Features: (for 10A/20A) Automatic identification for system voltage: 12V/ 24V. 5 working modes (light control/ light control + time control/ manual mode/ debugging mode/ normal on) facilitate the product\'s application to different types of load, such as streets lights and monitoring devices. An upgraded 3-stage PWM charging algorithm is adopted. Application of an equalizing charge to the battery periodically or when over discharged, can effectively prevent the battery from non-equalization and sulfration, thus extending its service life. With temperation compensation employed, charging parameters can be automatically adjusted. PV input voltage range＜55V, which is suitable for various