{"product_id":"big-battery-48v-15kwh-nexus-lifepo-battery","title":"Big Battery | 48V 15kWh NEXUS LiFePO₄ Battery","description":"\u003ch2 data-end=\"40\" data-start=\"0\"\u003e\u003cstrong\u003eBig Battery  | 48V 15kWh NEXUS LiFePO₄ Battery\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-end=\"474\" data-start=\"42\"\u003eThe Big Battery 48V 15kWh NEXUS LiFePO₄ battery delivers high-capacity, reliable energy storage for residential and commercial solar, backup, and off-grid applications. Featuring advanced LiFePO₄ cells, it provides long cycle life, excellent safety, and stable performance under diverse conditions. Its modular design allows easy scalability, making it ideal for expanding energy storage systems while maintaining efficiency and durability.\u003c\/p\u003e\n\u003cp data-end=\"494\" data-start=\"476\"\u003e\u003cstrong data-end=\"492\" data-start=\"476\"\u003eKEY FEATURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"174\" data-start=\"81\"\u003e\n\u003cstrong data-end=\"99\" data-start=\"83\"\u003ePerformance:\u003c\/strong\u003e Provides uninterrupted, long-lasting power for any off-grid application.\u003c\/li\u003e\n\u003cli data-end=\"265\" data-start=\"175\"\u003e\n\u003cstrong data-end=\"191\" data-start=\"177\"\u003eChemistry:\u003c\/strong\u003e Utilizes advanced LiFePO4 technology for enhanced safety and longevity.\u003c\/li\u003e\n\u003cli data-end=\"381\" data-start=\"266\"\u003e\n\u003cstrong data-end=\"279\" data-start=\"268\"\u003eDesign:\u003c\/strong\u003e Rugged, floor-standing design suitable for installation in tech closets, garages, cabins, or sheds.\u003c\/li\u003e\n\u003cli data-end=\"469\" data-start=\"382\"\u003e\n\u003cstrong data-end=\"399\" data-start=\"384\"\u003eProtection:\u003c\/strong\u003e Features an integrated BMS with four layers of safety redundancies.\u003c\/li\u003e\n\u003cli data-end=\"560\" data-start=\"470\"\u003e\n\u003cstrong data-end=\"488\" data-start=\"472\"\u003eScalability:\u003c\/strong\u003e High-capacity, expandable storage solution, supporting up to 225 kWh.\u003c\/li\u003e\n\u003cli data-end=\"649\" data-start=\"561\"\u003e\n\u003cstrong data-end=\"580\" data-start=\"563\"\u003eApplications:\u003c\/strong\u003e Ideal for off-grid solar systems, commercial backup, and home EPS.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e51.2V 300AH-15KWH Energy storage box, with fire extinguisher (aerosol) \u0026amp; heater\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/07\/48V-NEXUS-1024x637.jpg\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/i0.wp.com\/bigbattery.com\/wp-content\/uploads\/2025\/07\/Nexus-InfoGraphic-1-scaled.png?fit=2560%2C1051\u0026amp;quality=80\u0026amp;ssl=1\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/i0.wp.com\/bigbattery.com\/wp-content\/uploads\/2025\/07\/Product-Infographics-4-scaled.png?fit=2560%2C1051\u0026amp;quality=80\u0026amp;ssl=1\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe title=\"15kwh NEXUS Off-Grid Battery MAXED OUT\" src=\"https:\/\/www.youtube.com\/embed\/trKXzj79YI4\" height=\"855\" width=\"1466\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGeneral\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProduct name\u003c\/td\u003e\n\u003ctd\u003eNEXUS 15 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eGTIN\/UPC\u003c\/td\u003e\n\u003ctd\u003e00199874694771\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem voltage\u003c\/td\u003e\n\u003ctd\u003e48 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eNominal voltage\u003c\/td\u003e\n\u003ctd\u003e51.2 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eChemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCapacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUsable energy\u003c\/td\u003e\n\u003ctd\u003e15 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eAh capacity\u003c\/td\u003e\n\u003ctd\u003e300 Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCell configuration\u003c\/td\u003e\n\u003ctd\u003e16S1P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectrical Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMax continuous discharge current\u003c\/td\u003e\n\u003ctd\u003e140 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eMax continuous power\u003c\/td\u003e\n\u003ctd\u003e7.6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eMax discharge peak current\u003c\/td\u003e\n\u003ctd\u003e270 A (1 s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eMax charge current\u003c\/td\u003e\n\u003ctd\u003e140 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCharging voltage range\u003c\/td\u003e\n\u003ctd\u003e53.5 – 57.6 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eMax charge voltage\u003c\/td\u003e\n\u003ctd\u003e57.9 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSuggested low voltage cutoff\u003c\/td\u003e\n\u003ctd\u003e50.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eOperating voltage range\u003c\/td\u003e\n\u003ctd\u003e48 – 57.6 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCharge temperature range\u003c\/td\u003e\n\u003ctd\u003e32°F – 113°F (0°C – 45°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eDischarge temperature range\u003c\/td\u003e\n\u003ctd\u003e-4°F – 113°F (-20°C – 45°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eOptimal discharge temperature\u003c\/td\u003e\n\u003ctd\u003e59°F – 95°F (15°C – 35°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eStorage temperature range (SoC \u0026gt;50%)\u003c\/td\u003e\n\u003ctd\u003e1 month: -4°F – 113°F (-20°C – 45°C) 3 months: -4°F – 95°F (-20°C – 35°C) 6 months: -4°F – 77°F (-20°C – 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironmental\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHumidity range\u003c\/td\u003e\n\u003ctd\u003e10% – 95% (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eAltitude limit\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2000 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMechanical\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e~315 lbs (143 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eDimensions (W × H × D)\u003c\/td\u003e\n\u003ctd\u003e19.7 × 27.5 × 15.7 in (500 × 700 × 400 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eProtection rating\u003c\/td\u003e\n\u003ctd\u003eIP54\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eIndoor, floor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnectivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMax parallel connections\u003c\/td\u003e\n\u003ctd\u003e15 units (up to 225 kWh)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCommunications\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ RJ45 \/ CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eManuals \u0026amp; Downloads\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2026\/01\/Nexus-SpecSheet.pdf\"\u003eSpec Sheet\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"https:\/\/bigbattery.com\/wp-content\/uploads\/2025\/12\/NEXUS-User-Manual1.2.3.pdf\"\u003e\u003cstrong\u003eUser Manual\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Big Battery","offers":[{"title":"Default Title","offer_id":51629711622426,"sku":"F-NXUS-48150-G1","price":2980.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/1398\/2234\/files\/EG4-48V-15kWh-NEXUS-LiFePO-Battery-1.png?v=1769491867","url":"https:\/\/solarguyspro.com\/products\/big-battery-48v-15kwh-nexus-lifepo-battery","provider":"Solar Guys Pro","version":"1.0","type":"link"}