{"product_id":"foxess-sub-lfp-stakable-batteries-with-full-capacity-3-975kwh-cs4000-30-218-20103-00","title":"FoxESS Sub LFP Stakable Batteries with full capacity 3.975kWh - CS4000 ( 30-218-20103-00 )","description":"\u003ch2\u003eFoxESS CS4000 battery — 3.97 kWh high-voltage LFP sub module\u003c\/h2\u003e\n\u003cp data-start=\"381\" data-end=\"829\"\u003e\u003cstrong data-start=\"381\" data-end=\"427\"\u003eFoxESS Sub LFP Stakable Batteries – CS4000\u003c\/strong\u003e are engineered to provide reliable and scalable energy storage for residential and light commercial use. These batteries feature advanced lithium iron phosphate (LFP) technology, which ensures enhanced safety and consistent performance. Ideal for solar self-consumption and backup power, this system offers a flexible, future-ready energy solution.\u003c\/p\u003e\n\u003cp data-start=\"831\" data-end=\"1067\"\u003eThe \u003ca href=\"https:\/\/www.portlandiaelectric.supply\/products\/foxess-sub-lfp-stakable-batteries-with-full-capacity-3-975kwh-cs4000-30-218-20103-00\" target=\"_self\" title=\"\"\u003eFoxESS Sub LFP Stakable Batteries with full capacity 3.975kWh – CS4000 ( 30-218-20103-00 \u003cstrong data-start=\"835\" data-end=\"929\"\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003cstrong data-start=\"835\" data-end=\"929\"\u003e)\u003c\/strong\u003e feature a modular design. This allows users to expand storage capacity easily as their energy needs increase, without replacing the entire system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFoxESS CS4000 battery\u003c\/strong\u003e is the slave\/sub module of the ECS4000 stack. It pairs with the CM4000 master, with each CS module adding about 3.97 kWh, creating a plug-and-play series stack.\u003c\/p\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFoxESS CS4000 battery\u003c\/strong\u003e offers CAN-based BMS communication, ≥6000 cycles at 90% DoD, IP65-rated outdoor enclosure, and 50 A charge\/discharge capability. This makes it perfect for clean and scalable installations with FoxESS H1 hybrid inverters. \u003csup\u003e[manual\/datasheet]\u003c\/sup\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnergy: 3.97 kWh (57.6 V, 69 Ah); voltage range 48.6–65.7 V\u003c\/li\u003e\n\u003cli\u003eCurrent: 50 A continuous (charge\/discharge), 65 A peak (60 s)\u003c\/li\u003e\n\u003cli\u003eStacks: 1 CM + 1–6 CS ⇒ 7.95–27.8 kWh · 115.2–403.2 V nominal\u003c\/li\u003e\n\u003cli\u003eIngress \u0026amp; environment: IP65 · charge 0–55 °C · discharge −10–55 °C\u003c\/li\u003e\n\u003cli\u003eCertifications: UL1973 · UL9540 · UL9540A · UN38.3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ccaption\u003e\n\u003cstrong\u003eFoxESS CS4000 battery\u003c\/strong\u003e — specification box\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eModule (CS4000)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChemistry\u003c\/th\u003e\n\u003ctd\u003eLiFePO₄ prismatic cells\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNominal energy \/ voltage \/ capacity\u003c\/th\u003e\n\u003ctd\u003e3.97 kWh · 57.6 V · 69 Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVoltage range\u003c\/th\u003e\n\u003ctd\u003e48.6–65.7 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCharge \/ discharge current\u003c\/th\u003e\n\u003ctd\u003e50 A continuous · 65 A (60 s) peak\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (L × W × H)\u003c\/th\u003e\n\u003ctd\u003e570 × 380 × 155 mm (≈22.44″ × 14.96″ × 6.10″)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e≈35 kg (≈77 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInterfaces\u003c\/th\u003e\n\u003ctd\u003eCAN BMS; LED status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIngress \/ warranty\u003c\/th\u003e\n\u003ctd\u003eIP65 · 12.5-year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eSystem (ECS4000 stack examples)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eH2 (1 CM + 1 CS)\u003c\/th\u003e\n\u003ctd\u003e7.95 kWh · 115.2 V (97.2–131.4 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eH3 (1 CM + 2 CS)\u003c\/th\u003e\n\u003ctd\u003e11.92 kWh · 172.8 V (145.8–197.1 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eH4 (1 CM + 3 CS)\u003c\/th\u003e\n\u003ctd\u003e15.90 kWh · 230.4 V (194.4–262.8 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eH5\/H6\/H7\u003c\/th\u003e\n\u003ctd\u003e19.87 \/ 23.85 \/ 27.82 kWh · 288 \/ 345.6 \/ 403.2 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor residential backup, TOU shifting, and hybrid PV stacks, the \u003cstrong\u003eFoxESS CS4000 battery\u003c\/strong\u003e acts as a rugged, scalable building block. Expansion is seamless with the CM4000 master.\u003c\/p\u003e\n\u003ch2 data-start=\"1074\" data-end=\"1131\"\u003eWhy Choose FoxESS Sub LFP Stakable Batteries - CS4000?\u003c\/h2\u003e\n\u003cp data-start=\"1133\" data-end=\"1359\"\u003eEnergy storage is essential today for independence and efficiency. These \u003cstrong data-start=\"1230\" data-end=\"1276\"\u003eFoxESS Sub LFP Stakable Batteries - CS4000\u003c\/strong\u003e are built for precision and reliability to meet these evolving needs.\u003c\/p\u003e\n\u003ch3 data-start=\"1361\" data-end=\"1408\"\u003eFull Usable Capacity for Maximum Efficiency\u003c\/h3\u003e\n\u003cp data-start=\"1409\" data-end=\"1670\"\u003eUnlike typical batteries that limit usable energy, the CS4000 delivers \u003cstrong data-start=\"1488\" data-end=\"1512\"\u003e100% usable capacity\u003c\/strong\u003e from its 3.975 kWh storage. This ensures maximum energy availability for better system efficiency.\u003c\/p\u003e\n\u003ch3 data-start=\"1672\" data-end=\"1707\"\u003eAdvanced LFP Battery Technology\u003c\/h3\u003e\n\u003cp data-start=\"1708\" data-end=\"1842\"\u003eLithium Iron Phosphate chemistry offers superior thermal stability and longer life cycles. The system includes:\u003c\/p\u003e\n\u003cul data-start=\"1843\" data-end=\"1984\"\u003e\n\u003cli data-start=\"1843\" data-end=\"1893\"\u003e\n\u003cp data-start=\"1845\" data-end=\"1893\"\u003eImproved safety with reduced overheating risks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1894\" data-end=\"1939\"\u003e\n\u003cp data-start=\"1896\" data-end=\"1939\"\u003eExtended cycle life for reliable performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1940\" data-end=\"1984\"\u003e\n\u003cp data-start=\"1942\" data-end=\"1984\"\u003eConsistent power output through cycles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1986\" data-end=\"2102\"\u003eThese advantages make the battery ideal for long-term energy storage needs.\u003c\/p\u003e\n\u003ch2 data-start=\"2109\" data-end=\"2157\"\u003eModular \u0026amp; Stackable Design for Scalable Power\u003c\/h2\u003e\n\u003ch3 data-start=\"2159\" data-end=\"2195\"\u003eEasily Expandable Energy Storage\u003c\/h3\u003e\n\u003cp data-start=\"2196\" data-end=\"2434\"\u003eThe stackable design allows easy addition of battery modules, boosting capacity vertically without complex rewiring or extra floor space.\u003c\/p\u003e\n\u003cp data-start=\"2436\" data-end=\"2465\"\u003eThis modularity suits:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"2468\" data-end=\"2507\"\u003eHomes planning solar expansions\u003c\/li\u003e\n\u003cli data-start=\"2510\" data-end=\"2550\"\u003eGrowing commercial energy needs\u003c\/li\u003e\n\u003cli data-start=\"2553\" data-end=\"2596\"\u003eFlexible backup systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"2598\" data-end=\"2640\"\u003eSpace-Efficient and Clean Installation\u003c\/h3\u003e\n\u003cp data-start=\"2641\" data-end=\"2849\"\u003eThe compact form fits well into garages, utility rooms, or cabinets. This setup saves space and eases maintenance and system upgrades.