{"product_id":"ethos-20-2kwh-stackable-battery-4-module","title":"BigBattery Ethos 20.2kWh Stackable Battery (4 Module) - FREE SHIPPING","description":"\u003cp data-start=\"323\" data-end=\"704\"\u003eThe Ethos 20.2 kWh Stackable Battery System is a powerful, modular, and expandable energy-storage solution designed to deliver large-scale performance for full-home backup, off-grid systems, and commercial energy applications. Combining four 5.12 kWh modules, this system offers high energy density, long cycle life, and seamless integration with hybrid and off-grid inverters.\u003c\/p\u003e \u003ch3 data-start=\"706\" data-end=\"722\"\u003eKey Features\u003c\/h3\u003e \u003cul data-start=\"723\" data-end=\"1273\"\u003e \u003cli data-start=\"723\" data-end=\"814\"\u003e \u003cp data-start=\"725\" data-end=\"814\"\u003eQuad-Module Configuration: Delivers 20.48 kWh of usable capacity at 51.2 V nominal.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"815\" data-end=\"926\"\u003e \u003cp data-start=\"817\" data-end=\"926\"\u003eSafe \u0026amp; Durable LiFePO₄ Chemistry: Long cycle life, superior thermal stability, and minimal maintenance.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"927\" data-end=\"1049\"\u003e \u003cp data-start=\"929\" data-end=\"1049\"\u003eSmart Power Management: Integrated BMS with CANBus\/RS485 ensures real-time monitoring and safe parallel operation.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1050\" data-end=\"1165\"\u003e \u003cp data-start=\"1052\" data-end=\"1165\"\u003ePre-Assembled Stack with Control Box: Simplifies wiring and inverter connectivity for faster installations.\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"1166\" data-end=\"1273\"\u003e \u003cp data-start=\"1168\" data-end=\"1273\"\u003eIP65 Enclosure: Built for indoor or semi-outdoor environments with resistance to dust and moisture.\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"1280\" data-end=\"1300\"\u003eProduct Overview\u003c\/h3\u003e \u003cp data-start=\"1302\" data-end=\"1666\"\u003eThe Ethos 20.2 kWh system combines four Ethos 51.2 V 100 Ah lithium-iron-phosphate (LiFePO₄) modules in parallel to create a unified storage solution that’s as safe as it is scalable. Designed for both residential and commercial energy storage, this configuration provides a total capacity of 20.48 kWh with excellent energy efficiency and reliable output.\u003c\/p\u003e \u003cp data-start=\"1668\" data-end=\"2051\"\u003eEach Ethos module features its own Battery Management System (BMS) for precision control, communication, and protection. When stacked, the modules communicate with a central Ethos Control Box, which manages inverter connections through pre-terminated power and communication cables. This architecture minimizes installation complexity and ensures each stack operates in sync.\u003c\/p\u003e \u003cp data-start=\"2053\" data-end=\"2354\"\u003eThanks to its LiFePO₄ chemistry, this system achieves exceptional longevity — rated for 4,000 – 8,000 cycles at 80 % depth of discharge — and maintains over 95 % round-trip efficiency. The robust IP65 housing allows for flexible installation in basements, garages, or protected outdoor structures.\u003c\/p\u003e \u003cp data-start=\"2356\" data-end=\"2534\"\u003eEngineered for expandability, the 20.2 kWh Ethos stack can be scaled up with additional modules and control boxes, offering long-term adaptability for growing power requirements.