... , uninterruptible power supply can be sustained.3, Automatic intelligent. Inverter controller chip microcomputer, without interference, fullyautomatic digital control.4 ... failure automatic recovery.5, Long service life. Solar panel design life of 20 years, one-time purchase of equipment, ... , Emergency EnergyDC Charging Time: 12-20 Hours (depend on the capacity of battery)Solar Charging Time: 2~4 Days ( ...