{"product_id":"fox-eq4800-4-66kwh-hv-battery-master","title":"Fox EQ4800 4.66kWh HV Battery Master","description":"\u003c!-- SEO Product Name: Fox EQ4800 4.66kWh HV Battery Master — FE-HV-EQM-4800 (EQM4800) --\u003e\n\u003cdiv style=\"font-size: 16px; font-family: Arial,Helvetica,sans-serif; color: #1a1a1a; max-width: 900px; margin: 0 auto; line-height: 1.6;\"\u003e\n\u003cp style=\"margin: 0 0 18px;\"\u003eThe \u003cstrong\u003eFox EQ4800 4.66 kWh High Voltage Battery Master (FE-HV-EQM-4800 \/ EQM4800)\u003c\/strong\u003e is the next-generation Master module for Fox ESS high-voltage battery stacks, and the \u003cstrong\u003edirect replacement for the ECM4800\u003c\/strong\u003e. Like its predecessor, it contains the Battery Management System and serves as the communications hub for the stack — but the EQ4800 upgrades the DoD to \u003cstrong\u003e100% depth of discharge\u003c\/strong\u003e, delivering fully usable stored energy and a larger maximum stack capacity of \u003cstrong\u003e41.93 kWh\u003c\/strong\u003e (1 Master + 8 Slaves). Built on \u003cstrong\u003eLFP (LiFePO₄) chemistry\u003c\/strong\u003e, it achieves \u003cstrong\u003e\u0026gt;95% round-trip efficiency\u003c\/strong\u003e and \u003cstrong\u003e≥6,000 cycle life\u003c\/strong\u003e, with \u003cstrong\u003eIP65 protection\u003c\/strong\u003e for indoor or outdoor installation. EQ4800 Slave modules (FE-HV-EQS-4800) can also be mixed with legacy EC4800 systems (maximum 7 modules when mixed).\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 100px; background: #008377CF; color: #fff; border-radius: 6px; padding: 12px 10px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold;\"\u003e4.66 kWh\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 3px;\"\u003ePer module\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 100px; background: #008377CF; color: #fff; border-radius: 6px; padding: 12px 10px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold;\"\u003e\n\u003cspan style=\"font-size: 14px;\"\u003eNEW\u003c\/span\u003e 100% DoD\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 3px;\"\u003eFull capacity usable\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 100px; background: #008377CF; color: #fff; border-radius: 6px; padding: 12px 10px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold;\"\u003e\u0026gt;95%\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 3px;\"\u003eRound-trip efficiency\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 100px; background: #008377CF; color: #fff; border-radius: 6px; padding: 12px 10px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold;\"\u003e41.93 kWh\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 3px;\"\u003eMax stack capacity\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 100px; background: #008377CF; color: #fff; border-radius: 6px; padding: 12px 10px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold;\"\u003e10×3 yr\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 3px;\"\u003eWarranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #c0392b; background: #fff5f5; padding: 10px 16px; margin-bottom: 14px; border-radius: 0 6px 6px 0;\"\u003e\n\u003cstrong style=\"color: #c0392b;\"\u003e⚠ Installer Note\u003c\/strong\u003e — Must be installed by a \u003cstrong\u003equalified electrician or MCS-accredited installer\u003c\/strong\u003e. High-voltage DC battery system. Register the install on the Fox ESS portal to activate the full warranty terms.\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #f59e0b; background: #fff8e1; padding: 10px 16px; margin-bottom: 22px; border-radius: 0 6px 6px 0;\"\u003e\n\u003cstrong style=\"color: #b45309;\"\u003e⚡ System Requirements \u0026amp; Compatibility\u003c\/strong\u003e — \u003cstrong\u003eA minimum of 1× EQM4800 Master + 1× EQS4800 Slave is required.\u003c\/strong\u003e Maximum 9 modules per stack (1 Master + 8 Slaves). The EQ4800 is the \u003cstrong\u003edirect replacement for the ECM4800\u003c\/strong\u003e — same specification, updated firmware. EQ4800 Slave modules can be mixed with legacy EC4800 systems (limited to 7 total modules when mixed). Compatible with Fox H1, KH1, and AIO hybrid inverter ranges.\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: 600; font-size: 15px; padding: 10px 16px; border-radius: 6px 6px 0 0;\"\u003eFeatures \u0026amp; Benefits\u003c\/div\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fill,minmax(260px,1fr)); gap: 12px; background: #e6f4f3; padding: 14px; border-radius: 0 0 6px 6px; margin-bottom: 22px;\"\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ 100% Depth of Discharge\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eUnlike the ECS4300 series (90% DoD), the EQ4800 delivers \u003cstrong\u003e100% usable capacity\u003c\/strong\u003e — meaning the full 4.66 kWh per module is available to the system. This is a meaningful improvement in effective storage per module with no additional cost.