{"product_id":"atmoce-mr100-s-single-phase-safety-relay-secure-grid-disconnection-for-solar-backup-systems","title":"Atmoce MR100‑S Single Phase Safety Relay – Secure Grid Disconnection for Solar \u0026 Backup Systems","description":"\u003cp\u003eThe Atmoce MR100‑S is a DIN rail mount M Relay designed for single phase installations, providing a reliable and compliant grid isolation solution for solar photovoltaic and battery backup systems. Engineered for both domestic and commercial use, it offers automatic or remote controlled disconnection between the PV or storage system and the grid, enhancing safety, optimising export control, and supporting local regulation.\u003c\/p\u003e\n\u003ch3\u003eWhy buy the Atmoce MR100‑S?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced electrical safety:\u003c\/strong\u003e Acts as a robust physical disconnect, ensuring safe isolation of the grid from your PV or storage installation during maintenance, faults, or emergency shutdowns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart energy management:\u003c\/strong\u003e Integrates seamlessly with Atmoce M‑Gateway and compatible controllers, enabling automatic grid tie on\/off cycles based on tariffs, battery state of charge, or local grid code requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable single phase performance:\u003c\/strong\u003e Rated up to 40 A at 230 V, the MR100‑S is well matched to typical residential and light commercial single phase systems, reducing the risk of overload and supporting long term operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple, DIN rail installation:\u003c\/strong\u003e Compact design with standard DIN rail mounting suits modern distribution boards and combiners, speeding up installation for both electricians and solar installers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow \u003c\/strong\u003e\u003cstrong\u003epower, low noise operation:\u003c\/strong\u003e Features minimal night time power consumption and low acoustic noise, making it suitable for domestic environments where noise and vampire draw are a concern.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle phase residential solar PV systems.\u003c\/li\u003e\n\u003cli\u003eSingle phase battery backup and hybrid installations.\u003c\/li\u003e\n\u003cli\u003eConnection boxes or combiners where grid disconnection is required for safety or regulatory compliance.\u003c\/li\u003e\n\u003cli\u003eProjects needing remote or time of use control of grid‑tie status (e.g. night time is landing or feed in limit scenarios).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle‑phase 230 V, 40 A grid‑protection relay for L-N operation.\u003c\/li\u003e\n\u003cli\u003eAuto disconnect and re engage function, supporting safe grid separation and automatic re connection.\u003c\/li\u003e\n\u003cli\u003eRS485 interface for integration with monitoring and control gateways.\u003c\/li\u003e\n\u003cli\u003eDIN rail mounting (35 x 7.5 mm punched rail) for easy installation in distribution boards and combiners.\u003c\/li\u003e\n\u003cli\u003eLED status indicator for clear visual feedback of relay state.\u003c\/li\u003e\n\u003cli\u003eIP20 protection rating for indoor use in dry, dust free environments.\u003c\/li\u003e\n\u003cli\u003eLow night power consumption and low operating noise for homes and offices.\u003c\/li\u003e\n\u003cli\u003eDesigned to meet relevant low voltage and electromagnetic compatibility standards for grid connected equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #ccc; padding: 8px; text-align: left;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ccc; padding: 8px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eAtmoce MR100‑S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eGrid type\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eSingle phase 230 V, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eNominal voltage\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003e230 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eOperating voltage range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003e184-276 V (L-N)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eMaximum current (continuous)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003e40 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eNight‑power consumption\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eApprox. 0.3-0.4 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eOperating temperature range\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003e–30 °C to +50 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eCable connection (PV \u0026amp; grid)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003e2.5-6.0 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003e35 x 7.5 mm punched DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eDimensions (W × H × D approx.)\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003e85 × 148 × 40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eProtection rating\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eCommunication interface\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eRS485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eTypical application\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ccc; padding: 8px;\"\u003eSingle phase PV and backup systems, grid isolation relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- MPN and EAN are not explicitly listed on the midsummer product page or in the public PDFs used here; omitting to avoid incorrect data --\u003e","brand":"Atmoce","offers":[{"title":"Default Title","offer_id":64746075160925,"sku":"AT-MR100-S","price":49.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/atmoce-mr100-s-relay.jpg?v=1779274361","url":"https:\/\/qualityheating.co.uk\/products\/atmoce-mr100-s-single-phase-safety-relay-secure-grid-disconnection-for-solar-backup-systems","provider":"AIZO Quality Heating","version":"1.0","type":"link"}