{"product_id":"800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-buck-converter-auto-charging-board-ideal-diode","title":"800W 25A MPPT Solar Charger Power Supply Module 18V-90V to 2-60V DC-DC Step Down Buck Converter Auto Charging Board Ideal Diode","description":"\u003csection data-tufzen-geo-summary=\"v1\" class=\"tufzen-product-summary\"\u003e\u003ch2\u003eProduct Summary\u003c\/h2\u003e\n\u003cp\u003e800W 25A MPPT Solar Charger Power Supply Module 18V-90V to 2-60V DC-DC Step Down Buck is a power and battery module selected for power conversion, battery testing, charging and regulated output projects. It is suitable for electronics builders, repair users and lab bench users who need practical electronics hardware for reliable project work.\u003c\/p\u003e\n\u003ch3\u003eBest For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003epower conversion, battery testing, charging and regulated output projects\u003c\/li\u003e\n\u003cli\u003eDIY electronics, battery packs, solar modules and bench power workflows\u003c\/li\u003e\n\u003cli\u003eElectronics testing, repair, prototyping and maker workflows\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWho is this product for?\u003c\/strong\u003e It is intended for electronics builders, repair users and lab bench users.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should I check before buying?\u003c\/strong\u003e Review the product options, specifications, included accessories and compatibility details on this page.\u003c\/p\u003e\u003c\/section\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 26px;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif;\"\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-1.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003cbr\u003eFeatures\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e1. Supports 18-90V wide voltage input, compatible with various solar panels for flexible and efficient operation\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e2. Supports adaptive 5W-800W photovoltaic panels to meet diverse power requirements across scenarios\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e3. Features output reverse current protection with built-in high-current ideal diode functionality, enabling direct battery charging\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e4. Standby power consumption approx. 0.9W during daylight; zero power consumption with automatic backflow prevention at night\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e5. Supports DC-DC regulated power output for direct load connection\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 26px;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif;\"\u003eParameter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eInput Voltage: DC 18-90V\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eOutput Voltage: DC 2-60V\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eOutput Current: 0-25A adjustable\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eUnattended automatic lithium battery charging without activation\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eCharges even on cloudy days; automatically stops when fully charged\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eAutomatic temperature-controlled fan cooling\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eCan function as a step-down regulated adjustable power supply\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eThis DC power module is a buck controller. Considering wire voltage drops in PV panels and lower panel voltages during cloudy\/rainy conditions, charging a 12V battery requires PV panel open-circuit voltage exceeding 18V input. For example: - 18V panels: 2 panels in series (e.g., 18V-72V for 12V charging) - 42V panels: 2 panels in series (e.g., 42V-80V for 24V charging)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 26px;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif;\"\u003eCommissioning Procedure\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e1. Connect 16V-80V PV panel input (do not exceed input voltage; observe polarity). Correct wiring activates the power indicator light. If the output indicator light illuminates immediately, proceed directly to Step 3.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e2. If the power indicator lights up after input connection but no output voltage is present, first adjust the MPPT potentiometer counterclockwise until voltage output appears and the output indicator lights up.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e3. For charging a 12V battery, set output to 14.2V; for a 24V battery, set output to 28.4V; for a 48V battery, set output to 56V.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003e4. Connect the battery and test the input voltage with a multimeter. Adjust the MPPT potentiometer to match the input voltage to the PV panel's maximum power point voltage (i.e., operating voltage). For an 18V PV panel, the open-circuit voltage of a single string is approximately 21V, with an operating voltage of 18V. For a 36V PV panel, the open-circuit voltage of a single string is approximately 43V, with an operating voltage of 36V. For a 43V solar panel, the open-circuit voltage of a single string is approximately 49V, with an operating voltage of 43V. Specifications vary by panel type; refer to the default factory parameters labeled on the panel's back.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eSet the output voltage to 14.2V and output current to 20A. Adjustable range: 1-20A. Set the MPPT voltage to 17V.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 26px;\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif;\"\u003ePackage include\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"font-family: helvetica, arial, sans-serif; font-size: 20px;\"\u003eModule*1\u003cbr\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-2.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-3.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-4.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-5.webp?v=1779201868\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-6.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-7.webp?v=1779201868\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-8.webp?v=1779201868\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-9.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-10.webp?v=1779201868\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-11.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-12.webp?v=1779201868\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-13.webp?v=1779201867\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-14.webp?v=1779201868\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg class=\"wscnph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/tufzen-800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-15.webp?v=1779201868\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/div\u003e\n\u003cbr\u003e\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cp\u003e\u003c\/p\u003e","brand":"TUFZEN Components","offers":[{"title":"800W","offer_id":47664278896898,"sku":"12000051326292388","price":23.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0636\/7674\/3938\/files\/Sc6aff9866f8d42a7a947f47fdaec5744a.webp?v=1776239175","url":"https:\/\/tufzen.com\/products\/800w-25a-mppt-solar-charger-power-supply-module-18v-90v-to-2-60v-dc-dc-step-down-buck-converter-auto-charging-board-ideal-diode","provider":"TUFZEN","version":"1.0","type":"link"}