\u003c\/p\u003e \u003ch3 data-start=\"2541\" data-end=\"2571\"\u003eTechnical Specifications\u003c\/h3\u003e \u003cdiv\u003e \u003cdiv tabindex=\"-1\"\u003e \u003ctable data-start=\"2573\" data-end=\"3700\"\u003e \u003cthead data-start=\"2573\" data-end=\"2600\"\u003e \u003ctr data-start=\"2573\" data-end=\"2600\"\u003e \u003cth data-start=\"2573\" data-end=\"2589\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e \u003cth data-start=\"2589\" data-end=\"2600\" data-col-size=\"md\"\u003eDetails\u003c\/th\u003e \u003c\/tr\u003e \u003c\/thead\u003e \u003ctbody data-start=\"2631\" data-end=\"3700\"\u003e \u003ctr data-start=\"2631\" data-end=\"2677\"\u003e \u003ctd data-start=\"2631\" data-end=\"2647\" data-col-size=\"sm\"\u003eConfiguration\u003c\/td\u003e \u003ctd data-start=\"2647\" data-end=\"2677\" data-col-size=\"md\"\u003e4 × Ethos 5.12 kWh Modules\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2678\" data-end=\"2706\"\u003e \u003ctd data-start=\"2678\" data-end=\"2696\" data-col-size=\"sm\"\u003eNominal Voltage\u003c\/td\u003e \u003ctd data-start=\"2696\" data-end=\"2706\" data-col-size=\"md\"\u003e51.2 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2707\" data-end=\"2740\"\u003e \u003ctd data-start=\"2707\" data-end=\"2724\" data-col-size=\"sm\"\u003eSystem Voltage\u003c\/td\u003e \u003ctd data-start=\"2724\" data-end=\"2740\" data-col-size=\"md\"\u003e48 V nominal\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2741\" data-end=\"2780\"\u003e \u003ctd data-start=\"2741\" data-end=\"2758\" data-col-size=\"sm\"\u003eTotal Capacity\u003c\/td\u003e \u003ctd data-start=\"2758\" data-end=\"2780\" data-col-size=\"md\"\u003e20.48 kWh (400 Ah)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2781\" data-end=\"2814\"\u003e \u003ctd data-start=\"2781\" data-end=\"2802\" data-col-size=\"sm\"\u003eCell Configuration\u003c\/td\u003e \u003ctd data-start=\"2802\" data-end=\"2814\" data-col-size=\"md\"\u003e16S × 4P\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2815\" data-end=\"2855\"\u003e \u003ctd data-start=\"2815\" data-end=\"2840\" data-col-size=\"sm\"\u003eCharging Voltage Range\u003c\/td\u003e \u003ctd data-start=\"2840\" data-end=\"2855\" data-col-size=\"md\"\u003e55.6 – 57 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2856\" data-end=\"2889\"\u003e \u003ctd data-start=\"2856\" data-end=\"2881\" data-col-size=\"sm\"\u003eMaximum Charge Voltage\u003c\/td\u003e \u003ctd data-start=\"2881\" data-end=\"2889\" data-col-size=\"md\"\u003e57 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2890\" data-end=\"2929\"\u003e \u003ctd data-start=\"2890\" data-end=\"2916\" data-col-size=\"sm\"\u003eOperating Voltage Range\u003c\/td\u003e \u003ctd data-start=\"2916\" data-end=\"2929\" data-col-size=\"md\"\u003e48 – 57 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2930\" data-end=\"2976\"\u003e \u003ctd data-start=\"2930\" data-end=\"2961\" data-col-size=\"sm\"\u003eSuggested Low Voltage Cutoff\u003c\/td\u003e \u003ctd data-start=\"2961\" data-end=\"2976\" data-col-size=\"md\"\u003e48 – 50.8 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"2977\" data-end=\"3021\"\u003e \u003ctd data-start=\"2977\" data-end=\"3012\" data-col-size=\"sm\"\u003eMax Continuous Discharge Current\u003c\/td\u003e \u003ctd data-start=\"3012\" data-end=\"3021\" data-col-size=\"md\"\u003e200 A\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3022\" data-end=\"3064\"\u003e \u003ctd data-start=\"3022\" data-end=\"3047\" data-col-size=\"sm\"\u003ePeak Discharge Current\u003c\/td\u003e \u003ctd data-start=\"3047\" data-end=\"3064\" data-col-size=\"md\"\u003e300 A (≤ 5 s)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3065\" data-end=\"3095\"\u003e \u003ctd data-start=\"3065\" data-end=\"3086\" data-col-size=\"sm\"\u003eMax Charge Current\u003c\/td\u003e \u003ctd data-start=\"3086\" data-end=\"3095\" data-col-size=\"md\"\u003e200 A\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3096\" data-end=\"3130\"\u003e \u003ctd data-start=\"3096\" data-end=\"3120\" data-col-size=\"sm\"\u003eRound-Trip Efficiency\u003c\/td\u003e \u003ctd data-start=\"3120\" data-end=\"3130\" data-col-size=\"md\"\u003e≥ 95 %\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3131\" data-end=\"3179\"\u003e \u003ctd data-start=\"3131\" data-end=\"3143\" data-col-size=\"sm\"\u003eChemistry\u003c\/td\u003e \u003ctd data-start=\"3143\" data-end=\"3179\" data-col-size=\"md\"\u003eLithium Iron Phosphate (LiFePO₄)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3180\" data-end=\"3228\"\u003e \u003ctd data-start=\"3180\" data-end=\"3193\" data-col-size=\"sm\"\u003eCycle Life\u003c\/td\u003e \u003ctd data-start=\"3193\" data-end=\"3228\" data-col-size=\"md\"\u003e4,000 – 8,000 cycles @ 80 % DoD\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3229\" data-end=\"3263\"\u003e \u003ctd data-start=\"3229\" data-end=\"3245\" data-col-size=\"sm\"\u003eCommunication\u003c\/td\u003e \u003ctd data-start=\"3245\" data-end=\"3263\" data-col-size=\"md\"\u003eCANBus \/ RS485\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3264\" data-end=\"3291\"\u003e \u003ctd data-start=\"3264\" data-end=\"3283\" data-col-size=\"sm\"\u003eEnclosure Rating\u003c\/td\u003e \u003ctd data-start=\"3283\" data-end=\"3291\" data-col-size=\"md\"\u003eIP65\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3292\" data-end=\"3345\"\u003e \u003ctd data-start=\"3292\" data-end=\"3312\" data-col-size=\"sm\"\u003eCharge Temp Range\u003c\/td\u003e \u003ctd data-start=\"3312\" data-end=\"3345\" data-col-size=\"md\"\u003e0 °C – 45 °C (32 °F – 113 °F)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3346\" data-end=\"3404\"\u003e \u003ctd data-start=\"3346\" data-end=\"3369\" data-col-size=\"sm\"\u003eDischarge Temp Range\u003c\/td\u003e \u003ctd data-start=\"3369\" data-end=\"3404\" data-col-size=\"md\"\u003e–20 °C – 60 °C (–4 °F – 140 °F)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3405\" data-end=\"3468\"\u003e \u003ctd data-start=\"3405\" data-end=\"3433\" data-col-size=\"sm\"\u003eStorage Temp (SOC \u0026gt; 50 %)\u003c\/td\u003e \u003ctd data-start=\"3433\" data-end=\"3468\" data-col-size=\"md\"\u003e–20 °C – 45 °C (–4 °F – 113 °F)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3469\" data-end=\"3546\"\u003e \u003ctd data-start=\"3469\" data-end=\"3500\" data-col-size=\"sm\"\u003eDimensions (approx. stacked)\u003c\/td\u003e \u003ctd data-start=\"3500\" data-end=\"3546\" data-col-size=\"md\"\u003e170 × 674 × 2000 mm (6.7 × 26.5 × 78.7 in)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3547\" data-end=\"3596\"\u003e \u003ctd data-start=\"3547\" data-end=\"3574\" data-col-size=\"sm\"\u003eWeight (approx. stacked)\u003c\/td\u003e \u003ctd data-start=\"3574\" data-end=\"3596\" data-col-size=\"md\"\u003e≈ 230 kg (507 lbs)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3597\" data-end=\"3641\"\u003e \u003ctd data-start=\"3597\" data-end=\"3614\" data-col-size=\"sm\"\u003eCertifications\u003c\/td\u003e \u003ctd data-start=\"3614\" data-end=\"3641\" data-col-size=\"md\"\u003eUL9540A, UL1973, UN38.3\u003c\/td\u003e \u003c\/tr\u003e \u003ctr data-start=\"3642\" data-end=\"3700\"\u003e \u003ctd data-start=\"3642\" data-end=\"3667\" data-col-size=\"sm\"\u003eDesign Life \/ Warranty\u003c\/td\u003e \u003ctd data-start=\"3667\" data-end=\"3700\" data-col-size=\"md\"\u003e10 + years \/ 10-year warranty\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003c\/div\u003e \u003ch3 data-start=\"3707\" data-end=\"3728\"\u003e\u003c\/h3\u003e \u003ch3 data-start=\"3707\" data-end=\"3728\"\u003eIncluded in Kit\u003c\/h3\u003e \u003cp data-start=\"3730\" data-end=\"3761\"\u003eETHOS 20.2 kWh (4 Module)\u003c\/p\u003e \u003cp data-start=\"3763\" data-end=\"3785\"\u003eIncluded in Kit:\u003c\/p\u003e \u003cul data-start=\"3786\" data-end=\"4052\"\u003e \u003cli data-start=\"3786\" data-end=\"3841\"\u003e \u003cp data-start=\"3788\" data-end=\"3841\"\u003e(4) FETHS-48051-G1 – 5.12 kWh Ethos Battery Modules\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"3842\" data-end=\"3876\"\u003e \u003cp data-start=\"3844\" data-end=\"3876\"\u003e(1) CNT060 – Ethos Control Box\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"3877\" data-end=\"3916\"\u003e \u003cp data-start=\"3879\" data-end=\"3916\"\u003e(1) CNT081 – Ethos Base (Base Only)\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"3917\" data-end=\"3988\"\u003e \u003cp data-start=\"3919\" data-end=\"3988\"\u003e(2) CBL089 – Ethos Stack-to-Stack Power Cable Pair 4.9 ft (1500 mm)\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"3989\" data-end=\"4052\"\u003e \u003cp data-start=\"3991\" data-end=\"4052\"\u003e(1) CBL090 – Ethos Stack-to-Stack Comm Cable 4.9 ft (1500 mm)\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e \u003ch3 data-start=\"4059\" data-end=\"4077\"\u003eApplications\u003c\/h3\u003e \u003cul data-start=\"4078\" data-end=\"4277\"\u003e \u003cli data-start=\"4078\" data-end=\"4120\"\u003e \u003cp data-start=\"4080\" data-end=\"4120\"\u003eWhole-home backup and off-grid systems\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"4121\" data-end=\"4169\"\u003e \u003cp data-start=\"4123\" data-end=\"4169\"\u003eCommercial solar storage and load-management\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"4170\" data-end=\"4223\"\u003e \u003cp data-start=\"4172\" data-end=\"4223\"\u003eHybrid solar installations with high demand loads\u003c\/p\u003e \u003c\/li\u003e \u003cli data-start=\"4224\" data-end=\"4277\"\u003e \u003cp data-start=\"4226\" data-end=\"4277\"\u003eExpandable microgrids and community power systems\u003c\/p\u003e \u003c\/li\u003e \u003c\/ul\u003e","brand":"BigBattery","offers":[{"title":"Default Title","offer_id":55064591466835,"sku":"ETHOS20.2","price":2811.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1076\/9324\/4755\/files\/OIP_1.jpg?v=1790371600","url":"https:\/\/progradewarehouse.com\/products\/ethos-20-2kwh-stackable-battery-4-module","provider":"PRO GRADE WAREHOUSE","version":"1.0","type":"link"}