MI-510S PV Module Selector (MTI.AWS.EK.510S) For PV cells & modules up to 3000W PV-Blocks is a unique and versatile set of instruments for testing and analysing PV technology, from small cells to PV modules and complete strings. PV-Blocks supports Silicon, Thin-Film, Perovskite, Hybrid materials, organic PV and even the latest high-capacity Bi-facial modules.