{"id":70896,"date":"2024-10-18T08:00:39","date_gmt":"2024-10-18T06:00:39","guid":{"rendered":"https:\/\/www.vpsolar.com\/?p=70896"},"modified":"2024-10-18T08:10:07","modified_gmt":"2024-10-18T06:10:07","slug":"inverters-for-pv-commercial-systems","status":"publish","type":"post","link":"https:\/\/www.vpsolar.com\/en\/inverters-for-pv-commercial-systems\/","title":{"rendered":"Inverters for PV commercial systems"},"content":{"rendered":"

The main difference between inverters for residential and<\/strong> commercial systems is the size<\/strong>. It actually determines the inverter\u2019s employment. Usually commercial inverters are those with a power higher than 10kW<\/strong>.<\/p>\n

Generally commercial inverters<\/strong> are certified CEI 0-21 as well as CEI 0-16, regulating the connection to low, medium and high voltage grids .<\/p>\n

Energy conversion is not their only feature. They actually do implement technologies to make a more efficient and long-lasting system. As follows some of the involved technologies:<\/p>\n

MPPT: Maximum Power Point Tracker<\/h2>\n

Using MPPT (Maximum Power Point Tracker) the inverter maximizes energy production<\/strong> by photovoltaic modules. This technology ensures that every single photovoltaic string works at its maximum power point.<\/p>\n

Anti-PID technology<\/h2>\n

Photovoltaic modules performances are mainly affected by PID<\/strong> (Potential Induced Degradation). A degradation caused by voltage difference between the cells and modules\u2019 frames.<\/p>\n

Anti-PID technology is now implemented to all commercial inverters in order to reduce performance degradation<\/strong> of PV modules.<\/p>\n

Arc Fault Circuit Interruption<\/h2>\n

Commercial inverters are usually equipped with AFCI<\/strong> (arc-fault circuit interrupter). A device aiming to interrupt the circuit when electric arcs are detected. An hazard to be avoided as it\u2019s an evidence of loose connections in the wiring.<\/p>\n

One of the most common causes of fires on roofs where PV systems are placed.<\/p>\n

Multistring<\/h2>\n

Recent inverters manage to connect multiple strings of modules to the same MPPT. Allowing to simplify installation by avoiding junction boxes.<\/p>\n

Technical features<\/h2>\n

Commercial inverters have a power starting from 10\/20 kW<\/strong>. Generally it is accepted DC input up to 1000V\/1100V.<\/p>\n

MPPTs change from 2 to 10 depending on inverter power. Concerning the output it is three-phase at 400V.<\/p>\n

These devices are usually equipped with safety systems such as:<\/p>\n