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Building power monitoring

power monitor online by Rafael Costa

Incoming supply for the whole building. Tenants ask what happened. Now I can tell them.

Latest Reading

Supply voltage

228.8 V

Minimum voltage

226.9 V

Frequency

50 Hz

Harmonic distortion

2.6 %

Mains available

100 %

Outages

0

Time without mains

0 min

Voltage sags

0

Last updated: 7/31/2026, 8:32:27 PM

Insights

↑ rising ↗ trending up → stable ↘ trending down ↓ falling L = low, ~ = avg, H = high anomaly

Historical Plot

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Telemetry Data

Live
TimeSupply voltage (V)Minimum voltage (V)Frequency (Hz)Harmonic distortion (%)Mains available (%)Outages Time without mains (min)Voltage sags
7/31/2026, 8:32:27 PM228.8 V226.9 V50 Hz2.6 %100 %00 min0
7/31/2026, 8:17:24 PM229 V226.5 V49.99 Hz2.6 %100 %00 min0
7/31/2026, 8:00:00 PM229 V226.6 V50 Hz2.6 %100 %00 min0
7/31/2026, 7:45:00 PM229.3 V226.8 V49.99 Hz2.6 %100 %00 min0
7/31/2026, 7:30:00 PM229.3 V226.4 V50 Hz2.6 %100 %00 min0
7/31/2026, 7:15:00 PM228.7 V225.5 V49.99 Hz2.6 %100 %00 min0
7/31/2026, 7:00:00 PM230.7 V226.9 V50 Hz2.7 %100 %00 min0
7/31/2026, 6:45:00 PM228.8 V226.4 V49.99 Hz2.6 %100 %00 min0
7/31/2026, 6:30:00 PM229.4 V227.3 V50.01 Hz2.6 %100 %00 min0
7/31/2026, 6:15:00 PM229.7 V227 V50 Hz2.7 %100 %00 min0
7/31/2026, 6:00:00 PM227.3 V189.1 V50 Hz2.6 %100 %00 min1
7/31/2026, 5:45:00 PM229 V225.6 V50.02 Hz2.7 %100 %00 min0
7/31/2026, 5:30:00 PM229.7 V226.5 V50 Hz2.6 %100 %00 min0
7/31/2026, 5:15:00 PM228.7 V226.8 V49.99 Hz2.6 %100 %00 min0
7/31/2026, 5:00:00 PM229.6 V226.7 V50.01 Hz2.6 %100 %00 min0
7/31/2026, 4:45:00 PM229.2 V226.4 V50 Hz2.6 %100 %00 min0
7/31/2026, 4:30:00 PM228.4 V226.6 V49.99 Hz2.6 %100 %00 min0
7/31/2026, 4:15:00 PM229.1 V197.1 V50 Hz2.7 %100 %00 min1
7/31/2026, 4:00:00 PM229 V226.3 V50 Hz2.6 %100 %00 min0
7/31/2026, 3:45:00 PM228.6 V225.7 V50 Hz2.6 %100 %00 min0
7/31/2026, 3:30:00 PM228.8 V225.4 V49.98 Hz2.6 %100 %00 min0
7/31/2026, 3:15:00 PM227.8 V203.6 V50 Hz2.6 %100 %00 min1
7/31/2026, 3:00:00 PM229.9 V227.8 V50 Hz2.6 %100 %00 min0
7/31/2026, 2:45:00 PM228.8 V226.1 V50.01 Hz2.6 %100 %00 min0
7/31/2026, 2:30:00 PM229.8 V227.5 V50.01 Hz2.6 %100 %00 min0