DC UPS (Lithium)
What is it?
DC UPS is a lithium battery-powered uninterruptible power supply, which can provide backup power to devices like routers, switches, modems, single board computers, etc.
In contrast to commercially available UPSes, it uses off-the-shelf 18650 Li-Ion cells and outputs DC voltage directly.
This is significantly more efficient than providing AC power through an inverter.
The DC UPS provides backup power in a power outage without any interruption.
So called “Offline UPS” will have a short switching delay/interruption in power delivery, which can influence sensitive devices. Traditional “Online UPS” are expensive and waste a lot of power internally.
DC UPS size in comparison to a commercially available lead-acid UPS
Features
- 3 DC outputs
- Selectable output voltage (9V/12V/12.5V/15V)
- USB-C power output (5V only, 3A)
- Builtin, easy to replace batteries (2x Li-Ion 18650)
- Builtin Prometheus-exporter with comprehensive metrics
- Open Source firmware (ESP32-based, esp-idf framework)
- Easy software updates via rear USB port
Prometheus exporter
Integrated prometheus exporter provides a modern API to monitor temperatures, voltages, etc. via tools like Grafana:
