{"id":4733,"date":"2015-11-10T16:56:44","date_gmt":"2015-11-10T14:56:44","guid":{"rendered":"https:\/\/www.victronenergy.com\/blog\/?p=4733"},"modified":"2016-06-27T14:41:50","modified_gmt":"2016-06-27T12:41:50","slug":"connecting-different-sized-victron-energy-pv-modules-series-or-parallel","status":"publish","type":"post","link":"https:\/\/www.victronenergy.com\/blog\/2015\/11\/10\/connecting-different-sized-victron-energy-pv-modules-series-or-parallel\/","title":{"rendered":"Connecting different sized Victron Energy PV modules: Series or Parallel?"},"content":{"rendered":"

Most Victron Energy technical questions are answered by Victron Energy dealers or by contacting Victron Energy customer service on +31(0)36 5359703<\/a> or emailing them at\u00a0 service@victronenergy.com<\/a>. Others get answered here on the blog and on Victron Live<\/a>, using the Disqus comments section.<\/p>\n

Sometimes the sales team receive them directly too. Here is one question received by Bob Hopman about whether you can place different sized Victron Energy PV modules together and whether series or parallel is best. I found this one interesting, hence a short blog.<\/p>\n

John Rushworth<\/p>\n

<\/p>\n

Question by an Australian customer<\/strong><\/p>\n

Subject:<\/b> Victron MPPT question<\/p>\n

Bob,<\/p>\n

I hope you don\u2019t mind a silly question. I have a Victron MPPT 75\/15. On the roof of my camper van is a 100 Watt solar panel, which is wired into the MPPT.<\/p>\n

That\u2019s all great, however sometimes at camp, I\u2019d like to also wire in a completely separate solar panel (a ground standing one) directly into the MPPT but not in parallel – just 2 sets of DC leads from the respective panels to the MPPT.<\/p>\n

Is this possible or OK to do?<\/p>\n

Its an otherwise simple system<\/p>\n

Thanks.<\/p>\n

Brad.<\/p>\n

Answer by Bob Hopman<\/strong><\/p>\n

Subject:<\/b> Re: Victron MPPT question<\/p>\n

Dear Brad,<\/p>\n

This isn\u2019t a silly question.<\/p>\n

There are a couple of things to keep in mind!<\/p>\n

Placing different modules in series is possible as long as the open circuit voltage (Voc) does not reach the maximum of the MPPT at cold temperatures.<\/p>\n

A few things to note first. Our\u00a0MPPT Calculator excel sheet<\/a> does not allow different types of modules in series, so be careful with that. Please also note that damaging the MPPT by applying too high a voltage invalidates the warranty.<\/p>\n

There are advantages\/ disadvantages for placing them in series or in parallel. Please look at the following image, where I took 2 imaginary PV modules and placed them in series and in parallel:<\/p>\n

\"Series<\/div><\/a><\/p>\n

You can see, in this case it would make more sense to place them in series, because the voltages are added and the lowest current of both modules will define the maximum current of the system.<\/p>\n

While placing them in parallel you can see a different story, currents are added and the lowest voltage will determine the \u2018PV system\u2019 voltage => which in this example results in a lower output power.<\/p>\n

If the current would exceed the maximum of 15A, this would not damage the Victron MPPT. To understand this unique feature see my blog: Matching solar modules to MPPT charge controllers<\/a><\/p>\n

Of course if you combine two different modules in a system, it will be more difficult for the MPPT to find the optimum maximum power point, but it would work!<\/p>\n

So it really depends on the modules which you would like to combine in the system – although my best advice is to always keep the system robust and use the same size\/wattage of Victron Energy PV modules.<\/p>\n

Safety note: I’d never advise to do this in a working ‘live’ system. Always correctly disconnect the battery and panels (and if applicable loads) before changing anything.<\/p>\n