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ Larger Maximum Capacity\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eThe EQ4800 supports up to \u003cstrong\u003e9 modules per stack\u003c\/strong\u003e (1 Master + 8 Slaves), enabling a total storage capacity of \u003cstrong\u003e41.93 kWh\u003c\/strong\u003e — significantly more than the ECS4300's 29.03 kWh maximum, making it suitable for larger homes and commercial applications.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ ECM4800 Drop-In Replacement\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eThe EQ4800 is \u003cstrong\u003ephysically and electrically identical to the ECM4800\u003c\/strong\u003e — same dimensions, same connectors, same performance specs — just with updated firmware. Installers familiar with the ECM4800 series will find installation identical.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ Integrated BMS\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eThe Master contains the full Battery Management System — \u003cstrong\u003ecell balancing, state-of-charge monitoring, over\/under voltage and current protection, and temperature management\u003c\/strong\u003e — managed across all connected Slave modules automatically.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ LFP Chemistry — Safe \u0026amp; Long-Lived\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eLiFePO₄ cells deliver \u003cstrong\u003e≥6,000 cycles\u003c\/strong\u003e with intrinsic thermal stability and no thermal runaway risk. At one full cycle per day, this equates to over 16 years of operation — well beyond typical solar system lifetimes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ IP65, Indoor or Outdoor\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eIP65 dust and jet-water protection supports \u003cstrong\u003egarage, plant room, or sheltered outdoor installation\u003c\/strong\u003e. Natural convection cooling — fanless and silent. Wide operating temperature range (discharge: –10°C to +55°C).\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ FoxESS Cloud Monitoring\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eFull real-time monitoring via the \u003cstrong\u003eFoxESS Cloud platform and app\u003c\/strong\u003e — state of charge, charge\/discharge history, and system alerts. Supports tariff-intelligent scheduling to charge at low-rate periods and discharge at peak rates.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 6px; padding: 13px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 5px;\"\u003e✔ 10-Year × 3 Warranty\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003eThe EQ4800 carries a \u003cstrong\u003e10×3 warranty structure\u003c\/strong\u003e — confirm full warranty terms and registration requirements in the Fox ESS Battery Warranty document. Register via the Fox ESS installer portal at commissioning.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: 600; font-size: 15px; padding: 10px 16px; border-radius: 6px 6px 0 0;\"\u003eTechnical Specifications\u003c\/div\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 22px; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; width: 42%; border-bottom: 1px solid #c8e6e3;\"\u003ePart Number (Master)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003eFE-HV-EQM-4800 \/ EQM4800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eModule Type\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e\n\u003cstrong\u003eMaster\u003c\/strong\u003e (includes BMS — 1 required per stack)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eBattery Chemistry\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003eLFP (LiFePO₄)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eNominal Energy per Module\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e\u003cstrong\u003e4.66 kWh\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eUsable Capacity (100% DoD)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e\u003cstrong\u003e4.66 kWh per module\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eDepth of Discharge\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e\u003cstrong\u003e100%\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eRound-Trip Efficiency\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e\u0026gt;95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e≥6,000 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eNormal Capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e104 Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eRecommended Charge\/Discharge Current\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e30 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eMax Charge\/Discharge Current\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e50 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003ePeak