{"product_id":"foxess-master-lfp-stakable-batteries-with-full-capacity-3-975kwh-cm4000-30-218-10103-00","title":"FoxESS Master LFP Stakable Batteries with full capacity 3.975kWh - CM4000 ( 30-218-10103-00 )","description":"\u003ch2\u003eFoxESS CM4000 master battery — 3.97 kWh high-voltage LFP module\u003c\/h2\u003e\n\u003cp data-start=\"311\" data-end=\"734\"\u003e\u003cstrong data-start=\"311\" data-end=\"360\"\u003eFoxESS Master LFP Stakable Batteries - CM4000\u003c\/strong\u003e are engineered to deliver reliable, scalable, and high-performance energy storage for modern residential and light commercial power systems. Designed with advanced lithium iron phosphate (LFP) technology, these batteries ensure safety, longevity, and consistent output, making them a smart investment for anyone looking to optimize energy usage and backup power efficiency.\u003c\/p\u003e\n\u003cp data-start=\"736\" data-end=\"961\"\u003eThe \u003ca href=\"https:\/\/www.portlandiaelectric.supply\/products\/foxess-master-lfp-stakable-batteries-with-full-capacity-3-975kwh-cm4000-30-218-10103-00\" target=\"_self\" title=\"\"\u003eFoxESS Master LFP Stakable Batteries with full capacity 3.975kWh - CM4000 ( 30-218-10103-00 )\u003c\/a\u003e provide a future-ready solution where performance, modular flexibility, and durability come together in one compact system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFoxESS CM4000 master battery\u003c\/strong\u003e is the controller + battery module of the ECS4000 stack. The nominal energy of this single module is 3.97 kWh; to make a complete stack, it is paired in series with CS4000 slave modules (max 1 CM + 6 CS, up to 27.8 kWh). \u003csup\u003e[datasheet\/manual]\u003c\/sup\u003e\u003c\/p\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFoxESS CM4000 master battery\u003c\/strong\u003e offers plug-and-play stack design, CAN BMS comms, outdoor-rated IP65 enclosure, \u0026gt;95% round-trip efficiency, and ≥6000 cycles @ 90% DoD—for clean, code-friendly installs with H1 hybrid inverters. \u003csup\u003e[datasheet\/manual]\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 charge\/discharge (continuous), 65 A peak (60 s)\u003c\/li\u003e\n\u003cli\u003eScalable stacks (ECS4000-H2…H7): 7.95–27.8 kWh · 115.2–403.2 V nominal\u003c\/li\u003e\n\u003cli\u003eIngress: IP65 · Operating temp: charge 0–55 °C, discharge −10–55 °C\u003c\/li\u003e\n\u003cli\u003eCertifications: UL1973, UL9540, UL9540A; UN38.3 transport\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ccaption\u003e\n\u003cstrong\u003eFoxESS CM4000 master battery\u003c\/strong\u003e — specification box\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003eModule (CM4000)\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\u003eRound-trip efficiency\u003c\/th\u003e\n\u003ctd\u003e\u0026gt;95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDepth of discharge\u003c\/th\u003e\n\u003ctd\u003e90% (typ.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCycle life\u003c\/th\u003e\n\u003ctd\u003e≥6000 cycles @ 25 °C, 90% DoD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIngress \/ environment\u003c\/th\u003e\n\u003ctd\u003eIP65 · −10 to 55 °C (discharge); 0 to 55 °C (charge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (L × W × H)\u003c\/th\u003e\n\u003ctd\u003e570 × 380 × 170 mm (≈22.44″ × 14.96″ × 6.69″)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e≈39 kg (≈86 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInterfaces\u003c\/th\u003e\n\u003ctd\u003eCAN BMS; LED status (SOC\/Alarm\/Run), DC switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eUL1973 · UL9540 · UL9540A · UN38.3\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 (1 CM + 4 CS)\u003c\/th\u003e\n\u003ctd\u003e19.87 kWh · 288 V (243–328.5 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eH6\/H7\u003c\/th\u003e\n\u003ctd\u003e23.85 \/ 27.82 kWh · 345.6 \/ 403.2 V (US market usually ≤ H5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor residential backup, TOU shifting, or hybrid PV systems, the \u003cstrong\u003eFoxESS CM4000 master battery\u003c\/strong\u003e provides a rugged, scalable foundation—future expansion is simple with CS4000 modules.\u003c\/p\u003e\n\u003ch2 data-start=\"1708\" data-end=\"1772\"\u003eKey Features of FoxESS Master LFP Stakable Batteries - CM4000\u003c\/h2\u003e\n\u003ch3 data-start=\"1774\" data-end=\"1813\"\u003eHigh Usable Capacity and Efficiency\u003c\/h3\u003e\n\u003cp data-start=\"1814\" data-end=\"2062\"\u003eEach unit delivers a full usable capacity of 3.975kWh, ensuring minimal energy loss and maximum efficiency. This makes the \u003cstrong data-start=\"1937\" data-end=\"1986\"\u003eFoxESS Master LFP Stakable Batteries - CM4000\u003c\/strong\u003e ideal for solar self-consumption, energy shifting, and backup applications.