⚠
warning Upgraded
Error Code BTS - - - °C
Battery Temperature Sensor (BTS) display showing '- - - °C' — battery electrolyte temperature is below 0°C (32°F).
? What Causes This
Ambient or battery temperature has fallen below 0°C. The display cannot show negative values, so shows dashes instead.
✓ How to Fix It
- Ensure the battery compartment temperature is maintained above 0°C.
- Move the battery system to a warmer location.
- Consider insulating or heating the battery compartment for cold climates.
- Check that the BTS sensor is properly connected.
- Note that the lower limit for temperature compensation is 0°C.
Source: page 45 of the official manual
From the manual
This error code appears in:
Upgraded 30A Solar Charge Controller