Fritzing

Low voltage disonnect for 12v solar applications. 

I wanted to build a low voltage disconnect. Input 12v from battery bank. Output is a simple on/off to control a switch wired to my pure sine wave inverter. 

The trick to a proper LVD is a timer. This design turns "off" or "on" after target voltages are reached for 10 full seconds. This avoids hysteresis.