{"product_id":"fox-ess-eps-3ph-4unit-3-phase-backup-box-fe-3ph-4unit","title":"Fox ESS EPS 3PH-4UNIT 3-Phase Backup Box | FE-3PH-4UNIT","description":"\u003c!-- SEO Product Name: Fox ESS EPS 3PH-4UNIT 3-Phase Backup Box | FE-3PH-4UNIT | IP65 --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; font-family:inherit; color:#222; line-height:1.6;\"\u003e\n\n\u003cp style=\"margin:0 0 14px 0;\"\u003eThe \u003cstrong\u003eFox ESS EPS 3PH-4UNIT\u003c\/strong\u003e is a \u003cstrong\u003ethree-phase parallel and backup box\u003c\/strong\u003e built for \u003cstrong\u003eresidential and commercial solar installations\u003c\/strong\u003e. It connects the \u003cstrong\u003eEPS (off-grid) outputs of up to four Fox ESS three-phase inverters\u003c\/strong\u003e to a single load output, so several units can share one backed-up supply, and it \u003cstrong\u003eswitches automatically between on-grid and off-grid operation\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px 0;\"\u003eRated for \u003cstrong\u003e80A per phase\u003c\/strong\u003e on both the \u003cstrong\u003egrid input\u003c\/strong\u003e and the \u003cstrong\u003eload output\u003c\/strong\u003e, it carries \u003cstrong\u003efour dedicated EPS inputs\u003c\/strong\u003e at \u003cstrong\u003e20A per phase each\u003c\/strong\u003e, plus a \u003cstrong\u003eCOM port\u003c\/strong\u003e for the inverter link. The \u003cstrong\u003eIP65-rated robust metal enclosure\u003c\/strong\u003e is \u003cstrong\u003ewall-mounted\u003c\/strong\u003e, \u003cstrong\u003enaturally cooled\u003c\/strong\u003e and supplied with brackets and fixings for \u003cstrong\u003estraightforward installation\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:12px; margin:22px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; border:2px solid #008377CF; border-radius:10px; padding:14px 8px; text-align:center; background:#fff;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:800; color:#008377CF; line-height:1.2;\"\u003e80A\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444; margin-top:4px;\"\u003eMax per phase (grid input \/ load output)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; border:2px solid #008377CF; border-radius:10px; padding:14px 8px; text-align:center; background:#fff;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:800; color:#008377CF; line-height:1.2;\"\u003e4\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444; margin-top:4px;\"\u003eInverters in parallel (EPS-1 to EPS-4)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; border:2px solid #008377CF; border-radius:10px; padding:14px 8px; text-align:center; background:#fff;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:800; color:#008377CF; line-height:1.2;\"\u003e20A\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444; margin-top:4px;\"\u003eMax per phase, each EPS input\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; border:2px solid #008377CF; border-radius:10px; padding:14px 8px; text-align:center; background:#fff;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:800; color:#008377CF; line-height:1.2;\"\u003eIP65\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444; margin-top:4px;\"\u003eRobust metal enclosure\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; border:2px solid #008377CF; border-radius:10px; padding:14px 8px; text-align:center; background:#fff;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:800; color:#008377CF; line-height:1.2;\"\u003e-25 to +50 °C\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444; margin-top:4px;\"\u003eOperating temperature\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 130px; min-width:130px; border:2px solid #008377CF; border-radius:10px; padding:14px 8px; text-align:center; background:#fff;\"\u003e\n\u003cdiv style=\"font-size:22px; font-weight:800; color:#008377CF; line-height:1.2;\"\u003e336 x 306 x 138 mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px; color:#444; margin-top:4px;\"\u003eDimensions (W x H x D)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"border-left:5px solid #008377CF; background:#E6F3F1; padding:14px 18px; margin:16px 0; border-radius:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:4px;\"\u003eHow it works\u003c\/div\u003e\n\u003cdiv style=\"color:#222; line-height:1.55;\"\u003eEach inverter's \u003cstrong\u003eEPS (off-grid) output\u003c\/strong\u003e connects to its own port (\u003cstrong\u003eEPS-1 to EPS-4\u003c\/strong\u003e), the \u003cstrong\u003emains supply\u003c\/strong\u003e connects to \u003cstrong\u003eGRID\u003c\/strong\u003e, the protected circuits connect to \u003cstrong\u003eLOAD\u003c\/strong\u003e, and the \u003cstrong\u003ehost inverter's communication link\u003c\/strong\u003e connects to \u003cstrong\u003eCOM\u003c\/strong\u003e. With everything connected, the box handles the \u003cstrong\u003eautomatic parallel and off-grid switching\u003c\/strong\u003e between the machines.