{"id":17307,"date":"2020-10-08T09:58:31","date_gmt":"2020-10-08T09:58:31","guid":{"rendered":"https:\/\/ecotality.com\/?p=17307"},"modified":"2022-12-20T22:03:53","modified_gmt":"2022-12-20T22:03:53","slug":"how-solar-battery-chargers-work","status":"publish","type":"post","link":"https:\/\/ecotality.com\/how-solar-battery-chargers-work\/","title":{"rendered":"How a Solar Battery Charger Works"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"17307\" class=\"elementor elementor-17307\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-88f08f2 lead-section elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"88f08f2\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2e9b627\" data-id=\"2e9b627\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5a8449f article-title elementor-widget elementor-widget-heading\" data-id=\"5a8449f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">How a Solar Battery Charger Works<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-59e4205 toc-and-author-bio-section elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"59e4205\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-a76fab4 left-column\" data-id=\"a76fab4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-963be9d table-of-contents elementor-widget elementor-widget-shortcode\" data-id=\"963be9d\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\"><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_55 counter-hierarchy ez-toc-counter ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Page Contents<\/p>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ecotality.com\/how-solar-battery-chargers-work\/#Components-and-Their-Workings\" title=\"Components and Their Workings\">Components and Their Workings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ecotality.com\/how-solar-battery-chargers-work\/#Should-You-Buy-a-Solar-Charger\" title=\"Should You Buy a Solar Charger?\">Should You Buy a Solar Charger?<\/a><\/li><\/ul><\/nav><\/div>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ca3eec6 right-column\" data-id=\"ca3eec6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d091abe author-bio elementor-widget elementor-widget-shortcode\" data-id=\"d091abe\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\"><script type=\"application\/ld+json\">\n\t\t\t\t\t\t\t{\n\t\t\t\t\t\t\t  \"@context\": \"https:\/\/schema.org\/\",\n\t\t\t\t\t\t\t  \"@type\": \"Person\",\n\t\t\t\t\t\t\t  \"name\": \"Aniket\",\n\t\t\t\t\t\t\t  \"url\": \"https:\/\/ecotality.com\/author\/aniket\/\",\n\t\t\t\t\t\t\t  \"image\": \"https:\/\/secure.gravatar.com\/avatar\/324fd7f9d0b3e667f7223919e56f046a?s=96&d=mm&r=g\",\n\t\t\t\t\t\t\t  \"jobTitle\": \"Author\"  \n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t<\/script><p><img decoding=\"async\" loading=\"lazy\" class=\"author-bio-avatar\" src=\"https:\/\/secure.gravatar.com\/avatar\/324fd7f9d0b3e667f7223919e56f046a?s=50&amp;d=mm&amp;r=g\" alt=\"Aniket\" width=\"50\" height=\"50\" \/><\/p><p class=\"author-bio-text\"><span class=\"written-by-text\">Written by<\/span> <span class=\"job-title\">qualified solar engineer<\/span> <span class=\"author-name\">Aniket<\/span><span class=\"written-by-period\">.<\/span> <span class=\"last-updated-text\">Last updated:<\/span> <time datetime=\"2022-12-20 22:03:53\">December 20, 2022<\/time><\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4caed31 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4caed31\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b3770e9\" data-id=\"b3770e9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5ff3f74 elementor-widget elementor-widget-text-editor\" data-id=\"5ff3f74\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>A solar battery charger works by using photons in the sunlight to make electrons in the solar cells flow in a circuit, thus causing current and charging a battery in the solar power bank. By using direct sunlight as its source of energy, a solar battery charger proves to be one of the best solar gadgets, as it charges devices while being away from the grid.<\/p>\n<p>At a basic level, solar battery chargers work like any solar power system, but are much more compact and meant for smaller devices such as mobile phones and tablets. An important difference from typical solar systems is that solar battery chargers are entirely DC devices, meaning there is no mechanism to give AC power output.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Components-and-Their-Workings\"><\/span>Components and Their Workings<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A solar powered phone charger is a simple electronic appliance. It consists of a solar cell\/panel that generates the energy required. A battery stores this energy and some supporting electronic hardware to make this process safe, optimal, and efficient.