Thin-film PVs Technology Applied in Malawi

02 · Video Outline Section 1: Introduction to Photovoltaic Technology in Malawi

The presentation focuses on photovoltaic technology, its principles, challenges, and solutions in Malawi, a southeastern African country with limited access to electricity.

03 · Section 2: Malawi’s Context

• Malawi is characterized by widespread poverty and limited access to electricity, with only about 11% of the population having electricity access.

• The majority of Malawi’s electricity is generated through hydropower, but solar energy has not been significantly utilized despite the unreliability of hydropower due to droughts.

04 · Section 3: Thin-Film Photovoltaic Technology

• The presentation discusses thin-film photovoltaic cells, comparing them with traditional silicon solar cells.

• Technical principles of thin-film PVs include layers of transparent conductive glass, zinc oxide, n-type and p-type semiconductors, a thin-film solar cell material layer, a metal reflective layer, and metal electrodes.

• Advantages of thin-film PVs in Malawi: lower manufacturing costs due to reduced silicon use, good light absorption, and high light-sensitivity suitable for Malawi’s climate.

• Challenges: Lower efficiency and less durability than silicon-based cells, requiring enhancements in charge carrier transport and advanced encapsulation methods.

05 · Section 4: Setting up a PV Solar Station in Malawi

• Challenges include partial shading and soiling of PV modules.

• Solutions: Installation of bypass diodes to mitigate shading issues and anti-soiling coatings to reduce dust and debris accumulation.

• Trade-offs: While these solutions improve system performance, they also increase costs, posing a challenge for economically constrained Malawi.

06 · Section 5: Global Challenges in Developing Power Systems in Malawi

• Financial limitations: Malawi’s low GDP and high poverty rate hinder infrastructure financing.

• Climate change impact: Vulnerability to climate change with risks of floods, droughts, and cyclones damaging power infrastructure.

• Logistical and infrastructural challenges: Difficulties in transporting materials and equipment due to Malawi being landlocked and located in a seismically active region.

07 · Section 6: Conclusion

The presentation concludes with a summary of the discussion on thin-film PV technology, its application in Malawi, and the corresponding global challenges.