{"product_id":"bluetti-b500k-expansion-battery","title":"Bluetti B500K Expansion Battery, 5,120Wh LiFePO4, for Apex 300","description":"\u003cp\u003eThe Bluetti B500K is a 5,120Wh LiFePO4 expansion battery for the Bluetti Apex 300, nearly tripling a single unit's capacity. It's built for Apex 300 home backup systems and off-grid cabins that need multi-day runtime from one add-on battery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReal-world numbers:\u003c\/strong\u003e about 4,352Wh usable (rated Wh × 0.85). Paired with one Apex 300, that's about 6,700Wh usable:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eLoad\u003c\/th\u003e\n\u003cth\u003eRuntime, Apex 300 + 1 × B500K (RPC estimate)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cspan style=\"display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;min-width:34px;background:#eef4fb;color:#4078c0;margin-right:10px;vertical-align:middle;\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"22\" height=\"22\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.7\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"\u003e\u003crect x=\"6\" y=\"2\" width=\"12\" height=\"20\" rx=\"2\"\u003e\u003c\/rect\u003e\u003cpath d=\"M6 9h12M9 5v2M9 12v3\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003cspan style=\"vertical-align:middle;\"\u003eFull-size refrigerator (60W average)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003eabout 111 hrs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cspan style=\"display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;min-width:34px;background:#eef4fb;color:#4078c0;margin-right:10px;vertical-align:middle;\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"22\" height=\"22\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.7\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"\u003e\u003crect x=\"3\" y=\"8\" width=\"18\" height=\"12\" rx=\"2\"\u003e\u003c\/rect\u003e\u003cpath d=\"M3 12h18M8 8V5h8v3\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003cspan style=\"vertical-align:middle;\"\u003e12V compressor fridge (50W average)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003eabout 134 hrs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cspan style=\"display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;min-width:34px;background:#eef4fb;color:#4078c0;margin-right:10px;vertical-align:middle;\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"22\" height=\"22\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.7\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"\u003e\u003crect x=\"3\" y=\"13\" width=\"18\" height=\"7\" rx=\"2\"\u003e\u003c\/rect\u003e\u003cpath d=\"M7 13L5 7M17 13l2-6M7 16.5h.01M10.5 16.5h.01\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003cspan style=\"vertical-align:middle;\"\u003eWi-Fi router and modem (20W)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003eabout 335 hrs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cspan style=\"display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;min-width:34px;background:#eef4fb;color:#4078c0;margin-right:10px;vertical-align:middle;\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"22\" height=\"22\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.7\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"\u003e\u003crect x=\"4\" y=\"4\" width=\"16\" height=\"11\" rx=\"1\"\u003e\u003c\/rect\u003e\u003cpath d=\"M2 19h20\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003cspan style=\"vertical-align:middle;\"\u003eLaptop and monitor (100W)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003eabout 67 hrs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cspan style=\"display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;min-width:34px;background:#eef4fb;color:#4078c0;margin-right:10px;vertical-align:middle;\"\u003e\u003csvg viewbox=\"0 0 24 24\" width=\"22\" height=\"22\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.7\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"\u003e\u003crect x=\"2\" y=\"5\" width=\"20\" height=\"10\" rx=\"2\"\u003e\u003c\/rect\u003e\u003cpath d=\"M6 10h12M7 19c1-1.5 1-2.5 0-4M12 19c1-1.5 1-2.5 0-4M17 19c1-1.5 1-2.5 0-4\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\u003cspan style=\"vertical-align:middle;\"\u003eWindow AC, 5,000 BTU (500W running)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003eabout 13 hrs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eSize it for your own setup:\u003c\/strong\u003e pick your appliances and days off-grid in the \u003ca href=\"\/pages\/power-station-calculator\" title=\"RPC Power Calculator\"\u003eRPC Power Calculator\u003c\/a\u003e, and it shows the in-stock stations and kits that fit.