An international study found that the specific power of commercial silicon solar modules increased from 8.5 W/kg in the early 2000s to 23.6 W/kg today, driven by advances in module design, bifaciality, and temperature management. The researchers highlighted that glass and framing dominate module weight, and considering operating conditions like nominal operating cell temperature and rear-side illumination is essential for accurate PV system design.
Performance and physical parameter distributions of commercial crystalline silicon photovoltaic modules.
Image: UNSW, Cell Reports Physical Science, CC BY 4.0
From pv magazine Global
An international research team has found that the specific power of commercial silicon solar modules increased from around 8.5 W/kg In the early 2000s to 23.6 W/kg today.
The specific power of a PV module measures how much electrical power the module produces per unit of weigh. This metric can also be expressed in W/m2 and helps compare the efficiency of different solar panels regardless of their size or weight. It is especially important in space applications or portable solar panels, where weight matters more than area.
Their analysis also indicated that aluminum frames constitute 6%–19% of module weight, while encapsulants account for 2%–15%. Other components, including cells, junction boxes, backsheets, and interconnections, collectively contribute 8%–16% of the total weight. The researchers noted that while thinner glass or lighter frames can enhance specific power, such modifications may compromise mechanical reliability. Overall, they concluded that glass and framing are the principal factors governing module weight, efficiency, and handling challenges.
Their findings are available in the paper “Increasing specific power and the emergence of new markets for crystalline silicon photovoltaics,” published in Cell Reports Physical Science. The research group comprised scientists from the University of South New Wales (UNSW)  and the Newcastle Energy Centre in Australia, the Federal University of Santa Catarina (UFSC) in Brazil, the US Department of Energy’s National Laboratory of the Rockies, the University of Oxford in the United Kingdom. 
This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.
More articles from Emiliano Bellini
Please be mindful of our community standards.
Your email address will not be published. Required fields are marked *
Comment *
Name *
Email *
Website
Save my name, email, and website in this browser for the next time I comment.


Δ
By submitting this form you agree to pv magazine using your data for the purposes of publishing your comment.
Your personal data will only be disclosed or otherwise transmitted to third parties for the purposes of spam filtering or if this is necessary for technical maintenance of the website. Any other transfer to third parties will not take place unless this is justified on the basis of applicable data protection regulations or if pv magazine is legally obliged to do so.
You may revoke this consent at any time with effect for the future, in which case your personal data will be deleted immediately. Otherwise, your data will be deleted if pv magazine has processed your request or the purpose of data storage is fulfilled.
Further information on data privacy can be found in our Data Protection Policy.
pv magazine USA offers daily updates of the latest photovoltaics news. We also offer comprehensive global coverage of the most important solar markets worldwide. Select one or more editions for targeted, up to date information delivered straight to your inbox.
Δ
Legal Notice Terms and Conditions Privacy Policy © pv magazine 2026
Δ
Welcome to pv magazine USA. This site uses cookies. Read our policy. ×
The cookie settings on this website are set to “allow cookies” to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click “Accept” below then you are consenting to this.
Close

source