Tom photographed these visual defects and sent the images off with a query to REC. This was the response:<\/p>\n
Understanding the visual appearance of white line along the wire on<\/strong>
\nREC Alpha Series<\/strong><\/p>\n <\/p>\n
Introduction<\/strong><\/p>\n <\/p>\n
The REC Alpha Series uses an advanced cell connection technology where an innovative with thin wire combination connects the solar cells and finger metallization and eliminates the need for soldering on busbars. This cell stringing process is non-invasive and avoids the use of busbar to reduce optical shading within panel. Hence, overall product performance quality and durabilty are improved.<\/p>\n
<\/p>\n
White line observed along wire on REC Alpha Series<\/strong><\/p>\n <\/p>\n
The visual appearance of white line observed along wires is the difference in material thermal conductivity between the wire and foil. The limited thermal movement of the wire with the film creates white line appearance around the wire of certain cell and wire position when modules experience mechanical weathering. (Figure 1).<\/p>\n
![\"white](\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/07\/rec-white-lines.jpg\")
<\/p>\n
<\/p>\n
Module performance assessment confirms no impact to functionality<\/strong><\/p>\n <\/p>\n
The foil coverage and wire solder profile are comparable on both areas with and without white line based on optical and scanning electron microscope (SEM) result. Hence, the white line visual appearance does not affect wire connection to cell finger nor affect the current flow when the panel is in operating mode. The EL image does not show dark area at the wire position that observed white line. This shows that current is flowing normally from the cell through the fingers and into the wire. This validates that the white line is a visual artifact that has no effect on module’s functionality.<\/p>\n
<\/p>\n
Conclusion<\/strong><\/p>\n <\/p>\n
The white line along wire is a visual artefact that is resulted from interaction between wire and foil from difference in material thermal conductivity and as such the extent of white line varies from module to module. Cross sectional optical and SEM inspections with tests have also shown that white line visual appearance has no effect on the power, performance or reliability of the module.<\/p>\n
<\/p><\/blockquote>\n
Tom said it was good to get confirmation from REC that the occurrence doesn’t represent a safety problem (like hotspots) or panel performance issue. Despite the responsive support from REC, Tom reached out to us more out of interest; he was wondering if we have heard of this occurrence or whether installers in the SolarQuotes network had provided feedback regarding these REC Alpha busbar white lines.<\/p>\n
We haven’t seen any like it, though I haven’t checked Finn’s array of REC Alpha 405s on his house. Finn did send up his drone to look for any obvious defects on his 2.5-storey roof, and the 6-month-old panels had no obvious visual defects – apart from bird shit. Admittedly we don\u2019t have an electron microscope or the smarts to operate one if we want to check them in detail.<\/p>\n
None of the white marks on Tom’s panels are as pronounced as the photograph from REC. However, he\u2019ll be chasing them for a replacement if the marks become this prominent. REC market their Alpha as a premium panel and they\u2019re certainly priced as such. Having them side by side with 11 x 415W Trina Vertex S+ panels installed to expand his system, the Trinas look better than the REC Alpha panels.<\/p>\n
Hopefully, this post is a reminder that whether they’re the cheapest or the most expensive, it’s worth having your panels looked over occasionally. In fact, if you read the fine print of your connection agreement, the network company probably mandates an electrical inspection at least every 5 years.<\/p>\n
There’s a lament about the bitter taste of expensive products fading after the sweetness of cheap…. oh no, that’s not right, is it?<\/p>\n
Let’s content ourselves with the excellent customer service and the REC assurance this issue raised by Tom is merely a cosmetic one. And we’ll keep a sharp eye on the monitoring for the next few years to ensure the yield stacks up.<\/p>\n
If you’d like to track them yourself, you can follow the progress here, with all the other enthusiasts at PVOutput.org.<\/a><\/p>\n![\"\"](\"https:\/\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/06\/PVOutput.jpg\")
<\/p>\n
This is a good use for the Internet of Things: pushing data from your solar to an independent monitoring platform where you can record and compare output over time and with other systems locally and worldwide.<\/p>\n
\n\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
Recently we fielded a query from a Western Australian gent who was curious about a special extra detail he’d noticed in the premium products bought from a recommended installer.<\/p>\n","protected":false},"author":28,"featured_media":76566,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[46],"tags":[],"class_list":["post-75659","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-panels-2","entry"],"acf":[],"yoast_head":"\n
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One of the Alpha Pure's claims to fame\u2026","rel":"","context":"In "General Solar & Storage News"","block_context":{"text":"General Solar & Storage News","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-battery-news\/"},"img":{"alt_text":"REC Alpha Pure-R Series solar panels","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/05\/rec-alpha-pure-r.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/05\/rec-alpha-pure-r.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/05\/rec-alpha-pure-r.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/05\/rec-alpha-pure-r.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/05\/rec-alpha-pure-r.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":30535,"url":"https:\/\/www.solarquotes.com.au\/blog\/rec-alpha-series-panels-mb1066\/","url_meta":{"origin":75659,"position":1},"title":"REC Unveils Alpha Series Solar Panels – Up To 380 Watts","author":"Michael Bloch","date":"May 23, 2019","format":false,"excerpt":"Last week REC Group unveiled its much-hyped Alpha Series solar panels, which the company says includes the highest power 60-cell module in the world. Describing the modules as a \"beautiful solar panel with beast levels of power\" REC says the Alpha Series will be available in up to 380 Watts\u2026","rel":"","context":"In "General Solar & Storage News"","block_context":{"text":"General Solar & Storage News","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-battery-news\/"},"img":{"alt_text":"REC Alpha Series solar panels","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/05\/rec-alpha-series.