<\/p>\n<p><picture><source srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/image-showing-a-solar-battery-charger-connected-to-a-mobile-phone.webp 624w,https:\/\/ecotality.com\/wp-content\/uploads\/image-showing-a-solar-battery-charger-connected-to-a-mobile-phone-300x146.webp 300w\" sizes=\"(max-width: 624px) 100vw, 624px\" type=\"image\/webp\"><img src=\"https:\/\/ecotality.com\/wp-content\/uploads\/image-showing-a-solar-battery-charger-connected-to-a-mobile-phone.png\" height=\"303\" width=\"624\" srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/image-showing-a-solar-battery-charger-connected-to-a-mobile-phone.png 624w, https:\/\/ecotality.com\/wp-content\/uploads\/image-showing-a-solar-battery-charger-connected-to-a-mobile-phone-300x146.png 300w\" sizes=\"(max-width: 624px) 100vw, 624px\" class=\"aligncenter size-full wp-image-17315 sp-no-webp\" alt=\"image showing a solar battery charger connected to a mobile phone\" decoding=\"async\" loading=\"lazy\"  > <\/picture><\/p>\n<p>Let\u2019s have a more detailed look at each of these components and how they work:<\/p>\n<h3>Solar Panel<\/h3>\n<p>Today, solar energy powers many appliances of different sizes, from solar garden lights to entire home systems. When it comes to <a href=\"https:\/\/ecotality.com\/solar-product-information\/portable-solar-charger-information\/\">portable chargers<\/a>, the solar panel is the power generating component of the chargers and the most distinguishing feature from standard battery chargers. As the name suggests, they harness solar energy and convert it into electrical energy.<\/p>\n<p>Currently, the best solar cell material in the market is silicon. Today, the best solar cells in the market are also commercially feasible are monocrystalline cells, which are the most preferred choice for portable solar chargers.<\/p>\n<p>This is done when photons (particles of light) in sunlight strike the solar cells&#8217; surface and cause electrons to break off from their orbits. This phenomenon is called the photoelectric effect. Electricity is the flow of electrons through a circuit, whether it is power flowing through car battery chargers or a power station.<\/p>\n<p>To amplify this effect, two regions are created in the solar cell \u2013 one with excess electrons and one deficient of electrons. The electrons cannot pass from one region to another due to a closed border known as the \u2018depletion layer\u2019. They must travel in an external circuit to reach the other layer, which is the other end of the cell.<\/p>\n<p><picture><source srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/working-of-a-solar-cell.webp 480w,https:\/\/ecotality.com\/wp-content\/uploads\/working-of-a-solar-cell-300x146.webp 300w,https:\/\/ecotality.com\/wp-content\/uploads\/working-of-a-solar-cell-354x174.webp 354w\" sizes=\"(max-width: 480px) 100vw, 480px\" type=\"image\/webp\"><img src=\"https:\/\/ecotality.com\/wp-content\/uploads\/working-of-a-solar-cell.png\" height=\"234\" width=\"480\" srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/working-of-a-solar-cell.png 480w, https:\/\/ecotality.com\/wp-content\/uploads\/working-of-a-solar-cell-300x146.png 300w, https:\/\/ecotality.com\/wp-content\/uploads\/working-of-a-solar-cell-354x174.png 354w\" sizes=\"(max-width: 480px) 100vw, 480px\" class=\"aligncenter size-full wp-image-17316 sp-no-webp\" alt=\"working of a solar cell\" decoding=\"async\" loading=\"lazy\"  > <\/picture><\/p>\n<p style=\"text-align: center;\">Working of a Solar Cell (Source \u2013 <a href=\"https:\/\/www.pbs.org\/wgbh\/nova\/tech\/how-solar-cell-works.html\" target=\"_blank\" rel=\"nofollow noopener\">PBS<\/a>)<\/p>\n<p>The above image is a simple representation of how the cell works. The green region is the n-region (excess electrons), and red is the p-region (electron-deficient). The more photons that strike the surface, the higher solar energy is utilized, meaning more power generation. Hence, phone chargers work best in direct sunlight.<\/p>\n<p>In the case of a solar battery charger, this external circuit charges the battery inside, bringing us to our next component in the list.<\/p>\n<h3>Rechargeable Battery<\/h3>\n<p>Some solar chargers work without a built-in battery, but they can be used only during hours of sunlight. Thus, a battery is essential if you want to use the charger at any hour of the day. Batteries are chemical devices that can store energy and supply it whenever required.