\u003c\/p\u003e\n\u003ch2 data-start=\"2856\" data-end=\"2899\"\u003eSeamless Integration with Energy Systems\u003c\/h2\u003e\n\u003cp data-start=\"2901\" data-end=\"3233\"\u003eThese batteries work with modern inverter systems, ensuring smooth communication and optimized power management. Advanced \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Battery_management_system\" target=\"_blank\" title=\"\" rel=\"noopener\"\u003ebattery management systems\u003c\/a\u003e monitor voltage, temperature, and charge status for safe operation.\u003c\/p\u003e\n\u003cp data-start=\"3235\" data-end=\"3269\"\u003eIntelligent control enhances:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"3272\" data-end=\"3290\"\u003eBattery lifespan\u003c\/li\u003e\n\u003cli data-start=\"3293\" data-end=\"3313\"\u003eSystem reliability\u003c\/li\u003e\n\u003cli data-start=\"3316\" data-end=\"3343\"\u003eOverall energy efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"3350\" data-end=\"3396\"\u003eBuilt for Safety, Durability, and Longevity\u003c\/h2\u003e\n\u003cp data-start=\"3398\" data-end=\"3701\"\u003eSafety is a core feature due to the integrated BMS that protects against overcharge, deep discharge, overheating, and shorts. Combined with robust LFP chemistry, this creates a durable system for daily use.\u003c\/p\u003e\n\u003cp data-start=\"3703\" data-end=\"3831\"\u003eWith thousands of cycles and low degradation, the CS4000 is a dependable energy security investment.\u003c\/p\u003e\n\u003ch2 data-start=\"3838\" data-end=\"3906\"\u003eIdeal Applications for FoxESS Sub LFP Stakable Batteries – CS4000\u003c\/h2\u003e\n\u003cp data-start=\"3908\" data-end=\"3992\"\u003eThis battery system suits various energy storage needs, such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"3995\" data-end=\"4029\"\u003eResidential solar storage\u003c\/li\u003e\n\u003cli data-start=\"4032\" data-end=\"4061\"\u003eBackup power during outages\u003c\/li\u003e\n\u003cli data-start=\"4064\" data-end=\"4096\"\u003eLoad shifting and peak shaving\u003c\/li\u003e\n\u003cli data-start=\"4099\" data-end=\"4132\"\u003eSmall commercial energy systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4134\" data-end=\"4219\"\u003eIts scalable design adapts effortlessly to changing energy usage patterns.\u003c\/p\u003e\n\u003ch2 data-start=\"4226\" data-end=\"4265\"\u003eFuture-Ready Energy Storage Solution with FoxESS Sub LFP Stakable Batteries – CS4000\u003c\/h2\u003e\n\u003cp data-start=\"4267\" data-end=\"4531\"\u003eAs energy costs rise and renewable energy use expands, dependable storage is key. The \u003cstrong data-start=\"4370\" data-end=\"4416\"\u003eFoxESS Sub LFP Stakable Batteries - CS4000\u003c\/strong\u003e offer a smart, safe, and scalable choice built for sustainable energy goals. They meet today's demands and anticipate future growth.\u003c\/p\u003e\n\u003cp\u003eFor those searching for quick meal options like \u003cstrong\u003ejersey mike's near me\u003c\/strong\u003e, or looking for orders at \u003cstrong\u003esubs near me\u003c\/strong\u003e or \u003cstrong\u003efirehouse subs near me\u003c\/strong\u003e, this system offers energy that supports a lifestyle on the move.\u003c\/p\u003e","brand":"FoxESS","offers":[{"title":"Default Title","offer_id":42500723867782,"sku":"PES-ESS-BTS-0247","price":1843.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0613\/5188\/6982\/files\/CS4000_900x_4f14497e-5869-427d-82c0-3404f0df2264.jpg?v=1760382010","url":"https:\/\/www.portlandiaelectric.supply\/products\/foxess-sub-lfp-stakable-batteries-with-full-capacity-3-975kwh-cs4000-30-218-20103-00","provider":"Portlandia Electric Supply","version":"1.0","type":"link"}