{"product_id":"sigenergy-sigen-power-sensor-single-phase-external-ct-120a-din-rail-rs485-solar-import-export-monitoring","title":"Sigenergy Sigen Power Sensor | Single Phase External CT 120A | DIN Rail | RS485 | Solar Import\/Export Monitoring","description":"\u003cstyle\u003e\n  .sgs-desc * { box-sizing: border-box; }\n  .sgs-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .sgs-desc p, .sgs-desc li, .sgs-desc td, .sgs-desc th { font-size: 16px !important; line-height: 1.7; }\n  .sgs-desc h2 { font-size: 22px !important; font-weight: 700; color: #0d1a2e; border-bottom: 2px solid #e8401c; padding-bottom: 6px; margin: 2rem 0 1rem; line-height: 1.3; }\n  .sgs-desc h3 { font-size: 17px !important; font-weight: 700; color: #0d1a2e; margin: 1.2rem 0 0.4rem; line-height: 1.4; }\n  .sgs-desc p { margin: 0 0 1rem; }\n  .sgs-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .sgs-desc ul li { margin-bottom: 0.5rem; }\n\n  .sgs-intro-box { background: #fdf0ed; border-left: 4px solid #e8401c; padding: 1.1rem 1.4rem; border-radius: 0 6px 6px 0; margin-bottom: 1.5rem; }\n  .sgs-intro-box p { margin: 0 !important; }\n\n  .sgs-badge { display: inline-block; background: #e8401c; color: #fff; font-size: 13px !important; font-weight: 700; border-radius: 4px; padding: 2px 10px; margin-right: 6px; margin-bottom: 4px; vertical-align: middle; }\n  .sgs-badge.dark { background: #0d1a2e; }\n  .sgs-badge.grey { background: #555; }\n  .sgs-badge.green { background: #1a7a3c; }\n\n  .sgs-stat-bar { background: #0d1a2e; color: #fff; border-radius: 8px; padding: 1.1rem 1.4rem; margin: 1.2rem 0; display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: center; justify-content: space-around; }\n  .sgs-stat { text-align: center; }\n  .sgs-stat .num { font-size: 26px !important; font-weight: 800; color: #ff7a5a; line-height: 1; }\n  .sgs-stat .lbl { font-size: 12px !important; color: #aab; margin-top: 2px; }\n\n  .sgs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 0.85rem; margin-bottom: 1.2rem; }\n  .sgs-card { background: #fdf0ed; border: 1px solid #f5c4b8; border-radius: 6px; padding: 1rem 1.1rem; line-height: 1.6; }\n  .sgs-card strong { display: block; color: #0d1a2e; margin-bottom: 0.35rem; font-size: 16px !important; }\n\n  .sgs-enables-list { list-style: none !important; padding: 0 !important; margin: 0 0 1rem !important; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0.5rem; }\n  .sgs-enables-list li { background: #fdf0ed; border: 1px solid #f5c4b8; border-radius: 5px; padding: 0.55rem 1rem 0.55rem 2.2rem !important; position: relative; font-size: 15px !important; margin: 0 !important; line-height: 1.55; }\n  .sgs-enables-list li::before { content: \"✓\"; position: absolute; left: 0.7rem; color: #e8401c; font-weight: 700; }\n\n  .sgs-variant-table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; }\n  .sgs-variant-table th { background: #0d1a2e; color: #fff !important; padding: 0.65rem 0.9rem; font-size: 14px !important; text-align: left; }\n  .sgs-variant-table th:not(:first-child) { text-align: center; }\n  .sgs-variant-table td { padding: 0.55rem 0.9rem; border-bottom: 1px solid #e8e0de; font-size: 14px !important; }\n  .sgs-variant-table td:not(:first-child) { text-align: center; }\n  .sgs-variant-table tr:nth-child(even) td { background: #fdf0ed; }\n  .sgs-variant-table td:first-child { font-weight: 600; color: #111; }\n  .sgs-variant-table .col-highlight td { background: #fdf0ed; font-weight: 700; color: #e8401c !important; }\n  .sgs-variant-table .col-highlight td:first-child { color: #e8401c !important; }\n\n  .sgs-callout { background: #fff8e6; border: 1px solid #f0d080; border-radius: 6px; padding: 1rem 1.3rem; margin: 1.2rem 0; color: #5a4a00; }\n  .sgs-callout p { margin: 0 !important; }\n\n  .sgs-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }\n  .sgs-spec-table th { background: #0d1a2e; color: #fff !important; text-align: left; padding: 