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:5px solid #B26A00; background:#FFF4E0; padding:14px 18px; margin:16px 0; border-radius:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#B26A00; margin-bottom:4px;\"\u003eCompatibility: check your inverter before ordering\u003c\/div\u003e\n\u003cdiv style=\"color:#222; line-height:1.55;\"\u003eDesigned for \u003cstrong\u003eFox ESS three-phase H3 and AIO-H3\u003c\/strong\u003e inverters only. It is \u003cstrong\u003enot compatible with the H3 Smart or H3 Pro\u003c\/strong\u003e and is \u003cstrong\u003enot intended for single-phase systems\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:5px solid #C62828; background:#FDECEA; padding:14px 18px; margin:16px 0; border-radius:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#C62828; margin-bottom:4px;\"\u003eQualified electrician required\u003c\/div\u003e\n\u003cdiv style=\"color:#222; line-height:1.55;\"\u003eOnly \u003cstrong\u003eauthorised, qualified personnel\u003c\/strong\u003e may wire this unit. \u003cstrong\u003eDisconnect the circuit-breaker on all phases and secure it against re-connection\u003c\/strong\u003e before working, check the grid voltage against the permitted range, and follow the manufacturer's manual and current UK wiring regulations (BS 7671).\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#008377CF; border-bottom:3px solid #008377CF; padding-bottom:6px; margin:30px 0 12px 0; font-size:20px;\"\u003eKey Features\u003c\/h3\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; gap:14px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #d6e6e4; border-top:4px solid #008377CF; border-radius:8px; padding:16px; background:#fff;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px; font-size:17px;\"\u003eParallel up to 4 inverters\u003c\/div\u003e\n\u003cdiv style=\"color:#333; line-height:1.55; font-size:15px;\"\u003eEnables \u003cstrong\u003eoff-grid parallel operation of up to four three-phase H3 \/ AIO-H3 units\u003c\/strong\u003e from one box, with a single grid connection and a single load output.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #d6e6e4; border-top:4px solid #008377CF; border-radius:8px; padding:16px; background:#fff;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px; font-size:17px;\"\u003eAutomatic switching\u003c\/div\u003e\n\u003cdiv style=\"color:#333; line-height:1.55; font-size:15px;\"\u003e\n\u003cstrong\u003eAutomatically switches between on-grid and off-grid state\u003c\/strong\u003e, handling the changeover between mains and inverter EPS supply without manual intervention.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #d6e6e4; border-top:4px solid #008377CF; border-radius:8px; padding:16px; background:#fff;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px; font-size:17px;\"\u003e80A per phase\u003c\/div\u003e\n\u003cdiv style=\"color:#333; line-height:1.55; font-size:15px;\"\u003e\n\u003cstrong\u003e80A maximum per phase\u003c\/strong\u003e on the grid input and on the load output, suited to \u003cstrong\u003ethree-phase residential and commercial loads\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #d6e6e4; border-top:4px solid #008377CF; border-radius:8px; padding:16px; background:#fff;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px; font-size:17px;\"\u003eFour EPS inputs\u003c\/div\u003e\n\u003cdiv style=\"color:#333; line-height:1.55; font-size:15px;\"\u003e\n\u003cstrong\u003eFour groups of EPS inputs (EPS-1 to EPS-4)\u003c\/strong\u003e, each rated \u003cstrong\u003e20A per phase\u003c\/strong\u003e at 220\/380 or 230\/400 VAC, 3L\/N\/PE, 50\/60 Hz.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #d6e6e4; border-top:4px solid #008377CF; border-radius:8px; padding:16px; background:#fff;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px; font-size:17px;\"\u003eIP65 metal enclosure\u003c\/div\u003e\n\u003cdiv style=\"color:#333; line-height:1.55; font-size:15px;\"\u003eA \u003cstrong\u003erobust metal enclosure with IP65 ingress protection\u003c\/strong\u003e gives dust-tight, water-jet protection, with an operating range of \u003cstrong\u003e-25 to +50 °C\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; min-width:240px; border:1px solid #d6e6e4; border-top:4px solid #008377CF; border-radius:8px; padding:16px; background:#fff;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px; font-size:17px;\"\u003eEasy wall mounting\u003c\/div\u003e\n\u003cdiv style=\"color:#333; line-height:1.55; font-size:15px;\"\u003e\n\u003cstrong\u003eWall-mounted with natural cooling\u003c\/strong\u003e (no fan). \u003cstrong\u003eFour mounting brackets, expansion tubes and screws, an earth terminal and the connector plugs\u003c\/strong\u003e are included.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#008377CF; border-bottom:3px solid #008377CF; padding-bottom:6px; margin:30px 0 12px 0; font-size:20px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"margin:18px 0 0 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px;\"\u003eGeneral\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eFox ESS\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eModel\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eEPS 3PH-4UNIT\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eSKU\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eFE-3PH-4UNIT\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eType\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eThree-phase EPS parallel \/ backup box\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eCompatible inverters\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eFox ESS H3 and AIO-H3 (three-phase)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMax. inverters in parallel\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e4\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eCommunication (COM)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eMeter \/ RS-485 