{"id":3916,"date":"2015-08-28T16:08:15","date_gmt":"2015-08-28T14:08:15","guid":{"rendered":"https:\/\/www.victronenergy.com\/blog\/?p=3916"},"modified":"2016-06-27T14:51:13","modified_gmt":"2016-06-27T12:51:13","slug":"ve-bus-firmware-400-a-major-step-forward","status":"publish","type":"post","link":"https:\/\/www.victronenergy.com\/blog\/2015\/08\/28\/ve-bus-firmware-400-a-major-step-forward\/","title":{"rendered":"VE.Bus firmware 400: A major step forward"},"content":{"rendered":"<p><strong>Update 4 sept 2015:\u00a0<\/strong>Latest version is currently 401. Version 400 had an issue with the virtual switch\/ignore ac input, fixed in version 401.<\/p>\n<p>Great news: we have released VE.Bus firmware 400!\u00a0A\u00a0major step forward in simplifying working with Multis, Inverters and Quattros. Virtual Switch and Assistants functionality are now combined in one firmware version.\u00a0Choosing between the two is now a simple selection instead of\u00a0uploading a new\u00a0firmware. To use the Assistants, disable the Virtual Switch:<!--more--><\/p>\n<h3><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/2015\/08\/virtualswitch-assistants.png\" target=\"_blank\"><div class=\"full-size-image container\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-3949\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/2015\/08\/virtualswitch-assistants.png\" alt=\"virtualswitch-assistants\" width=\"443\" height=\"306\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2015\/08\/virtualswitch-assistants.png 443w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2015\/08\/virtualswitch-assistants-300x207.png 300w\" sizes=\"auto, (max-width: 443px) 100vw, 443px\" \/><\/div><\/a><\/h3>\n<h3>Delivery of products with Version 400<\/h3>\n<p>The new version will be introduced in production in the coming weeks. As soon as the existing stock has been sold, our Multis and Quattros will be shipped with firmware Version 400 installed which can then be used with Assistants out of the box. This means\u00a0that the first models with 400 will be shipped to customers within a few months. Other models, with more stock compared to the monthly shipped quantity might take longer.<\/p>\n<h3>Change log (compared to 307)<\/h3>\n<ul>\n<li>Added loss of mains detection, certain models are already certified in the UK! See the PDF declarations of conformity on <a href=\"https:\/\/www.victronenergy.com\/inverters-chargers\/multiplus-12v-24v-48v-800va-3kva#declaration-of-conformity\" target=\"_blank\">this page<\/a><\/li>\n<li>Virtual Switch and Assistants functionality combined in one: no more changing of firmware with VEFlash to work with Assistants<\/li>\n<li>Fixed bug that caused shutdowns on certain 3 phase Hub2-v3 systems<\/li>\n<li>Re-added dip switch configuration<\/li>\n<li>Fixed bug: during battery charge, the Multi regularly switched to Bypass for a few seconds.\u00a0(Bug was introduced in 26xx308)<\/li>\n<li>Completed support for <a href=\"https:\/\/www.victronenergy.com\/live\/system_integration:hub4_grid_parallel-ccgx_control_loop\" target=\"_blank\">Hub-4 type installations<\/a><\/li>\n<\/ul>\n<h3>From then till now<\/h3>\n<p>A\u00a0bit of history to explain where we came from and why the 400 firmware is such a major step forward:<\/p>\n<p>In the beginning, many, many years ago, our Multis were already quite flexible in their configuration. Battery type, output frequency and much more could be configured with VEConfigure, the PC application. But we wanted more and quite early on\u00a0we added the &#8216;Virtual Switch&#8217;. A configurable potential free contact that can, for example, be used to automatically start and stop\u00a0a generator based on the battery state of charge and AC load. Besides controlling the potential free contact it is also possible to control the behaviour of the inverter\/charger, for example force it to inverter mode in certain conditions.<\/p>\n<p>The Virtual Switch was, and still is, a huge selling point to choose and use our inverter\/chargers. Several\u00a0years back we wanted to do even more but the Virtual Switch could no longer do all that we wanted. This is why we\u00a0came up with the `<a href=\"https:\/\/www.victronenergy.com\/live\/assistants:start\" target=\"_blank\">Assistants<\/a>`. A very powerful mechanism that added more flexibility and control. Used for self-consumption systems, and also for many other more complex installations, the Assistants often reduce the cost and complexity because they eliminate the need\u00a0to add an external PLC or another control device. One drawback though: to use Assistants, one had to\u00a0change the firmware in the unit. And that is where technical names came in: 1xx firmware versions were used for Virtual Switch, and 2xx firmware versions were used for Assistants. There is even a whole document, to explain about all the different firmware types and when to use which one: <a href=\"https:\/\/www.victronenergy.com\/upload\/documents\/manual-VE.Bus-firmware-versions-explained-EN.pdf\" target=\"_blank\">VE.Bus firmware versions explained<\/a>.