I hope this answered your question.<\/p>\n

Good luck with your PV system!<\/p>\n

Kind regards,<\/p>\n

Bob Hopman<\/a>
\nSales Manager
\nVictron Energy B.V<\/p>\n

\"Victron<\/div><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Most Victron Energy technical questions are answered by Victron Energy dealers or by contacting Victron Energy customer service on +31(0)36 5359703 or emailing them at\u00a0 service@victronenergy.com. Others get answered here on the blog and on Victron Live, using the Disqus comments section. Sometimes the sales team receive them directly too. Here is one question received […]<\/p>\n","protected":false},"author":5,"featured_media":4735,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[126],"tags":[],"class_list":["post-4733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles"],"acf":[],"yoast_head":"\nConnecting different sized Victron Energy PV modules: Series or Parallel? - Victron Energy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.victronenergy.com\/blog\/2015\/11\/10\/connecting-different-sized-victron-energy-pv-modules-series-or-parallel\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Connecting different sized Victron Energy PV modules: Series or Parallel? - Victron Energy\" \/>\n<meta property=\"og:description\" content=\"Most Victron Energy technical questions are answered by Victron Energy dealers or by contacting Victron Energy customer service on +31(0)36 5359703 or emailing them at\u00a0 service@victronenergy.com. 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Others get answered here on the blog and on Victron Live, using the Disqus comments section. Sometimes the sales team receive them directly too. Here is one question received [\u2026]","subtitle":null,"related_posts":[{"id":26623,"slug":"new-vrm-solar-production-forecast-feature","title":"Introducing Solar Production Forecast","link":"https:\/\/www.victronenergy.com\/blog\/2023\/07\/05\/new-vrm-solar-production-forecast-feature\/","excerpt":"We are excited to announce the launch of a new feature for VRM - Solar Forecasts. This feature combines a model of your sites solar production potential with irradiance forecasting data from Solcasts global fleet of weather satellites.\u00a0 [video width=\"1280\" height=\"720\" mp4=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2023\/07\/solcast_232349675.mp4\" poster=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2023\/07\/solcast_232349811.jpg\" loop=\"true\" autoplay=\"true\" preload=\"auto\"][\/video] The Solcast network provides 600 million new irradiance forecasts…","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2023\/07\/solar-estimate-overview_232350203-150x150.png","author_name":"Guy Stewart","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/guystewart\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/46f1d045a4e399c7c754f765b33d48ca13b2ff31beca5a200d86e7c1d7b8d6d5?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/46f1d045a4e399c7c754f765b33d48ca13b2ff31beca5a200d86e7c1d7b8d6d5?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/46f1d045a4e399c7c754f765b33d48ca13b2ff31beca5a200d86e7c1d7b8d6d5?s=96&d=mm&r=g&s=96"},"categories":[{"name":"News","link":"https:\/\/www.victronenergy.com\/blog\/category\/news\/"},{"name":"Technical articles","link":"https:\/\/www.victronenergy.com\/blog\/category\/technical-articles\/"}],"date":"2023-07-05T14:03:29+02:00","date_gmt":"2023-07-05T12:03:29+00:00"},{"id":22392,"slug":"teaching-renewables-in-croatia","title":"Teaching Renewables in Croatia","link":"https:\/\/www.victronenergy.com\/blog\/2021\/03\/23\/teaching-renewables-in-croatia\/","excerpt":"Right across central Europe Schrack Technik\u00a0provide energy solutions to industry, home and the Electric Vehicle market. They educate customers about the advantages of Solar - and also provide demonstration mobile energy installations for the classroom. In this article\u00a0Josip Zdenkovi\u0107 (PH.D \/ M.Sc. E.E.) manager of\u00a0Schrack Technik, \u00a0Zagreb, Croatia - tells us what his team is…","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2021\/03\/Slide6_159135079-150x150.jpg","author_name":"justin","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/justin\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=96"},"categories":[{"name":"Technical articles","link":"https:\/\/www.victronenergy.com\/blog\/category\/technical-articles\/"},{"name":"Users stories","link":"https:\/\/www.victronenergy.com\/blog\/category\/users-stories\/"}],"date":"2021-03-23T09:43:54+02:00","date_gmt":"2021-03-23T07:43:54+00:00"},{"id":21521,"slug":"how-to-install-a-multiplus-inverter-charger","title":"How to Install a MultiPlus Inverter\/Charger?","link":"https:\/\/www.victronenergy.com\/blog\/2020\/10\/30\/how-to-install-a-multiplus-inverter-charger\/","excerpt":"Peter Kennedy is an experienced Victron Dealer\/Installer specialising in Marine applications. His company website PKYS carries a useful guide to installing a MultiPlus Inverter. In it Peter adds a whole world of information to the Victron Energy MultiPlus installation manual. He discusses the practicalities of installing a MultiPlus Inverter in compliance with the standards of…","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2020\/10\/Peter_147808080-scaled-e1604315019237-150x129.jpg","author_name":"justin","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/justin\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/dc1aee15dc88b16fe8302452197d07d203697be68b3ea32d831473d70ae3026b?s=96&d=mm&r=g&s=96"},"categories":[{"name":"Technical articles","link":"https:\/\/www.victronenergy.com\/blog\/category\/technical-articles\/"}],"date":"2020-10-30T09:52:13+02:00","date_gmt":"2020-10-30T07:52:13+00:00"}],"_links":{"self":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/4733","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/comments?post=4733"}],"version-history":[{"count":23,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/4733\/revisions"}],"predecessor-version":[{"id":4758,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/4733\/revisions\/4758"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/media\/4735"}],"wp:attachment":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/media?parent=4733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/categories?post=4733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/tags?post=4733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}