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/05\/rec-alpha-series.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/05\/rec-alpha-series.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/05\/rec-alpha-series.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2019\/05\/rec-alpha-series.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":79399,"url":"https:\/\/www.solarquotes.com.au\/blog\/rec-alpha-pure-rx\/","url_meta":{"origin":75659,"position":2},"title":"REC Alpha Pure-RX: 470W Of High-Voltage, Low-Current Goodness","author":"Anthony Bennett","date":"October 20, 2023","format":false,"excerpt":"Prominent Singapore-headquartered PV module manufacturer REC has dropped the specifications of its latest line of residential solar panels, the REC Alpha Pure-RX Series. The \"pure\" part of this name refers to the panels being lead-free. Using heterojunction cell technology (HJT), these modules represent yet another significant step in residential solar\u2026","rel":"","context":"In "Solar Panels"","block_context":{"text":"Solar Panels","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-panels-2\/"},"img":{"alt_text":"REC Alpha Pure RX solar panel","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/10\/rec-alpha-pure-rx-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/10\/rec-alpha-pure-rx-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/10\/rec-alpha-pure-rx-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/10\/rec-alpha-pure-rx-1.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/10\/rec-alpha-pure-rx-1.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":50473,"url":"https:\/\/www.solarquotes.com.au\/blog\/rec-twinpeak-4-mb2004\/","url_meta":{"origin":75659,"position":3},"title":"REC Launches TwinPeak 4 Solar Panels","author":"Michael Bloch","date":"May 20, 2021","format":false,"excerpt":"Solar panel manufacturer REC has announced the 4th generation of its TwinPeak series is starting production this month and will be potentially available from July\/August. REC's TwinPeak series has been around since 2014 - and when you're on a good thing, you stick to it. The company says the TwinPeak\u2026","rel":"","context":"In "General Solar & Storage News"","block_context":{"text":"General Solar & Storage News","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-battery-news\/"},"img":{"alt_text":"REC TwinPeak 4 solar panels","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/05\/rec-twinpeak-4.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/05\/rec-twinpeak-4.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/05\/rec-twinpeak-4.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/05\/rec-twinpeak-4.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/05\/rec-twinpeak-4.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":41068,"url":"https:\/\/www.solarquotes.com.au\/blog\/rec-alpha-intersolar-mb1588\/","url_meta":{"origin":75659,"position":4},"title":"REC Scores Intersolar Award 2020 For Alpha\u00a0","author":"Michael Bloch","date":"July 3, 2020","format":false,"excerpt":"The REC Alpha solar panel has won an Intersolar Award in the photovoltaics category, the second time REC Group has won the coveted award. The Alpha was unveiled with much fanfare in May last year, with REC claiming it to be the highest power 60-cell solar panel in the world\u2026","rel":"","context":"In "General Solar & Storage News"","block_context":{"text":"General Solar & Storage News","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-battery-news\/"},"img":{"alt_text":"REC Alpha solar panel","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/07\/rec-alpha-series.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/07\/rec-alpha-series.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/07\/rec-alpha-series.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/07\/rec-alpha-series.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/07\/rec-alpha-series.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":70601,"url":"https:\/\/www.solarquotes.com.au\/blog\/rec-solar-warranties\/","url_meta":{"origin":75659,"position":5},"title":"A Deep Dive Into REC Solar Panel Warranties","author":"Ronald Brakels","date":"February 15, 2023","format":false,"excerpt":"REC produces premium solar panels. That means they're not cheap, but they are high quality.\u00a0 The company was Norwegian, but its headquarters are now in Singapore, along with its sole factory.\u00a0 This article will be a deep dive into REC solar panel warranties.\u00a0 I've already put on a wetsuit and\u2026","rel":"","context":"In "Solar Panels"","block_context":{"text":"Solar Panels","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-panels-2\/"},"img":{"alt_text":"A deep dive into the warranty for REC solar panels","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/02\/deep-dive-rec-warranty.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/02\/deep-dive-rec-warranty.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/02\/deep-dive-rec-warranty.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/02\/deep-dive-rec-warranty.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2023\/02\/deep-dive-rec-warranty.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/75659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/comments?post=75659"}],"version-history":[{"count":15,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/75659\/revisions"}],"predecessor-version":[{"id":76568,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/75659\/revisions\/76568"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media\/76566"}],"wp:attachment":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media?parent=75659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/categories?post=75659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/tags?post=75659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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