Saturday Feb 04, 2023

Key Points of Inverter Selection in BIPV Project – Saurenergy


Highlights :

  • BIPV is one of the fastest growing solar categories, as firms integrate solar into buildings at the building stage itself.
  • BIPC requires a level of expertise to ensure firms get the most out of their BIPV systems. This article talks about inverter selection for such projects.


The organic combination of PV system and buildings makes it fashionable and practical to create green buildings that meet key climate objectives too. These Building Integrated Photo Voltaic or BIPV systems are gaining in popularity with responsible corporates, as they help deliver key objectives of green energy, conservation, and sustainability for new constructions and old both.

This Solis seminar will take you to share the characteristics of the BIPV project and the key points of inverter selection.

BIPV project characteristics

In a BIPV project, it is necessary to design the PV system according to the structural characteristics of the building itself. Often the roof area of some buildings is not sufficient. Therefore, in addition to the roof area, other areas of the building need to be used to develop PV curtain walls, daylighting roofs, shading, etc. Many forms.

Due to the aesthetic needs of BIPV projects, solar panels are more biased towards power-generating glass, double-glass cells and thin-film cells. Thin-film cells have excellent light transmittance and aesthetics, better low-light conditions, and better scattered light absorption performance. The curtain wall BIPV field occupies the mainstream position. Thin film batteries mainly include copper indium gallium selenium (CIGS), cadmium telluride (CdTe), perovskite (PSC) and other material routes. The PV panels of different material routes lead to different schemes whenthe system chooses the inverter configuration.

In addition, because the BIPV project has a complex structure and diverse orientations, especially projects that combine multiple application forms, it is necessary to fully consider the project structure, electrical, and safety issues when designing the PV system.

BIPV project inverter selection

Judging from the main features of the BIPV project, there are many architectural application scenarios, such as flat roofs, inclined roofs, curtain walls, transparent roofs, sunshades, etc. In addition, the inclination angle is complex and the selection of materials is diverse, so the following issues must be considered when choosing an inverter.

  1. BIPV projects give priority to string inverters

The orientation, inclination, and component selection of the BIPV project are complex and diverse, so try to choose a string inverter with multiple MPPTs, so that the PV system has a better maximum power tracking advantage, and effectively copes with the above-mentioned disadvantages.

  1. PV panels of different materials need to choose the corresponding inverter configuration scheme

In the BIPV project, due to the requirements of aesthetics and maximization of benefits, different building areas will use different PV panels. For example, flat roofs use crystalline silicon panels, light-transmitting areas use photovoltaic power generation glass, and walls use thin-film PV panels. Therefore, it is necessary to select a suitable inverter for solution configuration according to the selected component materials.

If the component material is a crystalline silicon component or a cadmium telluride thin-film PV panel, you can use a photovoltaic inverter with a Transformerless topology and configure it in accordance with the conventional method.

If the PV panels use  a thin-film cell that requires negative grounding, since the panel is grounded negatively, the possibility …….


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