Dries Buytaert

Solar panel, Boston

64%
Last update: ago
Battery: 64%

I have a solar-powered website at solar.dri.es (mirror). It runs on a Raspberry Pi with a solar panel on our roof deck.

Every 10 minutes, the Raspberry Pi updates this status page. This page is hosted separately, so if my solar-powered website goes offline due to an extended lack of sunlight, cold preventing the battery from recharging, or a system crash, you should be able to see that here.

Metric Status
Last update 4 min 23 sec ago
Day or night Night
Battery capacity 64%
Battery charging Not charging - no sunlight
Charge type Not charging
Outdoor temperature 0°C
Solar system uptime 451 days
Raspberry Pi uptime 19 days
CPU usage 9%
CPU temperature 29°C (normal)
Memory usage 42%
Disk usage 4%
WiFi strength Good
Power supply 1.26V (normal)

Hourly battery charge

October 27th October 26th October 25th October 24th October 23rd October 22nd October 21st October 20th October 19th October 18th October 17th October 16th October 15th October 14th 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

A green square means the battery is well-charged and can power the Raspberry Pi for several days. A red square indicates the battery charge is low and requires solar charging soon. A grey square means the Raspberry Pi was offline.

Daily battery levels

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 2025-08-28 2025-09-03 2025-09-09 2025-09-15 2025-09-21 2025-09-27 2025-10-03 2025-10-09 2025-10-15 2025-10-21 2025-10-27

This graph displays the battery's highest (green solid line) and lowest (red dotted line) charge levels each day. It helps track trends and assess the risk of the Raspberry Pi shutting down due to insufficient sunlight or extreme temperatures, which prevent the battery from charging.