<\/p>\n<p>Portable solar chargers usually have a lithium-ion battery in them, which allows to pack more battery life per unit volume \u2013 one of the major benefits of solar battery chargers. These batteries are usually rated at 3.6 V, while regular cell phone chargers work at 5 V.<\/p>\n<p>Good quality chargers can have batteries with a capacity up to 20,000 mAh, meaning a full charge can carry enough energy to charge several smartphones. For a large battery, however, it will take longer to charge from solar. They also have a longer battery life, with thousands of charging-discharging cycles.<\/p>\n<p>Voltage is the electric potential difference between two points, like water stored at two points of different elevations. It will always flow from the higher potential to the lower potential.<\/p>\n<p>Hence, the solar panel needs to be at a slightly higher potential than the battery to charge from the sun. Batteries of portable solar chargers usually come at around 3.6 V; hence the solar panel should be around the same range \u2013 not lower than that, but not too high to avoid damage.<\/p>\n<p>The image below shows the inside of a portable solar battery charger. The first thing we see is the large slab of the rechargeable battery inside. In the picture here, the battery (silver) occupies most of the volume and weight inside the charger casing, similar to standard battery chargers.<\/p>\n<p>On the left side, a portion of the solar panel can be seen. Two wires connect the positive and negative to the printed circuit board (PCB), which then connects to the battery.<\/p>\n<p><picture><source srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/image-of-the-inside-of-a-solar-battery-charger.webp 480w,https:\/\/ecotality.com\/wp-content\/uploads\/image-of-the-inside-of-a-solar-battery-charger-300x146.webp 300w,https:\/\/ecotality.com\/wp-content\/uploads\/image-of-the-inside-of-a-solar-battery-charger-354x174.webp 354w\" sizes=\"(max-width: 480px) 100vw, 480px\" type=\"image\/webp\"><img src=\"https:\/\/ecotality.com\/wp-content\/uploads\/image-of-the-inside-of-a-solar-battery-charger.png\" height=\"234\" width=\"480\" srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/image-of-the-inside-of-a-solar-battery-charger.png 480w, https:\/\/ecotality.com\/wp-content\/uploads\/image-of-the-inside-of-a-solar-battery-charger-300x146.png 300w, https:\/\/ecotality.com\/wp-content\/uploads\/image-of-the-inside-of-a-solar-battery-charger-354x174.png 354w\" sizes=\"(max-width: 480px) 100vw, 480px\" class=\"aligncenter size-full wp-image-17317 sp-no-webp\" alt=\"image of the inside of a solar battery charger\" decoding=\"async\" loading=\"lazy\"  > <\/picture><\/p>\n<p>Technically, solar panels can charge your battery directly. However, for optimal and safe battery charging, some electronics need to be in place too. For a small device like this, a small PCB is sufficient. Let\u2019s have a look at what it does.<\/p>\n<h3>PCB<\/h3>\n<p>PCB stands for \u2018Printed Circuit Board\u2019, which as the name suggests, is a board that connects several small electronic items and mechanically supports them electronically. These include resistors, diodes, LEDs, etc. A solar phone charger works flawlessly thanks to this small, flat piece of technology.<\/p>\n<p>Following is the image of a PCB from a solar powered phone charger. There is quite a bit of circuitry, and hence complexity involved in how solar battery chargers work. But from a higher-level perspective, it is simple to understand how it works.<\/p>\n<p><picture><source srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/PCB-inside-a-solar-battery-charger.webp 624w,https:\/\/ecotality.com\/wp-content\/uploads\/PCB-inside-a-solar-battery-charger-300x181.webp 300w\" sizes=\"(max-width: 624px) 100vw, 624px\" type=\"image\/webp\"><img src=\"https:\/\/ecotality.com\/wp-content\/uploads\/PCB-inside-a-solar-battery-charger.png\" height=\"376\" width=\"624\" srcset=\"https:\/\/ecotality.com\/wp-content\/uploads\/PCB-inside-a-solar-battery-charger.png 624w, https:\/\/ecotality.com\/wp-content\/uploads\/PCB-inside-a-solar-battery-charger-300x181.png 300w\" sizes=\"(max-width: 624px) 100vw, 624px\" class=\"aligncenter size-full wp-image-17318 sp-no-webp\" alt=\"PCB inside a solar battery charger\" decoding=\"async\" loading=\"lazy\"  > <\/picture><\/p>\n<p style=\"text-align: center;\">PCB inside a solar battery charger (Source \u2013 <a href=\"https:\/\/steemit.com\/gadgets\/@proteus-h\/teardown-explanation-of-a-solar-powered-usb-battery-pack\" target=\"_blank\" rel=\"nofollow noopener\">Steemit<\/a>)<\/p>\n<p>The wires are soldered to the points that say B, L, and SUN, which stand for battery, LED, and solar, with the positive and negative markings. Poor quality chargers might have weakly soldered wires, making physical shocks a serious problem.