\u003c\/p\u003e\n\u003ch3 data-start=\"2064\" data-end=\"2092\"\u003eScalable Stakable Design\u003c\/h3\u003e\n\u003cp data-start=\"2093\" data-end=\"2353\"\u003eThe stakable design allows multiple \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Battery\" target=\"_blank\" title=\"\" rel=\"noopener\"\u003ebattery\u003c\/a\u003e modules to be connected vertically, saving floor space while increasing overall energy storage. Whether you need backup power for a small home or energy support for a commercial setup, the system scales effortlessly.\u003c\/p\u003e\n\u003ch3 data-start=\"2355\" data-end=\"2374\"\u003eLong Cycle Life\u003c\/h3\u003e\n\u003cp data-start=\"2375\" data-end=\"2570\"\u003eThanks to LFP cell technology, these batteries support thousands of charge and discharge cycles with minimal degradation. This ensures long-term reliability and lower cost of ownership over time.\u003c\/p\u003e\n\u003ch3 data-start=\"2572\" data-end=\"2613\"\u003eSmart Battery Management System (BMS)\u003c\/h3\u003e\n\u003cp data-start=\"2614\" data-end=\"2822\"\u003eAn integrated BMS continuously monitors voltage, temperature, and current to optimize performance and protect the system. The BMS enhances safety while ensuring balanced charging across all connected modules.\u003c\/p\u003e\n\u003ch2 data-start=\"2829\" data-end=\"2889\"\u003eWhy Choose FoxESS Master LFP Stakable Batteries - CM4000?\u003c\/h2\u003e\n\u003cp data-start=\"2891\" data-end=\"3247\"\u003eThe \u003cstrong data-start=\"2895\" data-end=\"2944\"\u003eFoxESS Master LFP Stakable Batteries - CM4000\u003c\/strong\u003e are designed for users who demand reliability, efficiency, and flexibility. Their full-capacity utilization ensures that every stored unit of energy is effectively used. With high compatibility across modern hybrid and off-grid systems, these batteries integrate seamlessly into existing energy setups.\u003c\/p\u003e\n\u003cp data-start=\"3249\" data-end=\"3500\"\u003eTheir compact footprint and vertical stacking capability make them suitable for installations where space is limited. Additionally, the robust enclosure design protects internal components, ensuring dependable operation even in demanding environments.\u003c\/p\u003e\n\u003ch2 data-start=\"3507\" data-end=\"3571\"\u003eApplications of FoxESS Master LFP Stakable Batteries - CM4000\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"3575\" data-end=\"3609\"\u003eResidential solar energy storage\u003c\/li\u003e\n\u003cli data-start=\"3612\" data-end=\"3634\"\u003eBackup power systems\u003c\/li\u003e\n\u003cli data-start=\"3637\" data-end=\"3659\"\u003ePeak load management\u003c\/li\u003e\n\u003cli data-start=\"3662\" data-end=\"3697\"\u003eOff-grid and hybrid installations\u003c\/li\u003e\n\u003cli data-start=\"3700\" data-end=\"3735\"\u003eLight commercial energy solutions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3737\" data-end=\"3905\"\u003eBy using \u003cstrong data-start=\"3746\" data-end=\"3795\"\u003eFoxESS Master LFP Stakable Batteries - CM4000\u003c\/strong\u003e, users can reduce grid dependency, improve energy independence, and maintain power continuity during outages.\u003c\/p\u003e\n\u003ch2 data-start=\"3912\" data-end=\"3951\"\u003eSafety and Reliability You Can Trust\u003c\/h2\u003e\n\u003cp data-start=\"3953\" data-end=\"4276\"\u003eSafety is a core advantage of the \u003cstrong data-start=\"3987\" data-end=\"4036\"\u003eFoxESS Master LFP Stakable Batteries - CM4000\u003c\/strong\u003e. LFP chemistry offers superior resistance to thermal runaway, while the advanced BMS ensures real-time protection against overcharging, deep discharge, and short circuits. This makes the system suitable for long-term, worry-free operation.\u003c\/p\u003e\n\u003ch2 data-start=\"4283\" data-end=\"4322\"\u003eFuture-Ready Energy Storage Solution\u003c\/h2\u003e\n\u003cp data-start=\"4324\" data-end=\"4603\"\u003eAs energy needs grow, the \u003cstrong data-start=\"4350\" data-end=\"4399\"\u003eFoxESS Master LFP Stakable Batteries - CM4000\u003c\/strong\u003e remain adaptable. Their modular design ensures that expanding storage capacity is simple and cost-effective. This future-ready approach makes them an excellent choice for evolving energy infrastructures.\u003c\/p\u003e","brand":"FoxESS","offers":[{"title":"Default Title","offer_id":42500723835014,"sku":"PES-ESS-BTS-0246","price":2083.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0613\/5188\/6982\/files\/CM4000_900x_abbc3163-41e7-4e7a-89af-07f1a48165fc.jpg?v=1760382010","url":"https:\/\/www.portlandiaelectric.supply\/products\/foxess-master-lfp-stakable-batteries-with-full-capacity-3-975kwh-cm4000-30-218-10103-00","provider":"Portlandia Electric Supply","version":"1.0","type":"link"}