0.7rem 1rem; font-weight: 700; font-size: 16px !important; }\n  .sgs-spec-table td { padding: 0.6rem 1rem; border-bottom: 1px solid #e8e0de; vertical-align: top; font-size: 16px !important; }\n  .sgs-spec-table tr:nth-child(even) td { background: #fdf0ed; }\n  .sgs-spec-table td:first-child { font-weight: 600; color: #111; width: 44%; }\n  .sgs-spec-table .section-head td { background: #e8401c !important; color: #fff !important; font-weight: 700 !important; font-size: 14px !important; text-transform: uppercase; letter-spacing: 0.05em; }\n\n  .sgs-faq-item { border-bottom: 1px solid #e8e0de; padding: 1rem 0; }\n  .sgs-faq-item:last-child { border-bottom: none; }\n  .sgs-faq-item p { margin: 0.4rem 0 0 !important; }\n\n  .sgs-infobox { background: #fdf0ed; border: 1px solid #f5c4b8; border-radius: 6px; padding: 1rem 1.2rem; margin-top: 1.5rem; font-size: 16px !important; line-height: 1.6; }\n\n  @media (max-width: 600px) {\n    .sgs-grid { grid-template-columns: 1fr 1fr; }\n    .sgs-stat-bar { justify-content: center; }\n    .sgs-enables-list { grid-template-columns: 1fr; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"sgs-desc\"\u003e\n\n  \u003cdiv class=\"sgs-intro-box\"\u003e\n    \u003cp\u003e\n      \u003cspan class=\"sgs-badge\"\u003eSingle Phase\u003c\/span\u003e\n      \u003cspan class=\"sgs-badge dark\"\u003e1 × 120A CT Included\u003c\/span\u003e\n      \u003cspan class=\"sgs-badge green\"\u003e±1% Accuracy\u003c\/span\u003e\n      \u003cspan class=\"sgs-badge grey\"\u003ePart No: SIG-SENSOR-SP-CT-DH\u003c\/span\u003e\n    \u003c\/p\u003e\n    \u003cp style=\"margin-top:0.75rem !important;\"\u003eThe \u003cstrong\u003eSigenergy Power Sensor SP-CT-DH\u003c\/strong\u003e is a single-phase energy metering device that connects via RS485 to any compatible Sigenergy inverter or energy controller, giving the SigenStor EMS real-time, high-accuracy visibility of grid import and export. This external CT variant uses a \u003cstrong\u003esplit-core current transformer\u003c\/strong\u003e that clips around the existing main live conductor — no disconnection of live wiring required during installation. One 120A split-core CT with a 1m cable is included in the box. It is the recommended single-phase metering solution for installs where the main incoming cable cannot be routed through the sensor body, or where the incomer is too large for a direct-connection sensor.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"sgs-stat-bar\"\u003e\n    \u003cdiv class=\"sgs-stat\"\u003e\n\u003cdiv class=\"num\"\u003e1-Phase\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003e1P2W\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"sgs-stat\"\u003e\n\u003cdiv class=\"num\"\u003e120A\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eCT Rating\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"sgs-stat\"\u003e\n\u003cdiv class=\"num\"\u003e±1%\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003ePower Accuracy\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"sgs-stat\"\u003e\n\u003cdiv class=\"num\"\u003e100ms\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eData Refresh\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"sgs-stat\"\u003e\n\u003cdiv class=\"num\"\u003eRS485\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eInterface\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"sgs-stat\"\u003e\n\u003cdiv class=\"num\"\u003eIP51\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eProtection Rating\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhat the Power Sensor Enables\u003c\/h2\u003e\n  \u003cp\u003ePositioned at the grid connection point, the Power Sensor feeds live import\/export data to the Energy Controller every 100ms via RS485 Modbus RTU. This measurement underpins the full range of SigenStor intelligent energy management features:\u003c\/p\u003e\n  \u003cul class=\"sgs-enables-list\"\u003e\n    \u003cli\u003eDynamic load management — throttles inverter output in real time to prevent main fuse overload\u003c\/li\u003e\n    \u003cli\u003eSolar surplus EV charging (Solar Boost, 100% PV, PV Storage \u0026amp; Charging modes) on the Sigen EV AC Charger\u003c\/li\u003e\n    \u003cli\u003eExport limitation — caps grid export for DNO \/ G98 compliance\u003c\/li\u003e\n    \u003cli\u003eImport limitation — prevents grid draw exceeding a set threshold\u003c\/li\u003e\n    \u003cli\u003eSelf-consumption optimisation — battery charges\/discharges to minimise import\u003c\/li\u003e\n    \u003cli\u003eAI tariff scheduling — real consumption data feeds the mySigen AI energy optimiser\u003c\/li\u003e\n    \u003cli\u003eAccurate mySigen app energy flow display — grid, solar, battery and household load\u003c\/li\u003e\n    \u003cli\u003eAnti-backflow protection when used with the Sigen Energy Gateway\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv class=\"sgs-callout\"\u003e\n    \u003cp\u003e⚠️ \u003cstrong\u003eRequired for key functions:\u003c\/strong\u003e Dynamic load management and all solar-priority EV charging modes on the Sigen EV AC Charger \u003cstrong\u003erequire a Power Sensor\u003c\/strong\u003e. Without it, the SigenStor system has no visibility of household consumption and cannot prevent overload or optimise EV charging against solar surplus.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eKey Features\u003c\/h2\u003e\n  \u003cdiv class=\"sgs-grid\"\u003e\n    \u003cdiv class=\"sgs-card\"\u003e\n\u003cstrong\u003e🔌 External Split-Core CT — No Live Disconnection\u003c\/strong\u003eThe included 120A split-core CT clips around the existing live conductor without any need to cut, disconnect or strip wiring. The split-core design opens on a hinge and snaps closed around the cable — making installation faster, safer, and suitable as a retrofit to systems already in service. CT bore diameter: 16mm; cable length: 1m.\u003c\/div\u003e\n    \u003cdiv class=\"sgs-card\"\u003e\n\u003cstrong\u003e⚡ 100ms Data Refresh\u003c\/strong\u003eMeasurements update every 100 milliseconds over RS485 (Modbus RTU, 9600 baud). This rapid rate ensures the Energy Controller can react to sudden load changes fast enough to prevent overload trips or unnecessary grid draw in real time.\u003c\/div\u003e\n    \u003cdiv class=\"sgs-card\"\u003e\n\u003cstrong\u003e🎯 ±1% Power Accuracy\u003c\/strong\u003eVoltage accuracy ±0.5%, current accuracy ±0.5%, power accuracy ±1%, frequency accuracy ±0.2%. Sufficient for export metering, demand management, and Smart Export Guarantee (SEG) export tracking.\u003c\/div\u003e\n    \u003cdiv class=\"sgs-card\"\u003e\n\u003cstrong\u003e📺 LCD Real-Time Display\u003c\/strong\u003eIntegrated LCD shows live voltage, current, power and frequency — useful for commissioning and fault-finding without requiring the mySigen app. Installers get an instant at-a-glance view of grid conditions at the metering point.\u003c\/div\u003e\n    \u003cdiv class=\"sgs-card\"\u003e\n\u003cstrong\u003e🔗 Plug-and-Play with Sigenergy Devices\u003c\/strong\u003eRS485 connection to the Energy Controller requires no configuration or pairing beyond standard Sigenergy commissioning. Compatible with all Sigen Energy Controller, Hybrid Inverter, Storage Controller and Energy Gateway products.\u003c\/div\u003e\n    \u003cdiv class=\"sgs-card\"\u003e\n\u003cstrong\u003e📐 DIN Rail Mounting\u003c\/strong\u003e35mm DIN rail mounting for direct installation in a domestic consumer unit or distribution board. Compact sensor body: 18 × 118 × 64mm \/ 70g — one of the most space-efficient units in the Sigen Sensor range.