<\/p>\n<p>And the same story continues: a little bit later on we wanted to do more with Assistants. That could be done, but only on recently manufactured units since they had a newer microprocessor which allowed for more code and logic to be programmed into the unit. For this we added yet another firmware version: 3xx. So this is how we ended up:<\/p>\n<p>1xx firmware versions are with virtual switch, available for both old and new microprocessor<br \/>\n2xx firmware versions are with Assistants, available for both old and new microprocessor<br \/>\n3xx firmware versions are with Assistants, available for new microprocessors only<\/p>\n<p>Quite powerful, though\u00a0complex to explain, understand and a lot of hassle when you want to change a configuration from Virtual Switch to Assistants.<\/p>\n<h3>Simplified solution<\/h3>\n<p>This complexity detailed above is now solved and improved in version 400, as both options are possible in the same firmware. Therefore we can use it in manufacturing and as a consequence save a lot of time during installations, as it is no longer necessary to always use VEFlash for installations that require Assistants. For new installations, one can forget all about 1xx, 2xx and 3xx: only 4xx firmwares will be used.<\/p>\n<p>Note that most of the advantages will only become apparent once we start shipping our products with firmware version 400.<\/p>\n<h3>Dip switches re-added for simple installations without using a laptop<\/h3>\n<p>Early on when we started with Assistants, we had to take out the dip switch functionality to create space for the Assistants. Most more complex configurations are made using laptops anyway. But still now and then it can be very convenient\u00a0to configure a Multi in a simple installation without having to bring a laptop. With the release of firmware version 400 we have re-added a -simplified- version of the dip switch configuration back in to the firmware. They can be used to configure these settings without the use of a laptop:<\/p>\n<ul>\n<li>Input current limit<\/li>\n<li>AES<\/li>\n<li>Inverter output voltage<\/li>\n<li>Inverter frequency<\/li>\n<li>Charge Current<\/li>\n<li>Absorption voltage<\/li>\n<li>Float voltage<\/li>\n<li>Absorption duration<\/li>\n<li>Charge curve<\/li>\n<li>Dynamic current limiter<\/li>\n<li>UPS function (will not have any effect if a grid code is active)<\/li>\n<\/ul>\n<h3>Other compatibility notes<\/h3>\n<ul>\n<li>Digital Multi Control is compatible<\/li>\n<li>The Color Control GX is compatible (use <a href=\"https:\/\/www.victronenergy.com\/blog\/2015\/08\/16\/color-control-gx-v1-27-firmware-released\/\" target=\"_blank\">latest firmware<\/a>)<\/li>\n<li>Victron Global Remote and Victron Ethernet Remote are compatible, but the MK2 used does need an upgrade. See <a href=\"https:\/\/www.victronenergy.com\/upload\/documents\/manual-VE.Bus-firmware-versions-explained-EN.pdf\" target=\"_blank\">this document for instructions<\/a>.<\/li>\n<li>Blue Power Panel 2 is not yet compatible with version 400. Use the latest 1xx version instead<\/li>\n<li>VE.Bus to NMEA2000 interface is compatible, note that it requires firmware version v2.10 or later<\/li>\n<li>VE.Bus to VE.Can interface is compatible, note that it requires firmware version v2.10 or later<\/li>\n<li>There are three\u00a0Assistants that need an update before they can be used on 400 firmware versions: the PV Inverter Assistant, the VE.Bus BMS Assistant and the Lynx Ion BMS Assistant. These will be ready\u00a0next week. After that there are no reasons left to revert to the 2xx firmware, other than when working with older systems having the old microprocessor.<\/li>\n<\/ul>\n<p>So to conclude this rather lengthy text, version 400\u00a0is a good\u00a0step out of what I have jokingly called our &#8216;firmware swamp&#8217;. And it is part of a larger process to simplify easy of use and configuration of our products, without having to sacrifice the enormous flexibility we can offer.<\/p>\n<p>I wish you a good weekend!<\/p>\n<p>Matthijs<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Update 4 sept 2015:\u00a0Latest version is currently 401. Version 400 had an issue with the virtual switch\/ignore ac input, fixed in version 401. Great news: we have released VE.Bus firmware 400!\u00a0A\u00a0major step forward in simplifying working with Multis, Inverters and Quattros. Virtual Switch and Assistants functionality are now combined in one firmware version.\u00a0Choosing between the [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":3940,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[124],"tags":[],"class_list":["post-3916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-firmware-software"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>VE.Bus firmware 400: A major step forward - 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\/08\/28\/ve-bus-firmware-400-a-major-step-forward\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"VE.Bus firmware 400: A major step forward - Victron Energy\" \/>\n<meta property=\"og:description\" content=\"Update 4 sept 2015:\u00a0Latest version is currently 401. Version 400 had an issue with the virtual switch\/ignore ac input, fixed in version 401. Great news: we have released VE.Bus firmware 400!