RunTime

[leon-ITA]

Hi all, I've installed this awesome service, but I've a very simple question I guess!
My UPS tecnoware doesn't have the runtime information, I've seen into the Json message and this information is not present.
My question is: is possible force this value i.e. by using the current UPS load and the mhA of the battery? Or Let me know if you have other ideas?
Ciao

[ArthurMitchell42]

Leon, I’m not sure from your message what data your UPS does and does not send in response to the upsc daemon being queried. Maybe you could use the “raw” endpoint to download the JSON or the “view raw” option on the menu to display the debugging JSON supplied by your device and attach it as a file here. I can look though it and see what’s present. One thing I would say is that calculating runtime from a battery level is notoriously unreliable (which is why quite a few models don’t do it) Regards, A From: leon-ITA ***@***.***> Sent: 01 December 2024 16:17 To: ArthurMitchell42/nutcase ***@***.***> Cc: Subscribed ***@***.***> Subject: [ArthurMitchell42/nutcase] RunTime (Discussion #70) Hi all, I've installed this awesome service, but I've a very simple question I guess! My UPS tecnoware doesn't have the runtime information, I've seen into the Json message and this information is not present. My question is: is possible force this value i.e. by using the current UPS load and the mhA of the battery? Or Let me know if you have other ideas? Ciao — Reply to this email directly, view it on GitHub<#70>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ATTOABV6ZHL6ZYBUY42ILUD2DMY6VAVCNFSM6AAAAABSZ2PHZ6VHI2DSMVQWIX3LMV43ERDJONRXK43TNFXW4OZXGU4DSNRXGI>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.******@***.***>>

[leon-ITA]

thanks for your quick answer.
Below the raw data:

{
"nutcase_version": "NUTCase 0.4.0.2",
"server_version": "2.8.2",
"server_address": "192.168.1.253",
"server_port": 3493,
"mode": "nut",
"ups_list": [
{
"name": "tecnoware",
"description": "tecnoware",
"variables": [
{
"name": "battery.charge",
"value": "100"
},
{
"name": "battery.voltage",
"value": "13.9"
},
{
"name": "battery.voltage.high",
"value": "13.00"
},
{
"name": "battery.voltage.low",
"value": "10.40"
},
{
"name": "battery.voltage.nominal",
"value": "12.0"
},
{
"name": "device.type",
"value": "ups"
},
{
"name": "driver.debug",
"value": "0"
},
{
"name": "driver.flag.allow_killpower",
"value": "0"
},
{
"name": "driver.name",
"value": "nutdrv_qx"
},
{
"name": "driver.parameter.pollfreq",
"value": "30"
},
{
"name": "driver.parameter.pollinterval",
"value": "2"
},
{
"name": "driver.parameter.port",
"value": "auto"
},
{
"name": "driver.parameter.synchronous",
"value": "auto"
},
{
"name": "driver.state",
"value": "quiet"
},
{
"name": "driver.version",
"value": "2.8.2"
},
{
"name": "driver.version.data",
"value": "Voltronic-QS 0.09"
},
{
"name": "driver.version.internal",
"value": "0.36"
},
{
"name": "driver.version.usb",
"value": "libusb-1.0.27 (API: 0x100010a)"
},
{
"name": "input.voltage",
"value": "240.2"
},
{
"name": "input.voltage.fault",
"value": "240.2"
},
{
"name": "output.current.nominal",
"value": "5.0"
},
{
"name": "output.frequency",
"value": "49.8"
},
{
"name": "output.frequency.nominal",
"value": "50"
},
{
"name": "output.voltage",
"value": "234.5"
},
{
"name": "output.voltage.nominal",
"value": "230"
},
{
"name": "ups.beeper.status",
"value": "enabled"
},
{
"name": "ups.delay.shutdown",
"value": "30"
},
{
"name": "ups.delay.start",
"value": "180"
},
{
"name": "ups.firmware.aux",
"value": "PM-V"
},
{
"name": "ups.load",
"value": "15"
},
{
"name": "ups.productid",
"value": "5161"
},
{
"name": "ups.status",
"value": "OL"
},
{
"name": "ups.type",
"value": "offline / line interactive"
},
{
"name": "ups.vendorid",
"value": "0665"
}
],
"clients": [
"127.0.0.1"
],
"server_address": "192.168.1.253",
"server_port": 3493,
"logs": {
"total": [
0,
0,
0
],
"unread": [
0,
0,
0
]
}
}
],
"debug": [
"VER\n",
"Network UPS Tools upsd 2.8.2 - https://www.networkupstools.org/\n",
"LIST UPS",
"BEGIN LIST UPS",
"UPS tecnoware "tecnoware"",
"END LIST UPS",
"LIST VAR tecnoware",
"BEGIN LIST VAR tecnoware",
"VAR tecnoware battery.charge "100"",
"VAR tecnoware battery.voltage "13.9"",
"VAR tecnoware battery.voltage.high "13.00"",
"VAR tecnoware battery.voltage.low "10.40"",
"VAR tecnoware battery.voltage.nominal "12.0"",
"VAR tecnoware device.type "ups"",
"VAR tecnoware driver.debug "0"",
"VAR tecnoware driver.flag.allow_killpower "0"",
"VAR tecnoware driver.name "nutdrv_qx"",
"VAR tecnoware driver.parameter.pollfreq "30"",
"VAR tecnoware driver.parameter.pollinterval "2"",
"VAR tecnoware driver.parameter.port "auto"",
"VAR tecnoware driver.parameter.synchronous "auto"",
"VAR tecnoware driver.state "quiet"",
"VAR tecnoware driver.version "2.8.2"",
"VAR tecnoware driver.version.data "Voltronic-QS 0.09"",
"VAR tecnoware driver.version.internal "0.36"",
"VAR tecnoware driver.version.usb "libusb-1.0.27 (API: 0x100010a)"",
"VAR tecnoware input.voltage "240.2"",
"VAR tecnoware input.voltage.fault "240.2"",
"VAR tecnoware output.current.nominal "5.0"",
"VAR tecnoware output.frequency "49.8"",
"VAR tecnoware output.frequency.nominal "50"",
"VAR tecnoware output.voltage "234.5"",
"VAR tecnoware output.voltage.nominal "230"",
"VAR tecnoware ups.beeper.status "enabled"",
"VAR tecnoware ups.delay.shutdown "30"",
"VAR tecnoware ups.delay.start "180"",
"VAR tecnoware ups.firmware.aux "PM-V"",
"VAR tecnoware ups.load "15"",
"VAR tecnoware ups.productid "5161"",
"VAR tecnoware ups.status "OL"",
"VAR tecnoware ups.type "offline / line interactive"",
"VAR tecnoware ups.vendorid "0665"",
"END LIST VAR tecnoware",
"LIST CLIENT tecnoware",
"BEGIN LIST CLIENT tecnoware",
"CLIENT tecnoware 127.0.0.1",
"END LIST CLIENT tecnoware"
],
"logs": {
"total": [
0,
0,
0
],
"unread": [
0,
0,
0
]
}
}