<\/p>\n<p>Almost every charger will have one or more LEDs to indicate either a dead battery, full charge, or battery charging in progress.<\/p>\n<p>The two large metal pieces on the top are USB ports, which will connect the charging wire for your device. In the center, a micro USB port can be seen. Thanks to this, you can charge from the sun and another electrical source &#8211; your wall unit at home, which is a handy feature. Your regular phone chargers work well in this case. It is also faster with a wall unit to fully charge the battery.<\/p>\n<p>The remaining circuitry includes a boost converter, which steps up the 3.6 V to 5 V, since our phones or tablets have batteries rated at 5 V. As stated before, solar chargers work perfectly with standard cell phone chargers. Some components also protect the battery from possible surge currents.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Should-You-Buy-a-Solar-Charger\"><\/span>Should You Buy a Solar Charger?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>With lower cost and reliable brands, solar chargers are rapidly gaining popularity. The best solar chargers can pack more battery life, have higher efficiency cells, and a more durable casing. We have an excellent <a href=\"https:\/\/ecotality.com\/how-to-use-a-solar-battery-charger\/\">guide to using a solar charger<\/a> that you can check out.<\/p>\n<p>Unlike bulky systems such as battery chargers for cars, <a href=\"https:\/\/ecotality.com\/best-portable-solar-chargers\/\">solar powered portable chargers<\/a> are easy to carry even in a pocket. They are an extremely useful device for anyone who loves the outdoors and hates a phone with a dead battery.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-513533f post-rating-section elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"513533f\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-72f6be6\" data-id=\"72f6be6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f32531a post-rating elementor-widget elementor-widget-shortcode\" data-id=\"f32531a\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\"><!-- Rate my Post Plugin --><div  class=\"rmp-widgets-container rmp-wp-plugin rmp-main-container js-rmp-widgets-container js-rmp-widgets-container--17307 \"  data-post-id=\"17307\">    <!-- Rating widget -->  <div class=\"rmp-rating-widget js-rmp-rating-widget\">          <p class=\"rmp-heading rmp-heading--title\">        We hope you liked this article. 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Be the first to rate this post.    <\/p>    <p class=\"rmp-rating-widget__msg js-rmp-msg\"><\/p>  <\/div>  <!--Structured data -->  <script type=\"application\/ld+json\">{  \"@context\": \"http:\/\/schema.org\",  \"@type\": \"Product\",  \"aggregateRating\": {    \"@type\": \"AggregateRating\",    \"bestRating\": \"5\",    \"ratingCount\": \"3\",    \"ratingValue\": \"5\"  },  \"image\": \"https:\/\/ecotality.com\/wp-content\/uploads\/image-showing-a-solar-battery-charger-connected-to-a-mobile-phone-on-the-beach.jpg\",  \"name\": \"How a Solar Battery Charger Works\",  \"description\": \"How a Solar Battery Charger Works\"}<\/script>      <\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>How a Solar Battery Charger Works A solar battery charger works by using photons in the sunlight to make electrons in the solar cells flow in a circuit, thus causing current and charging a battery in the solar power bank. By using direct sunlight as its source of energy, a solar battery charger proves to &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/ecotality.com\/how-solar-battery-chargers-work\/\"> <span class=\"screen-reader-text\">How a Solar Battery Charger Works<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":14,"featured_media":17323,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"right-sidebar","site-content-layout":"plain-container","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","_glsr_average":0,"_glsr_ranking":0,"_glsr_reviews":0},"categories":[55],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How a Solar Battery Charger Works - ecotality.com<\/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:\/\/ecotality.com\/how-solar-battery-chargers-work\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How a Solar Battery Charger Works - ecotality.com\" \/>\n<meta property=\"og:description\" content=\"How a Solar Battery Charger Works A solar battery charger works by using photons in the sunlight to make electrons in the solar cells flow in a circuit, thus causing current and charging a battery in the solar power bank. 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