Discharge Current (60 s)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e65 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eCommunication\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003eCAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eDisplay\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e6× LED (Master)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eMax Modules per Stack\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e9 (1× Master + 8× Slave)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eMax Stack Capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e\u003cstrong\u003e41.93 kWh\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eOperating Temperature — Discharge\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e–10°C to +55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eOperating Temperature — Charge\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e0°C to +55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eInstallation Location\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003eIndoor or outdoor (stand-mounted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eIngress Protection\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003eIP65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eMax Altitude\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e3,000 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eDimensions — L2 stack (W × H × D)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003e570 × 386 × 380 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600; border-bottom: 1px solid #c8e6e3;\"\u003eCertifications\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; border-bottom: 1px solid #c8e6e3;\"\u003eIEC 62619, EN IEC 61000-6-1\/2\/3\/4, UN38.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-weight: 600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px;\"\u003e\n\u003cstrong\u003e10×3 years\u003c\/strong\u003e (see Fox ESS Battery Warranty Terms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: 600; font-size: 15px; padding: 10px 16px; border-radius: 6px 6px 0 0;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #c8e6e3; border-top: none; border-radius: 0 0 6px 6px; margin-bottom: 8px;\"\u003e\n\u003cdetails style=\"border-bottom: 1px solid #c8e6e3;\"\u003e\n\u003csummary style=\"padding: 13px 16px; cursor: pointer; font-weight: 600; background: #f0faf9;\"\u003eWhat is the difference between the EQ4800 and the ECS4300?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 11px 16px; font-size: 14px;\"\u003eThe two key differences are capacity and DoD. The \u003cstrong\u003eEQ4800 offers 4.66 kWh per module at 100% DoD\u003c\/strong\u003e — meaning the full 4.66 kWh is usable. The \u003cstrong\u003eECS4300 offers 4.14 kWh at 90% DoD\u003c\/strong\u003e — giving approximately 3.73 kWh usable per module. The EQ4800 also supports up to 9 modules per stack vs 7 for the ECS4300, giving a maximum of 41.93 kWh vs 29.03 kWh. For new installations where maximising storage capacity matters, the EQ4800 is the recommended choice.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid #c8e6e3;\"\u003e\n\u003csummary style=\"padding: 13px 16px; cursor: pointer; font-weight: 600; background: #fff;\"\u003eCan EQ4800 batteries work with an existing ECM4800 \/ EC4800 system?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 11px 16px; font-size: 14px;\"\u003eYes — the EQ4800 is the \u003cstrong\u003edirect replacement for the ECM4800 and EC4800\u003c\/strong\u003e. The EQ4800 Master (EQM4800) replaces the ECM4800 Master, and EQ4800 Slaves can be mixed with legacy EC4800 Slave modules. When mixing, the stack is \u003cstrong\u003elimited to a maximum of 7 modules total\u003c\/strong\u003e. The EQ4800 carries updated firmware but is otherwise identical in specification.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 13px 16px; cursor: pointer; font-weight: 600; background: #f0faf9;\"\u003eWhich Fox inverters are compatible?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 11px 16px; font-size: 14px;\"\u003eThe EQ4800 battery stack is compatible with Fox ESS \u003cstrong\u003eH1, KH1, and AIO hybrid inverter ranges\u003c\/strong\u003e. Always consult the Fox ESS Battery Limits Guide for the maximum total battery capacity supported by your specific inverter model and firmware version. Ensure inverter firmware is updated before commissioning.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Fox ESS","offers":[{"title":"Default Title","offer_id":64094175887709,"sku":"FE-HV-EQM-4800","price":1595.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/FoxESSECS41004.03kWhHVBattery_Master_V2.webp?v=1765258130","url":"https:\/\/qualityheating.co.uk\/products\/fox-eq4800-4-66kwh-hv-battery-master","provider":"AIZO Quality Heating","version":"1.0","type":"link"}