{"product_id":"jk-b4a24s-active-balancer","title":"JKBMS Active Balancer JK-B4A24S — 4A 2~24S Battery Equalizer","description":"\u003ch2\u003eJKBMS JK-B4A24S — 4A Active Battery Balancer for 2~24S Packs\u003c\/h2\u003e\u003cp\u003eWhen 2A isn't fast enough, the \u003cstrong\u003eJK-B4A24S\u003c\/strong\u003e steps up. Delivering a constant \u003cstrong\u003e4A balancing current\u003c\/strong\u003e via ultracapacitor energy transfer, it handles larger-capacity battery packs that need faster cell equalization — keeping voltage differences minimal and the pack running at full potential.\u003c\/p\u003e\u003cp\u003eDesigned for 2 to 24 series configurations, the JK-B4A24S supports cascade installation for systems beyond 24S, and includes Bluetooth app monitoring as standard. Optional RS485 or CAN communication allows seamless integration with inverters and BMS systems.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4A constant active balancing current\u003c\/strong\u003e — twice the speed of 2A models for larger packs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports 2~24S configurations\u003c\/strong\u003e — LiFePO4, Li-ion, LiPo, LTO, lead-acid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCascade capable\u003c\/strong\u003e — expand beyond 24S by linking multiple units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-precision voltage monitoring\u003c\/strong\u003e — ±3mV accuracy per cell\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth connectivity\u003c\/strong\u003e — monitor and configure via mobile app\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional RS485 or CAN communication\u003c\/strong\u003e (one of two, select at order)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional temperature sensor\u003c\/strong\u003e input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower-on switch\u003c\/strong\u003e — manual control over balancer activation\u003c\/li\u003e\n\u003cli\u003eDimensions: 176.6 × 127.3 × 23.5 mm | Weight: 712g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCell count: 2S ~ 24S\u003c\/li\u003e\n\u003cli\u003eBalancing current: 4A (constant)\u003c\/li\u003e\n\u003cli\u003eCell voltage range: 1V ~ 5V\u003c\/li\u003e\n\u003cli\u003eVoltage accuracy: ±3mV\u003c\/li\u003e\n\u003cli\u003eExternal power supply: DC 9~100V\u003c\/li\u003e\n\u003cli\u003ePower-on switch: Yes\u003c\/li\u003e\n\u003cli\u003eCascade: Supported\u003c\/li\u003e\n\u003cli\u003eDimensions: 176.6 × 127.3 × 23.5 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 712g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen to Choose the 4A Model\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBattery packs with \u003cstrong\u003ehigher capacity cells\u003c\/strong\u003e (100Ah+) where 2A balancing is too slow\u003c\/li\u003e\n\u003cli\u003eSystems with \u003cstrong\u003efrequent deep cycling\u003c\/strong\u003e that need faster recovery between cycles\u003c\/li\u003e\n\u003cli\u003eApplications where \u003cstrong\u003etighter voltage consistency\u003c\/strong\u003e is critical under load\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLarge residential and commercial ESS (48V~96V+)\u003c\/li\u003e\n\u003cli\u003eHigh-capacity solar storage systems\u003c\/li\u003e\n\u003cli\u003eIndustrial backup power with large cell packs\u003c\/li\u003e\n\u003cli\u003eMulti-unit cascade installations beyond 24S\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e📱 \u003cstrong\u003eBluetooth App:\u003c\/strong\u003e Available for iOS and Android — monitor cell voltages, balancing status, and configure parameters wirelessly.\u003c\/p\u003e\u003cp\u003e\u003csmall\u003e⚠️ \u003cstrong\u003eShipping Note:\u003c\/strong\u003e Default ships from China. US warehouse stock available upon request — US inventory levels may vary and cannot be guaranteed. Please contact us before ordering if US local shipping is required. WhatsApp: \u003ca href=\"https:\/\/wa.me\/18189383175\"\u003e+1 818 938 3175\u003c\/a\u003e\u003c\/small\u003e\u003c\/p\u003e\u003cp\u003eNeed help? Contact us via WhatsApp: \u003ca href=\"https:\/\/wa.me\/18189383175\"\u003e+1 818 938 3175\u003c\/a\u003e | Email: service@jkbms-ess.com\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"Default Title","offer_id":49553836966026,"sku":"JK-B4A24S","price":109.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/JKBMS_JK-B4A24S_4A_Active_Battery_Balancer_for_2_24S_LiFePO4_Lithium_Battery_Packs.jpg?v=1781546975","url":"https:\/\/jkbms-ess.com\/fr-eu\/products\/jk-b4a24s-active-balancer","provider":"JKBMS-ESS","version":"1.0","type":"link"}