Product Description  500W Grid tie micro inverter 12v for PV  open circuit voltage range:16v-28v AC90V-140V or 190V-260V, workable for 300W-560W solar panesl  or 12v Battery                                  Product Features:  1. 16V~28V inverter connected solar panel: open circuit voltage of 16V~28V, mppt 12v-22v dc or 12V battery;  2. Battery mode (automatic identification) with battery low voltage protection.  3. Battery mode output power manual adjustment function.  upgraded the new adjustable power inverter,  Its advantages:  1) It adds a solar panel and battery operation mode switch.  2) In battery mode, the knob can switch from 100W to 380W any mobilization  3) It adds to record each time you turn off the last set of power  The latest upgrade adjustable power inverter  1) adds a new solar panel and battery operation mode switch (two independent mode operation, safe and reliable)  2) rotary switch from 100W to about 370W any mobilization  3) In battery mode, the new increase can be recorded each time you turn off the last set output power                                                                                                                                                                                                                                              Specifications:  PV grid-connected inverter operating mode  The grid-tied inverter has an automated working order, without needing to monitor. On detection the power output from solar panels, device will decide if the power was large enough to begin the conversion process. Coversion process includes 5 modes, Startup, Grid-tied begin, Standby, Stop, Fault-find.    Startup - When the start button is on, solar panel and grid lines both connected in normal condition, inverter enters working condition.    Grid-tied begin - Grid-tied begin mode is when inverter starts to convert the Direct Current fed through from PV solar panel to a stable Alternate Current and flow to the utility grid. To enable the maximum output of energy, the device uses MPPT control technology to track sun rays, this technology promises the maximum efficiency under diferent daylight and temperature conditions.    Standby - Standby mode is when device detects insufficient power feeding through from the solar panel, or device detects abnormal status such as voltages, frequencies, and temperatures not in the permitted range, the device enters standby mode.    Stop - Insufficient sunlight hence insufficient PV power feeding through to the device and device enters into the standby mode, when this condition continues and DC voltages falls below 12V for over 1 minute, the device will enter Stop mode.  When error ocurs, fault find indicator starts flashing, device will enter Stop mode. Please see 3.4 error status on LED indicator.