BISS - Business Institute Solar Strategy

  • english language
  • Deutsche Sprachversion


Modular performance packages for comprehensive quality.

QInvest-Solar is the independent quality assurance program from Business Institute Solar Strategy, which allows a standardized inspection for each stage of the installation and operation of a PV system.

Quality assurance consists of modular service packages, running from expert opinions regarding planning and projected yield to the evaluation of individual components and their manufacturing, the installation of the system and its startup, all the way to the evaluation of maintenance concept offered.

With the comprehensive quality assurance program, QInvest-Solar, BISS examines the factors influencing yield and costs and proposes optimizations to the investor. The results provide a basis for maximum yield at minimum risk.

Performance Packages from QInvest-Solar

QInvest Planning Audits of system planning with yield prognosis including bid documents and purchase contracts.
QInvest Module Manufacturing Quality assurance at the production site during the production of the PV modules.
QInvest Modue Delivery Measuring of the actual delivered performance of the PV modules, as well as additional quality characteristics, after delivery takes place.
QInvest Additional Components Measuring of actually delivered productivity of the other components, such as inverters, mounting systems and cables, as well as additional quality characteristics, after delivery takes place.
QInvest Construction System audit prior to, during, and after installation, including final inspection and commissioning of the PV system.
QInvest Maintenance Audit of the maintenance and monitoring concept of the PV system.

In particular, Qinvest Planning inspects whether and how the interaction of quality-assured components results in maximum profits. The service package contains recommendations for the selection of quality-inspected components and how to optimize the agreement so that operators can increase the yield of their PV system. The package is based on local conditions, recognized calculation models, our longtime experience in planning and evaluation of PV systems, as well as planning documentation.

QInvest Module Manufacturing inspects at the location how far the expected high-quality requirements were actually realized during production. Experience has shown that a manufacturer’s module quality very much depends on the manufacturing processes and quality management systems in the module factory. Our experienced employees inspect the quality during each quality-relevant manufacturing step and can reject modules not complying with the desired standard.

  • (Source: Business Institute Solar Strategy 2008)

QInvest Module Delivery measures the performance of a statistically relevant module sample, which forecasts the total performance under standard test conditions (STC). Additional tests, such as low-light measurements, electroluminescence, and infrared tests provide information about the actual delivered performance as well as the long-term behavior. Testing takes place at independent testing institutes, such as the Photovoltaik-Institut Berlin, Germany.

  • Electroluminescence detects micro-tears which can spread during ongoing operation.

    Electroluminescence detects micro-tears which can spread during ongoing operation. (Source: Photovoltaik-Institut Berlin)

QInvest Additional Components inspects inverters, cables, and substructure for performance, long-term behavior, and safety. This guarantees the investor that his PV system will last for a long time.

During the structural implementation QInvest Construction randomly checks the compliance of the planned system design as well as the compliance with quality-assurance worksteps. Prior to installation, all components are visually and haptically checked. After installation, an inspection takes place during which all PV modules or a module sample are checked using thermal imaging and electric measurements.

Qinvest Maintanence checks the maintenance and monitoring concept for contractual conditions, selection of technical components of the monitoring system, and technical and administrative interaction of the monitoring system. The goal of a good monitoring system is the assurance of early error detection in the system as well as minimizing downtimes.