Building power monitoring

Name: Building power monitoring
Creator: Rafael Costa

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

229.3 V

Minimum voltage

226.5 V

Frequency

50 Hz

Harmonic distortion

4.7 %

Mains available

100 %

Outages

Time without mains

0 min

Voltage sags

Last updated: 8/8/2026, 12:42:20 PM

Insights

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

Historical Plot

Aggregation:

Chart:

Drag on chart to zoom in

Telemetry Data

Live

Time range:

Time	Supply voltage (V)	Minimum voltage (V)	Frequency (Hz)	Harmonic distortion (%)	Mains available (%)	Outages	Time without mains (min)	Voltage sags
8/8/2026, 12:42:20 PM	229.3 V	226.5 V	50 Hz	4.7 %	100 %	0	0 min	0
8/8/2026, 12:27:13 PM	228.6 V	226.5 V	49.99 Hz	4.6 %	100 %	0	0 min	0
8/8/2026, 12:12:06 PM	229.3 V	225.7 V	49.98 Hz	4.6 %	100 %	0	0 min	0
8/8/2026, 11:51:57 AM	229.2 V	226.2 V	49.99 Hz	4.6 %	100 %	0	0 min	0
8/8/2026, 11:36:50 AM	229.8 V	225.3 V	49.99 Hz	4.6 %	100 %	0	0 min	0
8/8/2026, 11:21:43 AM	229.2 V	227.8 V	50 Hz	4.5 %	100 %	0	0 min	0
8/8/2026, 11:06:36 AM	230.6 V	226.8 V	50.01 Hz	4.3 %	100 %	0	0 min	0
8/8/2026, 10:36:25 AM	231 V	227.6 V	50 Hz	4.2 %	100 %	0	0 min	0
8/8/2026, 10:21:18 AM	61.9 V	0 V	13.34 Hz	4.1 %	26.5 %	0	11 min	0
8/8/2026, 10:06:11 AM	0 V	0 V	0 Hz	4 %	0 %	0	15 min	0
8/8/2026, 9:51:03 AM	0 V	0 V	0 Hz	3.8 %	0 %	0	15 min	0
8/8/2026, 9:35:54 AM	0 V	0 V	0 Hz	3.8 %	0 %	0	15 min	0
8/8/2026, 9:20:47 AM	174.2 V	0 V	37.5 Hz	3.6 %	75 %	1	7.5 min	0
8/8/2026, 8:50:35 AM	231.9 V	199.6 V	50 Hz	3.3 %	100 %	0	0 min	1
8/8/2026, 8:35:28 AM	233.2 V	230 V	50.01 Hz	3.3 %	100 %	0	0 min	0
8/8/2026, 8:20:22 AM	232.2 V	205.7 V	50 Hz	3.3 %	100 %	0	0 min	1
8/8/2026, 8:00:00 AM	233.6 V	231.3 V	50.01 Hz	3.1 %	100 %	0	0 min	0
8/8/2026, 7:45:00 AM	233.2 V	232.4 V	49.99 Hz	2.9 %	100 %	0	0 min	0
8/8/2026, 7:30:00 AM	234.3 V	231.9 V	49.98 Hz	2.8 %	100 %	0	0 min	0
8/8/2026, 7:15:00 AM	233.3 V	231.6 V	50 Hz	2.8 %	100 %	0	0 min	0
8/8/2026, 7:00:00 AM	234.5 V	230.7 V	49.99 Hz	2.7 %	100 %	0	0 min	0
8/8/2026, 6:45:00 AM	234.3 V	230.8 V	49.99 Hz	2.6 %	100 %	0	0 min	0
8/8/2026, 6:30:00 AM	232.8 V	197.8 V	50 Hz	2.6 %	100 %	0	0 min	1
8/8/2026, 6:15:00 AM	235 V	231.5 V	50 Hz	2.5 %	100 %	0	0 min	0
8/8/2026, 6:00:00 AM	233.9 V	231.5 V	49.99 Hz	2.5 %	100 %	0	0 min	0