\u003c\/p\u003e\n\u003cp\u003eIt connects with the included CA90 cable and can be wall-mounted, rack-mounted, or rolled on Bluetti's Foldable Trolley 2 (sold separately). An internal cooling fan manages heat during heavy draws. It's also compatible with the Bluetti AC300, AC500, AC200L and AC200MAX, and Bluetti rates it for over 4,000 cycles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Apex 300 home backup systems • Multi-day outage planning • Off-grid cabins with heavy daily use\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot the best fit if:\u003c\/strong\u003e you need to move it often. The B500K is meant to stay put, mounted on a wall or rack or rolled on a trolley. For a smaller add-on battery, look at the \u003ca href=\"\/products\/bluetti-b300k-expansion-battery\"\u003eB300K\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with:\u003c\/strong\u003e \u003ca href=\"\/products\/bluetti-apex-300-power-station\"\u003eApex 300\u003c\/a\u003e • \u003ca href=\"\/products\/bluetti-b300k-expansion-battery\"\u003eB300K expansion battery\u003c\/a\u003e • Bluetti AC300, AC500, AC200L and AC200MAX • Bluetti Foldable Trolley 2\u003c\/p\u003e\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eHow much runtime does the B500K add to an Apex 300?\u003c\/strong\u003e\u003cbr\u003eAbout 4,352Wh usable. With one Apex 300, a full-size fridge averaging 60W runs about 111 hours, over four days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eB500K or B300K?\u003c\/strong\u003e\u003cbr\u003eThe B500K holds about 85% more energy in one unit. The B300K is smaller and easier to stack. Both connect to the Apex 300 with a CA90 cable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mount it on a wall?\u003c\/strong\u003e\u003cbr\u003eYes. Bluetti designed it for wall mounting, rack mounting or Bluetti's Foldable Trolley 2.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWHY RPC?\u003c\/strong\u003e Genuine Bluetti product shipped directly from Bluetti's U.S. warehouses, see our sourcing documentation \u003ca href=\"https:\/\/reservepowerco.com\/pages\/product-authenticity\" target=\"_blank\" rel=\"noopener\"\u003ehere\u003c\/a\u003e. Free U.S. shipping. Price match guaranteed. Backed by Bluetti's manufacturer warranty, serviced directly by Bluetti with U.S.-based support. Register your product with Bluetti for extended coverage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Authenticity\u003c\/strong\u003e This is a genuine Bluetti product, supplied to Reserve Power Co. directly by BLUETTI POWER INC of Chino Hills, California, as an authorized Bluetti dealer. Shipped new from Bluetti in original manufacturer packaging with full manufacturer documentation. Verify our sourcing \u003ca href=\"https:\/\/reservepowerco.com\/pages\/product-authenticity\" target=\"_blank\" rel=\"noopener\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCapacity: 5,120Wh, LiFePO4\u003c\/li\u003e\n\u003cli\u003eBattery life: 4,000+ cycles\u003c\/li\u003e\n\u003cli\u003eCompatible with: Apex 300, AC300, AC500, AC200L, AC200MAX\u003c\/li\u003e\n\u003cli\u003eMounting: wall, rack, or Foldable Trolley 2 (sold separately)\u003c\/li\u003e\n\u003cli\u003eCooling: internal fan\u003c\/li\u003e\n\u003cli\u003eIn the box: B500K, CA90 battery expansion cable, documents\u003c\/li\u003e\n\u003cli\u003eWarranty: Bluetti manufacturer warranty; register for extended coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSpecifications shown are the manufacturer's published figures for this model. Product photography is supplied by the manufacturer and used with permission as an authorized dealer. Run-time estimates are Reserve Power Co.'s own, using rated Wh × 0.85.\u003c\/p\u003e","brand":"Bluetti","offers":[{"title":"Default Title","offer_id":67923089391901,"sku":"B500K","price":1912.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0976\/8330\/8829\/files\/B500K-1.webp?v=1793407447","url":"https:\/\/reservepowerco.com\/products\/bluetti-b500k-expansion-battery","provider":"Reserve Power Co.","version":"1.0","type":"link"}