[leon-ITA]

No news!

[ArthurMitchell42]

I've had a look through the data and there isn't a way to make even vaguely accurate estimate of run time. The only data that might be used is the battery charge percentage however that isn't reliable in terms of linearity and the data doesn't list a shutdown point meaning it isn't possible to match a kx + y extrapolation to it. This means that trying to extrapolate useful data from it would be nothing more than a guess.
The only thought I had was have you tried simulating a power outage? I wonder if the run time count might appear only when the unit is operating on battery. It's a long shot I know.

[weedy]

@leon-ITA If you fake power outages and got data over time and feed that to chatGPT I'm sure you can get a formula and then the "Reworking variables" support probably wouldn't be that bad.

But you need to get way more data.

AI slop incomming:

Extrapolating runtime for a UPS involves a mix of chemistry (the discharge curve of lead-acid batteries) and physics (the efficiency of the inverter). While the NUT variables don't explicitly state the battery's Amp-hour (Ah) capacity, we can deduce it from the standard configurations for Tecnoware models.

1. Estimating Battery Capacity

The nutdrv_qx driver and Voltronic-QS data are typical for the Tecnoware Era Plus or EVO DSP series.

• Voltage Profile: Your battery.voltage.nominal is 12V, meaning there is a single 12V battery inside.

• Standard Capacity: For a UPS of this size (running at 15% load with a nominal current of 5A), it almost certainly contains a 12V 7Ah or 12V 9Ah Lead-Acid battery.

2. The Runtime Formula

To calculate the runtime ($T$), we use the standard formula adjusted for efficiency and Peukert's Law (which accounts for the fact that batteries deplete faster under high loads):

$$T = \frac{V \times Ah \times \eta \times Peukert}{W}$$

Where:

• $V$ = Battery Voltage (12V)

• $Ah$ = Amp-hours (assuming 7Ah)

• $\eta$ = Inverter Efficiency (typically ~0.8)

• $W$ = Load in Watts

3. Extrapolated Estimates (at 15% Load)

Assuming a typical 800VA/480W Tecnoware unit, a 15% load is approximately 72 Watts.

Battery Size | Estimated Runtime (Minutes) | Notes -- | -- | -- 7Ah Battery | ~45 - 55 mins | Standard for Era Plus 750/900 9Ah Battery | ~60 - 75 mins | Standard for Era Plus 1100

---

Understanding the Discharge Curve

Lead-acid batteries do not drop voltage linearly. You can use your battery.voltage to track the remaining "State of Charge" (SoC) during an outage:

• 100% SoC: ~12.7V - 13.0V (Resting) / 13.5V+ (Charging)

• 50% SoC: ~12.1V

• 0% SoC (Cutoff): ~10.4V (Your battery.voltage.low setting)

Pro Tip: Your UPS is currently at 13.9V because it is on "Float Charge." As soon as the power cuts, you will see an immediate drop to ~12.8V. This is normal and called the "surface charge" dissipating.

Next Steps

To get a more precise number, could you check the sticker on the back or bottom of the UPS for the VA rating (e.g., 750VA, 1100VA)? I can use that to confirm the exact battery size and give you a minute-by-minute breakdown.

[leon-ITA]

Hi thanks for your interest my UPS Is 800VA
Thanks!