Voltage Irregularity Report

Brieske residence, Orcutt CA · Last 30 days · Mon Aug 24, 10:16 AM to Wed Sep 23, 10:16 AM · generated 2026-09-23 10:16:11 PDT

Since PG&E's monitor went up24 hours3 days7 days14 days30 daysAll time

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Measurement method: three TP-Link EP25 metering outlets record true-RMS line voltage once per second on both 120 V legs of the split-phase service. A Tesla Wall Connector supplies the 240 V line-to-line reference and grid frequency, which is independent of the neutral. A Ting (Whisker) sensor on Leg A samples far faster than 1 Hz and retains the lowest and highest voltage it sees, so it resolves brief excursions that a 1 s RMS average necessarily flattens in both directions. Where the two disagree, the Ting figure is the closer estimate of the real extreme. What is listed: any reading below 114 V (the ANSI C84.1 Range A lower limit) and any reading above 127 V (the Range B upper limit) at 120 V nominal. Undervoltage dims and stalls equipment; sustained overvoltage damages it, so both are reported.

36,244 samples logged today across 87 retained detail files.

Also recorded but not listed individually: 5 brief high readings on a 120 V branch meter, peaking at 126.7 V. These are held back for two reasons: readings between 126 V and 127 V are inside ANSI Range B, which the standard tolerates as occasional; and none of them were confirmed by the neutral-independent 240 V line-to-line reference, which never left its limits. They are reported as a count so that nothing is hidden, not because they are being claimed.

Irregularities listed
3
Low / high
3 / 0
Corroborated by Ting
2
Lowest branch meter
113.19 V
Lowest Ting reading
118.50 V
Lowest 240 V reference
233.1 V
Time out of range
2 min 55 s

When they happen

00:00 ×1   21:00 ×2

Irregularities (newest first)

1. 2026-09-23 00:00:22 UNDERVOLTAGE

lasted 3 seconds · 4 samples out of range · outside Range A
MINOR LEG IMBALANCE
Lowest reading113.75 V on 3D Printer - Mikes Room
Leg A / Leg B120.55 V  /  116.73 V  (3.82 V split)
240 V service reference235.9 V
Meters affected3D Printer - Mikes Room
No independent Ting reading was recorded inside this window.
The legs differed by more than the tracking threshold, but neither fell far enough below its calm baseline or below the ANSI Range A limit to count as a sag. Normal load imbalance looks like this.

2. 2026-09-01 21:15:16 UNDERVOLTAGE

lasted 2 minutes 45 seconds · 166 samples out of range · outside Range A
LOCAL/BRANCH DROP
Lowest reading113.19 V on 3D Printer - Mikes Room
Leg A / Leg B120.36 V  /  113.45 V  (6.91 V split)
240 V service reference233.1 V
Meters affected3D Printer - Mikes Room, Computer and TV - Mikes Room
Ting recorded 118.50 V during this event
Ting samples faster than the branch meters, so this is the closer estimate of the real extreme.
A branch measurement fell without confirming movement at the 240 V service reference.

3. 2026-09-01 21:14:49 UNDERVOLTAGE

lasted 7 seconds · 8 samples out of range · outside Range A
LOCAL/BRANCH DROP
Lowest reading113.96 V on 3D Printer - Mikes Room
Leg A / Leg B120.36 V  /  113.45 V  (6.91 V split)
240 V service reference233.1 V
Meters affected3D Printer - Mikes Room
Ting recorded 118.50 V during this event
Ting samples faster than the branch meters, so this is the closer estimate of the real extreme.
A branch measurement fell without confirming movement at the 240 V service reference.
Labels describe the simultaneous meter pattern. They do not assert a confirmed physical cause; that determination belongs to the utility or electrician after inspecting the service.