{"product_id":"mersen-250a-dc-disconnector-fuses","title":"Battery Fuses \u0026 DC Disconnector 250A | Mersen NH00 Protection","description":"\u003cp\u003eThis Mersen fuse and disconnector set gives overcurrent protection and isolation between the battery bank and inverter in off-grid and hybrid solar systems. The NH00 gL\/gG fuses handle high continuous DC currents and suit lithium and lead-acid batteries in systems from 8kW upwards. The 250A disconnector allows the battery bank to be isolated safely during maintenance or in an emergency.\u003c\/p\u003e\u003ch2\u003eKey features for high current dc switch protection\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuses\u003c\/strong\u003e, 2x Mersen NH00 gL\/gG DC fuses (200A or 250A, one for positive and one for negative battery pole)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnector\u003c\/strong\u003e, 1x 250A DC disconnector (isolator)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure\u003c\/strong\u003e, fuse enclosure included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery compatibility\u003c\/strong\u003e, suitable for lithium-ion and lead-acid battery banks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication range\u003c\/strong\u003e, suitable for inverters rated 8kW, 10kW, 11kW and above\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct overview\u003c\/h2\u003e\u003cp\u003eThe cable between battery bank and inverter carries the highest continuous current in an off-grid or hybrid solar system. Correctly rated fuses on both positive and negative conductors protect the battery bank and cabling against short-circuit and overcurrent faults. The DC disconnector isolates the battery bank from the inverter without disconnecting individual battery terminals, which cuts the risk of arcing and shock during maintenance.\u003c\/p\u003e\u003cp\u003eNH00 is a standard industrial fuse cartridge format used widely across European solar and energy storage installations. The enclosure and disconnector are built to work together as a single protection and isolation assembly, suitable for wall mounting in a plant room or electrical cabinet.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBattery overcurrent protection in off-grid solar systems\u003c\/li\u003e\n\u003cli\u003eHybrid inverter battery isolation and protection\u003c\/li\u003e\n\u003cli\u003eHigh current DC protection for inverters rated 8kW and above\u003c\/li\u003e\n\u003cli\u003eLithium and lead-acid battery bank installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation and safety notes\u003c\/h2\u003e\u003cp\u003eThis assembly must be fitted by a qualified electrician. DC circuits in solar battery systems carry dangerous voltages and high fault currents, and fuse selection must match the cable rating and the maximum discharge current of the battery bank. Isolate all power sources before working on DC connections, and install to IET Wiring Regulations alongside the inverter and battery manufacturers' guidelines.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1x Fuse enclosure\u003c\/li\u003e\n\u003cli\u003e2x Mersen NH00 gL\/gG DC fuses (200A and 250A available, one for positive, one for negative)\u003c\/li\u003e\n\u003cli\u003e1x 250A DC disconnector\u003c\/li\u003e\n\u003cli\u003e1x Installation instructions\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mersen","offers":[{"title":"Add 2x NH 200Amp Fuses","offer_id":52060766830880,"sku":"S229878+P218766","price":152.25,"currency_code":"GBP","in_stock":true},{"title":"Add 2x NH 250Amp Fuses","offer_id":52060766863648,"sku":"S229878+E219815","price":152.25,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-s229878-p218766-1.webp?v=1785505558","url":"https:\/\/www.ledandsolar.co.uk\/products\/mersen-250a-dc-disconnector-fuses","provider":"LED \u0026 Solar","version":"1.0","type":"link"}