{"product_id":"endurenergy-esp-bu20-20-48kwh-pack-bms","title":"EndurEnergy Residential Storage Product - 20.48 kWh - Pack \u0026 BMS ESP-BU20","description":"\u003ch2\u003eEndurEnergy ESP-BU20 — 20.48 kWh Battery Pack + BMS (LFP, 51.2 V)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat’s included:\u003c\/strong\u003e Outdoor cabinet with integrated \u003cstrong\u003eBMS\u003c\/strong\u003e and \u003cstrong\u003e4 × ESP-5100\u003c\/strong\u003e LFP battery packs (5.12 kWh each) wired in parallel.\u003c\/p\u003e\n\u003ch2\u003eWhy ESP-BU20\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e20.48 kWh usable class\u003c\/strong\u003e from four 5.12 kWh LFP packs; scalable in 5.12 kWh steps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor-rated cabinet (IP55)\u003c\/strong\u003e with steel, powder-coated construction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed-loop compatible\u003c\/strong\u003e with popular \u003ca href=\"https:\/\/www.portlandiaelectric.supply\/collections\/hybrid-inverters\" target=\"_blank\" title=\"\" rel=\"noopener\"\u003ehybrid inverters\u003c\/a\u003e (e.g., Sol-Ark family).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-year warranty\u003c\/strong\u003e; long-life LFP chemistry (≥6,000 cycles at recommended DoD).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Specs\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEnergy\u003c\/th\u003e\n\u003ctd\u003e20.48 kWh (4 × 5.12 kWh ESP-5100)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChemistry\u003c\/th\u003e\n\u003ctd\u003eLithium Iron Phosphate (LFP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNominal \/ Working Voltage\u003c\/th\u003e\n\u003ctd\u003e51.2 V \/ 48–56 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended C-rate\u003c\/th\u003e\n\u003ctd\u003e0.5 C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRound-trip efficiency\u003c\/th\u003e\n\u003ctd\u003eUp to 97%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended DoD\u003c\/th\u003e\n\u003ctd\u003e90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCycle life\u003c\/th\u003e\n\u003ctd\u003e≈6,000 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnclosure rating\u003c\/th\u003e\n\u003ctd\u003eIP55 (outdoor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (H × W × D)\u003c\/th\u003e\n\u003ctd\u003e48.2″ × 22.9″ × 14.1″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e≈535.7 lb (4-pack configuration); enclosure: ≈130 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eUL 9540, UL 1973, CEC \u0026amp; SGIP \u003cem\u003e(per datasheet status)\u003c\/em\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eDocuments \u0026amp; Product Pages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/endurenergy.com\/esp-bu20-20\/\" target=\"_blank\" rel=\"noopener\"\u003eEndurEnergy — ESP-BU20 product page\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/endurenergy.com\/wp-content\/uploads\/2025\/04\/Spec-Sheet-Rev-C-BU20.pdf\" target=\"_blank\" rel=\"noopener\"\u003eESP-BU20 Spec Sheet (Rev C)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sunwatts.com\/content\/specs\/DataSheet_ESP-5100.pdf\" target=\"_blank\" rel=\"noopener\"\u003eESP-5100 Module Datasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EndurEnergy","offers":[{"title":"Default Title","offer_id":42990134657158,"sku":"PES-ESS-BTS-0353","price":14927.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0613\/5188\/6982\/files\/EndurEnergy-ESP-BU20-2T.jpg?v=1765721938","url":"https:\/\/www.portlandiaelectric.supply\/products\/endurenergy-esp-bu20-20-48kwh-pack-bms","provider":"Portlandia Electric Supply","version":"1.0","type":"link"}