\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eSingle Phase Sensor Variants — Which to Choose\u003c\/h2\u003e\n  \u003ctable class=\"sgs-variant-table\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003ePart No\u003c\/th\u003e\n        \u003cth\u003eType\u003c\/th\u003e\n        \u003cth\u003eMax Current\u003c\/th\u003e\n        \u003cth\u003eCT Included\u003c\/th\u003e\n        \u003cth\u003eBest For\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSIG-SENSOR-SP-DH\u003c\/td\u003e\n        \u003ctd\u003eDirect connection\u003c\/td\u003e\n        \u003ctd\u003e100A\u003c\/td\u003e\n        \u003ctd\u003eBuilt-in (internal)\u003c\/td\u003e\n        \u003ctd\u003eInstalls where incomer cable routes through sensor body; tidy single-unit solution\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr class=\"col-highlight\"\u003e\n        \u003ctd\u003eSIG-SENSOR-SP-CT-DH ★ (this product)\u003c\/td\u003e\n        \u003ctd\u003eExternal CT\u003c\/td\u003e\n        \u003ctd\u003e120A (CT rated)\u003c\/td\u003e\n        \u003ctd\u003e1 × 120A split-core CT\u003c\/td\u003e\n        \u003ctd\u003eRetrofits, large cable sizes, or where cable cannot pass through sensor; clip-on installation\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003ctable class=\"sgs-spec-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr class=\"section-head\"\u003e\u003ctd colspan=\"2\"\u003eProduct Identity\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePart No\u003c\/td\u003e\n\u003ctd\u003eSIG-SENSOR-SP-CT-DH\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDatasheet model designation\u003c\/td\u003e\n\u003ctd\u003eSP-CT120-DH\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSigenergy\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"section-head\"\u003e\u003ctd colspan=\"2\"\u003ePower Supply \u0026amp; Grid Connection\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGrid connection type\u003c\/td\u003e\n\u003ctd\u003e1P2W (single-phase two-wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAC input voltage range\u003c\/td\u003e\n\u003ctd\u003e176–276 Vac\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNominal AC frequency\u003c\/td\u003e\n\u003ctd\u003e50 \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"section-head\"\u003e\u003ctd colspan=\"2\"\u003eMeasurement Accuracy\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eVoltage accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCurrent accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePower accuracy\u003c\/td\u003e\n\u003ctd\u003e±1%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFrequency accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.2%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eData refresh rate\u003c\/td\u003e\n\u003ctd\u003e100ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"section-head\"\u003e\u003ctd colspan=\"2\"\u003eCommunication\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eRS485\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBaud rate\u003c\/td\u003e\n\u003ctd\u003e9,600 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003eModbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"section-head\"\u003e\u003ctd colspan=\"2\"\u003eGeneral Data — Sensor Body\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDimensions (W × H × D)\u003c\/td\u003e\n\u003ctd\u003e18 × 118 × 64mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e70g\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eLCD (real-time voltage, current, power, frequency)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInstallation method\u003c\/td\u003e\n\u003ctd\u003eDIN Rail 35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eIngress protection rating\u003c\/td\u003e\n\u003ctd\u003eIP51\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-30°C to 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eStorage temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to 85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRelative humidity\u003c\/td\u003e\n\u003ctd\u003e0–90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"section-head\"\u003e\u003ctd colspan=\"2\"\u003eCT Accessory (× 1 supplied)\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNumber of CTs supplied\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCT type\u003c\/td\u003e\n\u003ctd\u003eSplit-core (clip-on, no disconnection required)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMax. operating current\u003c\/td\u003e\n\u003ctd\u003e120A\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCT inner bore diameter\u003c\/td\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCT cable length\u003c\/td\u003e\n\u003ctd\u003e1 metre\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight per CT\u003c\/td\u003e\n\u003ctd\u003e90g\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"section-head\"\u003e\u003ctd colspan=\"2\"\u003eStandards\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eStandard compliance\u003c\/td\u003e\n\u003ctd\u003eEN 61010-1:2010, EN 61010-2-030:2010\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdiv class=\"sgs-faq-item\"\u003e\n    \u003ch3\u003eShould I choose this (SP-CT-DH) or the direct-connection sensor (SP-DH)?\u003c\/h3\u003e\n    \u003cp\u003eIf the main incoming live cable can physically pass through the sensor body, the direct-connection \u003cstrong\u003eSP-DH\u003c\/strong\u003e gives a slightly tidier, single-component installation with no separate CT to manage. The \u003cstrong\u003eSP-CT-DH\u003c\/strong\u003e (this product) is the better choice when the cable cannot be rerouted, when it is larger than the sensor body's aperture will accept, or when you are retrofitting to an existing installation and want to avoid any disconnection of live wiring. Both variants deliver identical measurement performance.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"sgs-faq-item\"\u003e\n    \u003ch3\u003eIs the 120A CT suitable for my installation?\u003c\/h3\u003e\n    \u003cp\u003eMost UK single-phase residential supplies are rated at 60A, 80A or 100A at the DNO cutout fuse. The 120A CT in this product comfortably covers all of these. If you have an unusually large single-phase supply exceeding 120A, contact Sigenergy or your distributor — a higher-rated CT may be available as an accessory. For three-phase installations, see the TP variant range.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"sgs-faq-item\"\u003e\n    \u003ch3\u003eWhere exactly does the CT get installed?\u003c\/h3\u003e\n    \u003cp\u003eThe CT clips around the incoming main live conductor at the grid side of the installation — typically on the service tails between the DNO cutout fuse and the main switch in the consumer unit. It must be positioned to measure total grid import and export, on the grid side of the inverter connection point. The 1m CT cable runs back to the sensor body, which mounts on the DIN rail in the consumer unit.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"sgs-infobox\"\u003e\n    \u003cstrong\u003eℹ️ Often purchased with:\u003c\/strong\u003e\n    \u003cstrong\u003eSigenStor EC 3.6 SP or EC 6.0 SP\u003c\/strong\u003e — single-phase Energy Controllers this sensor monitors ·\n    \u003cstrong\u003eSigen EV AC Charger 7kW\u003c\/strong\u003e — Power Sensor required for solar charging modes ·\n    \u003cstrong\u003eSigen Gateway HomePro SP-F\u003c\/strong\u003e — works with Power Sensor for anti-backflow and load monitoring ·\n    \u003cstrong\u003eSIG-SENSOR-SP-DH\u003c\/strong\u003e — direct-connection alternative if cable routing permits\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Sigenergy","offers":[{"title":"Default Title","offer_id":63581200056669,"sku":"SIG-SENSOR-SP-CT-DH","price":110.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/eastron-SDM230-modbus.jpg?v=1763485387","url":"https:\/\/qualityheating.co.uk\/products\/sigenergy-sigen-power-sensor-single-phase-external-ct-120a-din-rail-rs485-solar-import-export-monitoring","provider":"AIZO Quality Heating","version":"1.0","type":"link"}