{"id":12114,"date":"2018-03-22T17:52:22","date_gmt":"2018-03-22T15:52:22","guid":{"rendered":"https:\/\/www.victronenergy.com\/blog\/?p=12114"},"modified":"2025-06-11T12:39:12","modified_gmt":"2025-06-11T10:39:12","slug":"voltage-temperature-sense-for-solar-chargers","status":"publish","type":"post","link":"https:\/\/www.victronenergy.com\/blog\/2018\/03\/22\/voltage-temperature-sense-for-solar-chargers\/","title":{"rendered":"Voltage &amp; Temperature Sense for Solar Chargers"},"content":{"rendered":"<p>Our range of solar chargers fitted with a VE.Direct port were lacking battery voltage and temperature charge compensation. <strong>Not now<\/strong>!<\/p>\n<p>Also, today we announce the launch of Victron Energy&#8217;s <strong>Smart Battery Sense<\/strong>\u00a0&#8211; a product to complement the new feature. New, simple, smart &#8230;and wireless.<\/p>\n<p><!--more--><\/p>\n<h3>Why do we need voltage and temperature sensing?<\/h3>\n<ul>\n<li>Improves solar yield<\/li>\n<li>Maximises battery capacity<\/li>\n<li>Increases battery life<\/li>\n<\/ul>\n<p>AGM &amp; Gel (lead acid) <a href=\"https:\/\/www.victronenergy.com\/batteries\" target=\"_blank\">batteries<\/a>\u00a0use charging algorithms based on a standardised temperature of 25\u00b0C. However &#8211; when they&#8217;re cold these batteries need a higher charge-voltage &#8230;and a lower charge-voltage when they&#8217;re hot. So, optimally, we should modify the charge-voltage by, typically, -16.2mV\/\u00b0C.<\/p>\n<p>Also there can be a difference between the voltage measured at an MPPT solar charger&#8217;s terminals, and that measured at the battery terminals. For optimum charging that discrepancy needs to be taken into account, too. The <a href=\"https:\/\/www.victronenergy.com\/support-and-downloads\/software#victron-toolkit-app\" target=\"_blank\">Victron Toolkit app<\/a> demonstrates how this voltage drop is brought about as a consequence of cable length and gauge; together with voltage and current variations.<\/p>\n<p>Good news though: Our MPPT Solar Chargers and accessories can figure all this out &#8211; so you don&#8217;t have to!<\/p>\n<h3>Voltage and Temperature data &#8211; transmitted wirelessly to your MPPT<\/h3>\n<p>The Smart Battery Sense is a wireless battery voltage and temperature sensor for Victron MPPT Solar Chargers.<\/p>\n<div id=\"attachment_12460\" style=\"width: 700px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-12460\" class=\"wp-image-12460 size-blogpost-content\" src=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624-690x336.jpg\" alt=\"\" width=\"690\" height=\"336\" srcset=\"https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624-690x336.jpg 690w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624-730x355.jpg 730w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624-1024x499.jpg 1024w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624-768x374.jpg 768w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624-300x146.jpg 300w, https:\/\/www.victronenergy.com\/blog\/wp-content\/uploads\/sites\/10\/2018\/03\/MPPT-Smart-Battery-Sense-compund-image_65311624.jpg 1920w\" sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><\/a><p id=\"caption-attachment-12460\" class=\"wp-caption-text\">Perfect partners.<\/p><\/div>\n<p>&nbsp;<\/p>\n<ul>\n<li>Simple installation &#8211; attach the unit to any battery by its self-adhesive tape.<\/li>\n<li>Protected by an inline fuse.<\/li>\n<li>Voltage and temperature data is transmitted wirelessly to the Solar Charger.<\/li>\n<li>Monitor &amp; configure the unit from your smart phone &#8211; via our free-to-use\u00a0<a href=\"https:\/\/www.victronenergy.com\/support-and-downloads\/software#victronconnect-app\" target=\"_blank\">VictronConnect app<\/a>.<\/li>\n<li>Transmitted data can be networked to one, two &#8211; or more solar chargers connected to the same battery bank.<\/li>\n<li>Works for 12, 24 and 48 volt battery banks<\/li>\n<li>Works for both Lithium and Lead battery banks<\/li>\n<li>Compatible with most\u00a0<a href=\"https:\/\/www.victronenergy.com\/solar-charge-controllers\" target=\"_blank\">BlueSolar and SmartSolar MPPT charger<\/a>\u00a0models: see <a href=\"https:\/\/www.victronenergy.com\/live\/victronconnect:ve-smart-networking#vesmart_networking_compatible_products\" target=\"_blank\">VE.Smart Networking<\/a> for compatible-models list.<\/li>\n<\/ul>\n<p>Learn more\u00a0from the <a href=\"https:\/\/www.victronenergy.com\/meters-and-sensors\/smart-battery-sense\" target=\"_blank\">Smart Battery Sense product page<\/a>\u00a0or from the <a href=\"https:\/\/www.victronenergy.com\/live\/smart_battery_sense_manual\" target=\"_blank\">Smart Battery Sense Manual<\/a> &#8211; together with the <a href=\"https:\/\/www.victronenergy.com\/live\/victronconnect:ve-smart-networking\" target=\"_blank\">VE.Smart Networking manual<\/a>. Or watch the Smart Battery Sense introductory video:<\/p>\n\n<!