{"product_id":"pv-heizstab-nachruestset-nexol-nex-r1-1-5-kw-energy-controller","title":"PV heating element retrofit kit Nexol NEX R1 1.5 kW with energy controller","description":"\u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eNexol NEX R1 – generate hot water directly with photovoltaic power\u003c\/h2\u003e \u003cp\u003eThe \u003cstrong\u003eNexol NEX R1\u003c\/strong\u003e is a plug-and-play retrofit system for the direct use of photovoltaic power for hot water preparation. The system consists of a screw-in heating element and an intelligent energy controller with touch display. It is suitable for compatible hot water and buffer tanks with a free \u003cstrong\u003e1 1\/2-inch screw-in socket\u003c\/strong\u003e.\u003c\/p\u003e \u003cp\u003eThe direct current generated by the connected PV modules is used directly to heat the tank water. A separate inverter is not required for this operating mode. If the PV output is insufficient, the NEX R1 can additionally heat via the 230-volt mains connection.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eStepless power control with MPP tracking\u003c\/h2\u003e \u003cp\u003eThe energy controller continuously adjusts the heating output to the currently available solar power. The integrated MPP tracking determines the optimal operating point of the connected PV module string, thereby supporting the best possible use of the available solar energy.\u003c\/p\u003e \u003cp\u003eThe maximum heating output is \u003cstrong\u003e1.5 kW\u003c\/strong\u003e. For the PV input, a rated voltage of at least 100 V is intended. The maximum PV open-circuit voltage is 300 V, and the maximum permissible PV short-circuit current is 15 A. Systems with a PV output of up to approximately 2,500 Wp are recommended as suitable.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eOperation and demand-based grid backup heating\u003c\/h2\u003e \u003cp\u003eOperation is carried out via the controller\u0026#39;s integrated touch display. Operating parameters and target temperatures can be adapted to the respective storage system and the desired hot water demand.\u003c\/p\u003e \u003cp\u003ePV energy is used primarily for water heating. If the current solar output is insufficient, the optional grid backup heating can supplement hot water preparation via the connection with 230 V and 50–60 Hz. This makes it possible to combine solar self-consumption with demand-based hot water supply.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eFor storage tanks up to 300 liters\u003c\/h2\u003e \u003cp\u003eThe NEX R1 is intended for suitable hot water and buffer storage tanks with a volume of up to 300 liters. The screw-in heating element has a connection thread of 1 1\/2 inches and a heating rod length of 350 mm. The overall dimensions of the heating element are 89 × 89 × 500 mm.\u003c\/p\u003e \u003cp\u003eBefore installation, the connection thread, installation length, and the available interior space of the storage tank must be checked. When installed, the heating element must not collide with heat exchangers, thermowells, anodes, or the storage tank wall.\u003c\/p\u003e \u003c\/div\u003e \u003cstyle\u003e .product-th{margin-top:2rem} .product-th h2{margin:0 0 1rem} .product-th__table{width:100%;border-collapse:separate;border-spacing:0} .product-th__table td{padding:.95rem 1rem;vertical-align:top} .product-th__label{font-weight:700;width:38%;color:#213670} .product-th__value{color:#1f2937} .product-th__table tr:nth-child(odd) td{background:#f4f7fb} .product-th__table tr:nth-child(even) td{background:#fafbfd} \u003c\/style\u003e \u003cdiv class=\"product-th\"\u003e \u003ch2\u003eTechnical data\u003c\/h2\u003e \u003ctable class=\"product-th__table\"\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eModel\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eNexol NEX R1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eHeating output\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e1.5 kW\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eHeating rod length\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e350 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eHeater dimensions\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e89 × 89 × 500 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eConnection thread\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e1 1\/2 inch\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum tank volume\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e300 liters\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eRecommended PV output\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eup to 2,500 Wp\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003ePV nominal voltage\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003efrom 100 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum PV open-circuit voltage\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e300 V\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum PV short-circuit current\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e15 A\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMains connection\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e230 V \/ 50–60 Hz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eProtection rating of heating element\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eIP65\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eProtection rating of controller\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eIP21\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum operating temperature\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e80 °C\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum operating pressure\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e10 bar\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMPP tracking\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eYes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eOperation\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eTouch display\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eOrigin\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eMade in Germany\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eInstallation\u003c\/h2\u003e \u003cp\u003eMechanical installation on the storage tank as well as connection to mains voltage, PV DC voltage, and protective conductor must be carried out by appropriately qualified specialist personnel. The storage tank must be completely filled and vented before electrical connection.\u003c\/p\u003e \u003cp\u003eThe screw-in heating element may only be operated when the heating elements are completely surrounded by water. Dry operation can damage the heating element and poses a safety risk.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eImportant planning notes\u003c\/h2\u003e \u003cp\u003eBefore installation, the technical limit values of the PV module string must be compared with the input data of the controller. The maximum PV open-circuit voltage of 300 V and the maximum short-circuit current of 15 A must not be exceeded even under unfavorable temperature and irradiance conditions.\u003c\/p\u003e \u003cp\u003eThe suitability of the storage tank must be checked based on connection size, installation length, operating pressure, operating temperature, and available interior space. The NEX R1 supplements an existing hot water system and does not replace professional system planning.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eScope of delivery\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eNexol NEX R1 energy controller with touch display\u003c\/li\u003e \u003cli\u003eAC\/DC screw-in heating element with 1 1\/2-inch connection thread\u003c\/li\u003e \u003cli\u003eMains connection cable with protective contact plug\u003c\/li\u003e \u003cli\u003ePrepared connection cables for system operation\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"NEXOL","offers":[{"title":"Default Title","offer_id":58262206021980,"sku":"NEXR1","price":741.73,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/gema-shop-nexol-nex-r1-pv-heizstab_a82d8416-6f3e-4883-af72-1da9134f6222.jpg?v=1783926303","url":"https:\/\/ie.gemashop.de\/products\/pv-heating-element-retrofit-kit-nexol-nex-r1-1-5-kw-with-energy-controller","provider":"GEMA Shop","version":"1.0","type":"link"}