Method 1: Press the two buckles at the front of the AC terminal box respectively with both thumbs. Rotate the AC terminal box counterclockwise and remove it. Do not connect loads between an inverter and an AC switch that directly connects to the inverter. Otherwise, the switch may trip by mistake. If an AC switch is. . Network Application The inverter applies to grid-tied PV systems for commercial rooftop PV plants and large PV plants. The SUN2000 can also apply to the AC power system with the neutral point grounding of the step-up transformer. The SUN2000 itself does not connect to any neutral wire. Figure 2-4. . This quick guide describes how to install a solar inverter on a support. For details about wall-mounted installation, see the user manual. For models used in Australia, install the DC switch locking screw according to local standards. The DC switch locking screw is delivered with the solar inverter. . This document describes the following inverter models (also referred to as SUN2000) in terms of the safety precautions, product introduction, installation, electrical connections, power-on and commissioning, maintenance, and technical specifications. Read this document carefully before installing. . PV inverters use semiconductor devices to transform the DC power into controlled AC power by using Pulse Width Modulation (PWM) switching. PV Inverter System . Function If PV modules or cables are incorrectly connected or damaged, electric arcs may be generated, which may cause fire. Huawei solar. . An AC switch must be installed on the AC side of the inverter to ensure that the inverter can be safely disconnected from the power grid.