{"product_id":"mean-well-ad-155b-155w-single-output-battery-charger-ups-function","title":"MEAN WELL AD-155B 155W Single Output Battery Charger - UPS Function","description":"\u003cp\u003eOur review of the MEAN WELL AD-155B finds it best suited for technicians and small-system integrators who need a compact AC to DC power supply with an integrated battery charger and UPS function. The single most compelling reason to buy is its dependable dual-output design that pairs a strong 27.6 VDC, 5 A primary output with a secondary 27.1 VDC charging line, delivering reliable backup capability without separate chargers. In practice it performs as a straightforward, no-frills power module that balances safety protections and useful power density for continuous and backup applications.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual output with UPS function:\u003c\/strong\u003e The primary 27.6 VDC 5 A output and secondary 27.1 VDC 0.5 A charging line keep a battery charged while supplying load power and enabling seamless backup switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal AC input:\u003c\/strong\u003e Input range from 88 to 264 VAC and 47 to 63 Hz makes installation flexible across international mains without extra configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in protections:\u003c\/strong\u003e Short circuit, overload, over voltage, battery low and reverse polarity protections reduce risk to connected batteries and equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConvection cooled:\u003c\/strong\u003e Free air convection cooling requires no additional fans, simplifying installation and reducing mechanical noise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh switching frequency:\u003c\/strong\u003e Fixed switching frequency design with PFC at 67 kHz and PWM at 134 kHz helps maintain stable regulation under varying loads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe AD-155B is aimed at installers and small-business users who need a compact AC to DC supply with a built-in charger and UPS capability for telecom cabinets, security systems, or industrial control panels. It fits well where a 27.6 VDC 5 A feed and a modest 0.5 A charging circuit suffice and where simple screw terminal wiring is preferred.\u003c\/p\u003e\n\u003cp\u003eThose needing larger charging currents, multiple high-current outputs, or an integrated user interface should look elsewhere; this unit prioritizes robust basic functions over advanced monitoring or higher-power battery charging. It is not a consumer UPS with sine wave output for PCs, but a specialized power module for equipment and battery maintenance.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReliable combination of a 27.6 VDC 5 A main output with a dedicated 27.1 VDC charging output for continuous operation and battery backup.\u003c\/li\u003e\n\u003cli\u003eWide AC input range and PFC improve compatibility and efficiency in varied environments.\u003c\/li\u003e\n\u003cli\u003eComprehensive protections and 100 percent full-load burn-in testing give confidence for long-term deployment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCharging current on the secondary output is limited to 0.5 A, so charging large battery banks will be slow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eAC to DC power supply with battery charger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary output voltage (VDC)\u003c\/td\u003e\n\u003ctd\u003e27.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput current (A)\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum output power (W)\u003c\/td\u003e\n\u003ctd\u003e151.55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional output (VDC)\u003c\/td\u003e\n\u003ctd\u003e27.1 (0.5 A charging)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput voltage\u003c\/td\u003e\n\u003ctd\u003e88 to 264 VAC, 47 to 63 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput connector\u003c\/td\u003e\n\u003ctd\u003eScrew terminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe MEAN WELL AD-155B is a practical choice for professionals needing a compact, reliable 27.6 VDC supply with an integrated battery charger and UPS function; it delivers solid protections, flexible AC compatibility, and convection cooling at a reasonable value. Buy it if you need dependable backup for telecom, security, or control systems and can work within the 0.5 A charge-current limitation.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit provide uninterrupted power during mains loss?\u003c\/strong\u003e\u003cbr\u003eYes, the AD-155B includes a battery charger and UPS function designed to switch to battery power for connected loads when mains fails.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat charging current is available for the battery?\u003c\/strong\u003e\u003cbr\u003eThe dedicated charging output provides 27.1 VDC at 0.5 A, intended for maintenance charging rather than rapid recharge of large banks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs active cooling required for installation?\u003c\/strong\u003e\u003cbr\u003eNo, the design uses free air convection cooling; ensure adequate ventilation but no fan is required.\u003c\/p\u003e","brand":"MEAN WELL","offers":[{"title":"Default Title","offer_id":48635844231387,"sku":"B005T8WEF2","price":60.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71_JtiIpvgL._SL1000.jpg?v=1778652618","url":"https:\/\/gearmusthave.com\/products\/mean-well-ad-155b-155w-single-output-battery-charger-ups-function","provider":"GearMustHave","version":"1.0","type":"link"}