-- iframe plugin v.6.0 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/v62wCfXaWXY?rel=0&#038;amp;showinfo=0\" width=\"100%\" height=\"400\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<h3>More options for Voltage- and Temperature- compensated charging<\/h3>\n<p>Besides the Smart Battery Sense there are other options too.\u00a0We&#8217;ve listed all of them in price order:<\/p>\n<ol>\n<li>Do nothing with no <em>voltage-compensated<\/em> charging. The MPPT already has ambient <em>temperature sensing<\/em> &#8211; though that method has its limitations.<\/li>\n<li>Installing<em> Smart Battery Sense<\/em> offers the best value for money. Connection to your solar charger(s) is wireless.<\/li>\n<li>Installing a\u00a0<a href=\"https:\/\/www.victronenergy.com\/battery-monitors\/bmv-712-smart\" target=\"_blank\">BMV-712 Smart<\/a>\u00a0together with its <a href=\"https:\/\/www.victronenergy.com\/accessories\/temperature-sensor-for-bmv-702\" target=\"_blank\">temperature accessory<\/a>, will provide full-blown battery monitoring, too.\u00a0Connection to your solar charger(s) is wireless.<\/li>\n<li>Installing a <a href=\"https:\/\/www.victronenergy.com\/panel-systems-remote-monitoring\/color-control\" target=\"_blank\">Color Control GX<\/a> or <a href=\"https:\/\/www.victronenergy.com\/panel-systems-remote-monitoring\/venus-gx\" target=\"_blank\">Venus GX<\/a>, wired with a VE.Direct cable, and having\u00a0<a href=\"https:\/\/www.victronenergy.com\/live\/ccgx:start#dvcc_-_distributed_voltage_and_current_control\" target=\"_blank\">DVCC<\/a>\u00a0enabled. This is for more complex systems &#8211; one&#8217;s which include\u00a0<a href=\"https:\/\/www.victronenergy.com\/inverters-chargers\" target=\"_blank\" rel=\"noopener\">inverter\/chargers<\/a>\u00a0for example. Note: you may still need a BMV &#8211; subject to the battery-monitoring method for your system.<\/li>\n<\/ol>\n<h3>Conclusion<\/h3>\n<p>I&#8217;m pleased to see the launch of charge-compensated MPPTs; and of\u00a0<a href=\"https:\/\/www.victronenergy.com\/meters-and-sensors\/smart-battery-sense\" target=\"_blank\">Smart Battery Sense<\/a>. I&#8217;ll be happier knowing that my batteries are getting <em>exactly<\/em> the right charge with optimal temperature and voltage compensation.<\/p>\n<p>No matter how you choose to instigate voltage- and temperature- compensated charging, make sure you do &#8211; it brings only benefits!<\/p>\n<p>I always say: There are many ways to skin a cat &#8211; and the choice is yours. But <strong>Smart Battery Sense<\/strong> certainly <em>does<\/em> make sense when it comes to simplicity and economics!<\/p>\n<p>John Rushworth<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Our range of solar chargers fitted with a VE.Direct port were lacking battery voltage and temperature charge compensation. Not now! Also, today we announce the launch of Victron Energy&#8217;s Smart Battery Sense\u00a0&#8211; a product to complement the new feature. New, simple, smart &#8230;and wireless.<\/p>\n","protected":false},"author":5,"featured_media":12193,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[124,131,113,125,126],"tags":[],"class_list":["post-12114","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-firmware-software","category-instructional-videos","category-news","category-products","category-technical-articles"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Voltage &amp; Temperature Sense for Solar Chargers - 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\/2018\/03\/22\/voltage-temperature-sense-for-solar-chargers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Voltage &amp; Temperature Sense for Solar Chargers - Victron Energy\" \/>\n<meta property=\"og:description\" content=\"Our range of solar chargers fitted with a VE.Direct port were lacking battery voltage and temperature charge compensation. Not now! Also, today we announce the launch of Victron Energy&#8217;s Smart Battery Sense\u00a0&#8211; a product to complement the new feature. 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Not now! Also, today we announce the launch of Victron Energy\u2019s Smart Battery Sense\u00a0\u2013 a product to complement the new feature. New, simple, smart \u2026and wireless.","subtitle":"","related_posts":[{"id":33712,"slug":"victronconnect-v6-40","title":"VictronConnect v6.40","link":"https:\/\/www.victronenergy.com\/blog\/2026\/07\/31\/victronconnect-v6-40\/","excerpt":"This VictronConnect app update is all about convenience and connectivity. For installers, that might mean walking up to any installation with any type of laptop, and being able to connect and adjust product settings right away, without needing extra tools. 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