{"id":53964,"date":"2021-09-16T06:52:03","date_gmt":"2021-09-15T20:22:03","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=53964"},"modified":"2021-09-16T06:52:03","modified_gmt":"2021-09-15T20:22:03","slug":"microinverters-heat-tolerance-mb2158","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/microinverters-heat-tolerance-mb2158\/","title":{"rendered":"Can Microinverters Take The Heat?"},"content":{"rendered":"

\"Microinverter<\/p>\n

A black box of electronics sitting beneath a solar panel baking in the hot Australian summer sun. How do microinverters hold up in Australia’s scorching summers?<\/p>\n

A little while back I received an email from someone who recently had a solar power system installed, and while researching solar inverters<\/a> prior to the purchase was tossing up whether to install a single string inverter or micro-inverters.<\/p>\n

A string inverter is the most common choice – generally one per installation, with strings of solar panels connected to it (hence the name). It’s usually installed on the wall beside a home’s switchboard\/meter.<\/p>\n

A microinverter<\/a>\u00a0 is much smaller device and one is used per panel. It’s attached to the racking below the panel, or in the case of an AC solar panel it’s factory-integrated and takes the place of the junction box on the back of the module. Microinverters offer a number of benefits, including enhanced system design flexibility and safety, redundancy and panel level monitoring – but they add to system cost.<\/p>\n

Anyhow, this fellow ended up opting for a single string inverter – one of his concerns being the temperature microinverters will have to endure during Sydney summers, which can get pretty toasty; particularly out west.<\/p>\n

Some Like<\/span> Tolerate It Hot<\/h2>\n

While this may not apply to all devices of this nature, Enphase microinverters<\/a> are built to take the heat.\u00a0The company says they can withstand up to 65\u00b0C ambient (air) temperature and 85\u00b0C internal operating temperature.<\/p>\n

While it doesn’t reach 65\u00b0C anywhere in Australia1<\/a><\/sup>, temperatures in the space between the solar panel and the roof 2<\/a><\/sup> can be higher than official temperature readings, which are often taken by a thermometer inside a box called a Stevenson screen<\/a>. This is a ventilated wooden box that protects instruments from direct heat radiation from outside sources.<\/p>\n

There’s also the heat generated by the microinverter itself, which plays a bigger role on internal temperature. Enphase says based on 97% efficiency, for a 5kW string inverter running at maximum capacity 150W of heat must be dissipated. For a microinverter running at 300W, only 9W of heat needs to be dissipated. Additionally, Enphase microinverters have a significant amount of surface area to dissipate heat\u00a0 (IQ7+ = 212 mm x 175 mm x 30.2 mm).<\/p>\n

Enphase has evidence from the field on how its microinverters fare in extreme heat conditions. The following data is based on what the company says were the hottest days in Australian capitals last year (sourced from the Bureau of Meteorology) and the corresponding maximum internal temperature of the Enphase microinverters, which was grabbed from Enlighten servers – the company’s solar monitoring system.<\/p>\n

\n\n\n\n\n\n\n\n\n
Date<\/strong><\/td>\nLocation<\/strong><\/td>\nMax ambient<\/strong>
\ntemp<\/strong><\/td>\n		Max microinverter<\/strong>
\ntemp<\/strong><\/td>\n<\/tr>\n
4 Jan 2020<\/td>\nPenrith<\/td>\n48.9\u00b0C<\/td>\n63\u00b0C<\/td>\n<\/tr>\n
31 Jan 2020<\/td>\nMelbourne<\/td>\n42.9\u00b0C<\/td>\n64\u00b0C<\/td>\n<\/tr>\n
30 Jan 2020<\/td>\nAdelaide<\/td>\n43.9\u00b0C<\/td>\n70\u00b0C<\/td>\n<\/tr>\n
4 Feb 2020<\/td>\nPerth<\/td>\n42.7\u00b0C<\/td>\n68\u00b0C<\/td>\n<\/tr>\n
6 Dec 2020<\/td>\nBrisbane<\/td>\n43.5\u00b0C<\/td>\n52\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

There are some interesting\/curious results in that table. For example, the highest internal temperature recorded was in Adelaide, yet the highest ambient temperature was in Penrith, Sydney by quite a margin – and what a stinker of a day that was for Penrith folks. In fact, it was claimed to be the hottest place in the world on that day.<\/p>\n

So, what gives?\u00a0 The company’s explanation is hot days can be cloudy and windy. This means less power generation, better cooling, and lower internal temperatures. Enphase indicates<\/a> on the hottest day at the Adelaide site, it was pretty sunny. It doesn’t mention the conditions in Penrith. And the Brisbane data looks a bit iffy – it looks like the maximum temperature on that day was 33.2\u00b0C<\/a>.<\/p>\n

That aside, it’s worth noting in none of the examples did the microinverters get even close to the maximum internal operating temperature of 85\u00b0C.<\/p>\n

Enphase has a fair bit riding on its confidence in these microinverters being able to withstand hot days over a long period given the company offers a 10-year product warranty in Australia.<\/p>\n","protected":false},"excerpt":{"rendered":"