interface\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:18px 0 0 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px;\"\u003eGrid Input\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eRated voltage\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e220\/380 VAC, 230\/400 VAC, 3L\/N\/PE\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eRated frequency\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e50\/60 Hz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMax. input current (per phase)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e80A\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:18px 0 0 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px;\"\u003eEPS Input (from inverters)\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eRated voltage\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e220\/380 VAC, 230\/400 VAC, 3L\/N\/PE\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eRated frequency\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e50\/60 Hz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMax. input current (per phase)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e20A per input\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eNumber of groups\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e4 (EPS-1, EPS-2, EPS-3, EPS-4)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:18px 0 0 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px;\"\u003eEPS Load Output\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eRated voltage\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e220\/380 VAC, 230\/400 VAC, 3L\/N\/PE\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eRated frequency\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e50\/60 Hz\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMax. output current (per phase)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e80A\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:18px 0 0 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px;\"\u003eMechanical and Environmental\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eIngress protection\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eIP65\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eEnclosure\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eRobust metal\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eCooling concept\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eNatural\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eWall-mounted\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eOperating temperature range\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e-25 to +50 °C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eDimensions (W x H x D)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e336 x 306 x 138 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003ePacking dimensions (W x H x D)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e440 x 345 x 205 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eNet weight\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e6 kg\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eGross weight\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e7 kg\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:18px 0 0 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px;\"\u003eInstallation Requirements\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMinimum clearance: left \/ right \/ top\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e300 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMinimum clearance: bottom\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e500 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMounting surface\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eSolid brick or concrete, or equivalent strength\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eFixing holes\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e8 mm diameter, at least 50 mm deep\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eMaximum altitude\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eApprox. 2000 m above sea level\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eSite conditions\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eOut of direct sunlight, rain and snow; not in potentially explosive areas or humidity above 95%\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:18px 0 0 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#fff; font-weight:700; padding:10px 16px;\"\u003eSupplied in the Box\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eUnit\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e1 x EPS 3PH-4UNIT\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eBrackets\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e4 x mounting brackets\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eConnectors\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e1 x LOAD, 1 x GRID, 1 x COM, 4 x EPS\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eFixings\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eExpansion tubes and screws, 9 x hexagonal screws\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#ffffff; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eEarthing\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003e1 x earth terminal\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; background:#EAF4F2; padding:9px 16px; border-top:1px solid #d6e6e4;\"\u003e\n\u003cdiv style=\"flex:1 1 220px; font-weight:600; color:#222;\"\u003eDocumentation\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; color:#333;\"\u003eProduct manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:5px solid #B26A00; background:#FFF4E0; padding:14px 18px; margin:16px 0; border-radius:6px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#B26A00; margin-bottom:4px;\"\u003eDimensions and weight: source note\u003c\/div\u003e\n\u003cdiv style=\"color:#222; line-height:1.55;\"\u003eDimensions and weights above follow the \u003cstrong\u003ecurrent manufacturer datasheet (V1.4, March 2025)\u003c\/strong\u003e. The earlier user manual (V1.1) lists \u003cstrong\u003e402 x 306 x 138 mm and 2.8 kg net\u003c\/strong\u003e. Confirm the wall space and the delivered unit against the datasheet before installation.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color:#008377CF; border-bottom:3px solid #008377CF; padding-bottom:6px; margin:30px 0 12px 0; font-size:20px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails style=\"margin:10px 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; font-weight:700; padding:12px 16px; cursor:pointer;\"\u003eWhich Fox ESS inverters does the EPS 3PH-4UNIT work with?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; color:#222; line-height:1.6; background:#fff;\"\u003eIt is an accessory for the \u003cstrong\u003ethree-phase H3 and AIO-H3\u003c\/strong\u003e inverters. It is \u003cstrong\u003enot compatible with the H3 Smart or H3 Pro\u003c\/strong\u003e, and it is \u003cstrong\u003enot for single-phase systems\u003c\/strong\u003e.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:10px 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; font-weight:700; padding:12px 16px; cursor:pointer;\"\u003eHow many inverters can I connect?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; color:#222; line-height:1.6; background:#fff;\"\u003e\n\u003cstrong\u003eUp to four\u003c\/strong\u003e three-phase inverters, one per EPS port (\u003cstrong\u003eEPS-1 to EPS-4\u003c\/strong\u003e). Each EPS input is rated at \u003cstrong\u003e20A per phase\u003c\/strong\u003e. The units are first linked for communication, then each inverter's off-grid output goes to its EPS port.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:10px 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; font-weight:700; padding:12px 16px; cursor:pointer;\"\u003eWhat does the COM port connect to?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; color:#222; line-height:1.6; background:#fff;\"\u003eThe \u003cstrong\u003eCOM port\u003c\/strong\u003e takes the \u003cstrong\u003eMeter \/ RS-485 connection\u003c\/strong\u003e from the host inverter, including the relay-control, +12V and ground signals taken from the \u003cstrong\u003emeter port of the H3\u003c\/strong\u003e. Follow the pin definitions in the manual when wiring.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:10px 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; font-weight:700; padding:12px 16px; cursor:pointer;\"\u003eCan it be installed outdoors?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; color:#222; line-height:1.6; background:#fff;\"\u003eThe \u003cstrong\u003eIP65 metal enclosure\u003c\/strong\u003e and \u003cstrong\u003e-25 to +50 °C\u003c\/strong\u003e operating range suit demanding locations, but the manufacturer still specifies a site \u003cstrong\u003eout of direct sunlight, rain and snow\u003c\/strong\u003e, with good ventilation and humidity below 95%.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:10px 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; font-weight:700; padding:12px 16px; cursor:pointer;\"\u003eWhat space and wall strength do I need?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; color:#222; line-height:1.6; background:#fff;\"\u003eLeave at least \u003cstrong\u003e300 mm to the left, right and above\u003c\/strong\u003e and \u003cstrong\u003e500 mm below\u003c\/strong\u003e. Mount on \u003cstrong\u003esolid brick, concrete or an equivalent surface\u003c\/strong\u003e using the supplied brackets and expansion fixings (\u003cstrong\u003e8 mm holes, at least 50 mm deep\u003c\/strong\u003e). Weaker walls must be supported or strengthened.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin:10px 0; border:1px solid #008377CF; border-radius:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF; color:#fff; font-weight:700; padding:12px 16px; cursor:pointer;\"\u003eWho should install it?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 16px; color:#222; line-height:1.6; background:#fff;\"\u003eA \u003cstrong\u003equalified electrician\u003c\/strong\u003e. Only authorised personnel should make the connections, all phases must be \u003cstrong\u003eisolated and secured against re-connection\u003c\/strong\u003e before wiring, and the installation must follow the manufacturer's manual and UK wiring regulations (\u003cstrong\u003eBS 7671\u003c\/strong\u003e).\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e","brand":"Fox ESS","offers":[{"title":"Default Title","offer_id":65784794677597,"sku":"FE-3PH-4UNIT","price":195.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/FoxESSEPS3phBackupBox.jpg?v=1788348445","url":"https:\/\/qualityheating.co.uk\/products\/fox-ess-eps-3ph-4unit-3-phase-backup-box-fe-3ph-4unit","provider":"AIZO Quality Heating","version":"1.0","type":"link"}