LIAM

The “Easy-to-install AC modules (LIAM)” project aims to develop photovoltaic modules with integrated micro-inverters (AC modules). These AC modules should be cost-effective, allow for simplified installation, achieve higher yields under partial shading, provide increased safety in the event of a fire, and allow for individual module monitoring. This project combines the previously separate worlds of modules and inverters and taps into previously untapped optimization potential.

Based on Solarnative GmbH's high-frequency technology, miniaturized inverters are used that can be integrated into photovoltaic modules. A new “easy installation” design is used for the frames. A new layout is being developed on the module side that delivers higher yields in partial shade. The integrated micro-inverter, which has highly efficient high-current electronics, takes over the function of the bypass diodes. To prevent individual solar cells from overheating, which can occur particularly with new cell and module technologies, the micro-inverter offers special “hot cell” protection. The AC modules are tested under various relevant conditions to cover a wide range of applications.

At ISFH, the focus is on developing module layouts for maximum energy yield, modeling and testing hotspot/hotcell protection, and coupling the microinverter-integrated frame to the photovoltaic module. Furthermore, laminated stone modules are being further developed in terms of their performance. Finally, various module designs are tested in the field for their shading performance.