Blog

07
Jul 2021

FACTORY FINDINGS – ENERGY STORAGE & PV MODULE INSPECTION

Quality of energy storage system (ESS) varies greatly from supplier to supplier and from product to product. Today, STS recommends witnessing 100% of the ESS Factory Acceptance Tests (FAT) performed on your ESS. Here are a few examples of findings, just this month, at the FAT stage: damaged trays, inadequate dust proofing, scratched surfaces, grounding defect, failed static voltage test, failed water spray test, failed insulation withstand voltage, failed capacity test, and others… Some of these failures are safety hazards!

  • PV MODULE INSPECTION

Non-conforming PV Modules Packing

Pre-shipment inspection is important to catch the mis-practices at the phase of PV modules packing. From time to time, and it happened this month, we identify a non-standard packing causing the cables to be compressed and a potential risk of cable damage.dapibus leo.

We also had to reject a Lot with a >6% defects rate during Pre-Shipment Inspection, incl. frame scratches, frame deformation, broken glass, EL short circuits, and EL cracks. These defects are mostly caused by staff operation errors, such as mishandling, wrong binning, etc. Training of operators is critical. Verification on the production line that the operators are trained and a robust Pre-Shipment Inspection may capture these issues in the factory, before the modules are shipped.

It is World Quality Day on Nov.10, with the theme of “Quality Conscience: Doing the Right Thing”.For STS, every day is World Quality Day!
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