1000W Grid tie inverter, Pure Sine Wave Inverter DC10.8V-30V to AC90-140V Output. 18V Solar Panel, Vmp: 18-21V, Voc: 20-24V Please be noted, This grid tie inverter cannot be used as off grid/stand alone solar system. The output need to be connected to the grid power. Can not supply power directly to the AC loads. 1000W Grid Tie inverter is a compact unit, which directly converts direct current into alternating current for powering appliances and/or office equipments and connecting to utility grid. The AC output from Smart Micro inverter is synchronized and in-phase with the utility grid. Here is the reason. This unit was ideally designed for a 18V solar panel If using 12v battery as input, the inverter will not reach it’s max power point. We will suggest using 24v battery as input source to get a better output power. This is On Grid. The AC output needs to be connected to the grid. Vmp(of a solar panel) must be in the MPPT range to ensure the good output efficiency? Red / green lights flash alternating. This is the solar panel power or voltage is too low? 200W-1000W Solar Panel:Vmp: 18-21V, Voc: 20-24V? Please do not use other voltage input, for example: (10.8V-15V)and (25-30V)? The DC positive and negative connections are reversed, and the inverter Led will not light up. Micro Grid Tie Inverter Doesn’t work with 12V battery? Each time you move the inverter, tighten the DC connection terminals. Avoid short circuit of DC terminal due to loose connection? Micro Inverter Max Power Point Tracking and Stackable, Island Protection. If the DC connection is loose and causes a short circuit, then smoke may be emitted. The inverter adopts aluminum alloy casing, so there is no fire. Please note: Do not use it together with a bidirectional meter in the local power grid. This is because the excess power from the inverter will be fed back into the grid, resulting in increased electricity costs. For a bidirectional power grid, we recommend using our SUN-Inverter series.