A black box of electronics sitting beneath a solar panel baking in the hot Australian summer sun. How do microinverters hold up in Australia’s scorching summers?<\/p>\n","protected":false},"author":17,"featured_media":53965,"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":[678],"tags":[],"class_list":["post-53964","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-battery-news","entry"],"acf":[],"yoast_head":"\nCan Microinverters Take The Heat? - SolarQuotes Blog<\/title>\n<meta name=\"description\" content=\"A black box of electronics sitting beneath a solar panel baking in the hot Australian summer sun. 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A solar inverter is the real workhorse of a solar power system - all the electricity generated by the system's solar panels is routed\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":"Enphase microinverter - Penrith Solar","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/04\/penrith-solar-microinverters.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/04\/penrith-solar-microinverters.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/04\/penrith-solar-microinverters.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/04\/penrith-solar-microinverters.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2021\/04\/penrith-solar-microinverters.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":38771,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-panel-optimisation-mb1475\/","url_meta":{"origin":53964,"position":1},"title":"Is Solar Panel Optimisation Worth It?","author":"Michael Bloch","date":"April 7, 2020","format":false,"excerpt":"Solar string inverters, micro-inverters and power optimizers. What's the best choice? Finn offers his point of view in this video (transcript included). Transcript begins :- There are three main components in a solar PV system - the panels, the racking\/mounting, and the inverter. This video focuses on the inverter, whose\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":"Solar panel optimisation","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/04\/solar-panel-optimisation.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/04\/solar-panel-optimisation.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/04\/solar-panel-optimisation.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/04\/solar-panel-optimisation.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2020\/04\/solar-panel-optimisation.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":59473,"url":"https:\/\/www.solarquotes.com.au\/blog\/string-vs-micro-inverters-study\/","url_meta":{"origin":53964,"position":2},"title":"Microinverters Perform No Better Than String Inverters: French Study","author":"Ronald Brakels","date":"March 28, 2022","format":false,"excerpt":"If you asked me what type of inverter your rooftop solar system should use: A string inverter -- like most solar systems in Australia, or... Microinverters -- a little baby inverter that goes under each panel. I would say... \"Go with whichever you like.\u00a0 Unless there are special circumstances it\u2026","rel":"","context":"In "Solar Inverters"","block_context":{"text":"Solar Inverters","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-inverters\/"},"img":{"alt_text":"String vs. micro inverters","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/03\/micro-vs-string.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/03\/micro-vs-string.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/03\/micro-vs-string.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/03\/micro-vs-string.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2022\/03\/micro-vs-string.png?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":4849,"url":"https:\/\/www.solarquotes.com.au\/blog\/microinverters-vs-dc-optimisers-which-option-is-best\/","url_meta":{"origin":53964,"position":3},"title":"Microinverters Vs. Dc Optimisers: Which option is best?","author":"Finn Peacock","date":"June 24, 2015","format":false,"excerpt":"Good grief this article is going to get me into trouble with some solar installers.\u00a0 Why? Because by the end of it I will give my humble opinion on whether microinverters\u00a0(e.g. Enphase) are better\u00a0than DC optimisers (e.g. SolarEdge or Tigo). Please let me be very clear. This article is not\u2026","rel":"","context":"In "Solar Inverters"","block_context":{"text":"Solar Inverters","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-inverters\/"},"img":{"alt_text":"optimisers and microinverters","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2015\/06\/optimisers-vs-microinverters2.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2015\/06\/optimisers-vs-microinverters2.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2015\/06\/optimisers-vs-microinverters2.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":21613,"url":"https:\/\/www.solarquotes.com.au\/blog\/solar-panel-optimisation\/","url_meta":{"origin":53964,"position":4},"title":"Solar Panel Optimisation: Micro inverters, DC Optimisers, AC Solar Panels & Maxim Explained.","author":"Finn Peacock","date":"May 25, 2018","format":false,"excerpt":"Solar Panel Optimisation is an extra feature you can pay for when buying solar that optimises the power output from each panel independently. This feature can also be called: Panel Level Optimisaton (PLO) and Module Level Power Electronics (MLPE) For the rest of this post, I'll simply call it PLO.\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":"","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/05\/solar-panel-optimisation.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/05\/solar-panel-optimisation.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/05\/solar-panel-optimisation.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/05\/solar-panel-optimisation.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2018\/05\/solar-panel-optimisation.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":5507,"url":"https:\/\/www.solarquotes.com.au\/blog\/cheaper-microinverters-plan\/","url_meta":{"origin":53964,"position":5},"title":"Enphase’s Cunning Plan: Make Micro Inverters Cheaper than String Inverters.","author":"Ronald Brakels","date":"April 14, 2016","format":false,"excerpt":"When it comes to Australian solar installations, conventional string inverters tower over the competition like a current converting colossus. But microinverters, which are tiny in both physical size and market share, are shaping up to beat string inverters on both price and reliability. Enphase, the world's largest producer of microinverters,\u2026","rel":"","context":"In "Solar Inverters"","block_context":{"text":"Solar Inverters","link":"https:\/\/www.solarquotes.com.au\/blog\/category\/solar-inverters\/"},"img":{"alt_text":"enphase costs: half price by 2017","src":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2016\/04\/enphase-cost.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2016\/04\/enphase-cost.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.solarquotes.com.au\/blog\/wp-content\/uploads\/2016\/04\/enphase-cost.jpg?resize=525%2C300 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/53964","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\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/comments?post=53964"}],"version-history":[{"count":9,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/53964\/revisions"}],"predecessor-version":[{"id":53974,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/posts\/53964\/revisions\/53974"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media\/53965"}],"wp:attachment":[{"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/media?parent=53964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/categories?post=53964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solarquotes.com.au\/blog\/wp-json\/wp\/v2\/tags?post=53964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}