Considerations for Electrical Connection of Home Solar PV System

1. Electrical analysis of home solar PV system

Under normal conditions, a photovoltaic module of a home solar PV system may generate higher current and voltage than under standard test conditions. When photovoltaic modules are connected in series, the voltages are added. When photovoltaic modules are connected in parallel, the current is additive. Photovoltaic modules with different electrical characteristics cannot be connected in series. Connecting photovoltaic modules to different electrical components may cause electrical connection mismatches. Be sure to install them according to the installation manual. The maximum number of components that can be connected in series in each row must be calculated in accordance with relevant regulations, and its open circuit voltage value cannot exceed the maximum system voltage value specified by the component and the withstand voltage value of other DC electrical components under the lowest expected local temperature. If a reverse current that exceeds the maximum fuse current of the module passes through the module, the module must be protected by an overcurrent protection device of equal specification.

2. Cable and wiring installation of home solar PV system

The photovoltaic modules of the home solar PV system have two light-resistant output cables, and the terminals are connectors. These plugs can meet most installation requirements. The positive cable terminal is a female plug, and the negative cable terminal is a male plug. The connection line of the module is not only designed for the series connection of the module, but also can be connected with the third-party equipment equipped with the wiring device. The connection needs to follow the equipment manufacturer's instruction manual. When the cable is fixed on the bracket, it is necessary to avoid mechanical damage to the cable or component. To fix the cables, you must use UV-resistant cable ties and wire clips to fix them on the bracket. At the same time, try to avoid direct sunlight and water soaking cables.

3. Mechanical connection installation of home solar PV system

General components have been certified for mechanical loads. During or after the installation of the photovoltaic modules of the home solar PV system, please do not step on or place heavy objects on the surface of the modules to prevent the cells from cracking. Home solar PV systems must be able to withstand the maximum wind pressure and snow pressure when designing brackets and other mechanical parts. When choosing the grounding method, you must not cause direct contact between the frame of the photovoltaic module and other metals to avoid electrical corrosion. In order to keep the distance between the glass surface of the fire-rated photovoltaic module and the roof surface should be at least 10cm. The distance between adjacent photovoltaic modules installed must be at least 2cm. People could get home solar PV systems in Anern solar supply store.

Installation of home solar PV system connectors: Before connecting the connector, keep it dry and clean, and ensure that the connector cover is firm. At the same time, avoid direct sunlight, water immersion, and place the plug on the ground or roof surface. Incorrect connections can cause arcing effects and electric shocks. After installation, you must check whether all electrical connections are firm, and at the same time make sure that all plugs are fully inserted.