\u00a0A\u00a0major step forward in simplifying working with Multis, Inverters and Quattros. 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Version 400 had an issue with the virtual switch\/ignore ac input, fixed in version 401. Great news: we have released VE.Bus firmware 400!\u00a0A\u00a0major step forward in simplifying working with Multis, Inverters and Quattros. Virtual Switch and Assistants functionality are now combined in one firmware version.\u00a0Choosing between the [\u2026]","subtitle":null,"related_posts":[{"id":33057,"slug":"introducing-victron-microgrid","title":"Introducing Victron Microgrid","link":"https:\/\/www.victronenergy.com\/blog\/2026\/04\/13\/introducing-victron-microgrid\/","excerpt":"What if you could build large off-grid systems with the same simplicity as small ones - just by adding more independent units, increasing reliability, and scaling total capacity as you grow? Large off-grid systems have traditionally been complex to build and difficult to change; Victron Microgrid takes a different approach. Victron Microgrid allows multiple independent&hellip;","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2026\/04\/Victron-Microgrid-cover_319925212-150x150.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":"Firmware & Software","link":"https:\/\/www.victronenergy.com\/blog\/category\/firmware-software\/"},{"name":"News","link":"https:\/\/www.victronenergy.com\/blog\/category\/news\/"},{"name":"Products","link":"https:\/\/www.victronenergy.com\/blog\/category\/products\/"}],"date":"2026-04-13T13:15:09+02:00","date_gmt":"2026-04-13T11:15:09+00:00"},{"id":32812,"slug":"introducing-venus-os-3-70","title":"Introducing Venus OS 3.70","link":"https:\/\/www.victronenergy.com\/blog\/2026\/02\/25\/introducing-venus-os-3-70\/","excerpt":"Victron GX device firmware v3.70 is now available. This release brings a greatly expanded switch pane with Node-RED virtual switches, improvements to GX Boat Page and E-drive integrations, cell level monitoring for Lynx Smart BMS NG, Garmin EmpirBus digital switching, Shelly smart device integration, and much more. For a more visual overview and to see&hellip;","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2026\/02\/Venus-OS-3.70_315856177-150x150.png","author_name":"Matthijs Vader","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/matthijs-victron\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/04813a2afa21aa517530c3ceb326c13b89f3be8c3b094cee4f5f6266df5a5fdf?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/04813a2afa21aa517530c3ceb326c13b89f3be8c3b094cee4f5f6266df5a5fdf?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/04813a2afa21aa517530c3ceb326c13b89f3be8c3b094cee4f5f6266df5a5fdf?s=96&d=mm&r=g&s=96"},"categories":[{"name":"Firmware & Software","link":"https:\/\/www.victronenergy.com\/blog\/category\/firmware-software\/"}],"date":"2026-02-25T12:05:55+02:00","date_gmt":"2026-02-25T10:05:55+00:00"},{"id":32730,"slug":"victronconnect-app-v6-30","title":"VictronConnect App v6.30","link":"https:\/\/www.victronenergy.com\/blog\/2026\/02\/23\/victronconnect-app-v6-30\/","excerpt":"VictronConnect app v6.30 brings a range of new features designed to make system monitoring and management easier for both professionals and end-users. These include VRM integration, new tools for system monitoring, more insight during firmware updates, and a Batch Programming feature aimed at simplifying work for professionals. In the next sections, we take a closer&hellip;","featured_image":"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2026\/02\/Venus-OS-3.60-56_314584543-150x150.png","author_name":"Beril","author_link":"https:\/\/www.victronenergy.com\/blog\/author\/bberkem\/","author_avatar":{"24":"https:\/\/secure.gravatar.com\/avatar\/a18e95c9d838d5359f135ae704b95ae5d336e3c238b5aa877ef3a1e245c24b78?s=96&d=mm&r=g&s=24","48":"https:\/\/secure.gravatar.com\/avatar\/a18e95c9d838d5359f135ae704b95ae5d336e3c238b5aa877ef3a1e245c24b78?s=96&d=mm&r=g&s=48","96":"https:\/\/secure.gravatar.com\/avatar\/a18e95c9d838d5359f135ae704b95ae5d336e3c238b5aa877ef3a1e245c24b78?s=96&d=mm&r=g&s=96"},"categories":[{"name":"Firmware & Software","link":"https:\/\/www.victronenergy.com\/blog\/category\/firmware-software\/"},{"name":"News","link":"https:\/\/www.victronenergy.com\/blog\/category\/news\/"}],"date":"2026-02-23T16:25:50+02:00","date_gmt":"2026-02-23T14:25:50+00:00"}],"_links":{"self":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/3916","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\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/comments?post=3916"}],"version-history":[{"count":27,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/3916\/revisions"}],"predecessor-version":[{"id":4148,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/posts\/3916\/revisions\/4148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/media\/3940"}],"wp:attachment":[{"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/media?parent=3916"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/categories?post=3916"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.victronenergy.com\/blog\/wp-json\/wp\/v2\/tags?post=3916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}