports).
David mentioned your model is likely protocol 4004. Here are other
compatibility reports with that protocol ID:
* https://networkupstools.org/ddl/Tripp_Lite/SU1000RTXL2UA.html
* https://networkupstools.org/ddl/Tripp_Lite/SU1500RTXL2UA.html
* https://networkupstools.org/ddl/Tripp_Lite/SU1500RTXLCD2U.html
* https://networkupstools.org/ddl/Tripp_Lite/SU1000XLA.html
* https://networkupstools.org/ddl/Tripp_Lite/SU2200XLA.html
Seems like a good choice to me, based on the available information. Of those,
the 1500s seem to have the most recent information (NUT 2.6.3).
(Past performance is not a guarantee of future returns, IANAL, I don't speak
for my employer, I don't work for an UPS manufacturer or reseller, I don't own
any Tripp Lite stock, something about staying at a Holiday Inn, etc.)
--
- Charles Lepple
https://ghz.cc/charles/
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