{"product_id":"nexol-nex-r2-pv-heizstab-nachruestset-1-5-kw-zweizonenheizung","title":"Nexol NEX R2 PV heating rod retrofit kit 1.5 kW with two-zone heating","description":"\u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eProduct Overview \u0026amp; Area of Application\u003c\/h2\u003e \u003cp\u003eThe Nexol NEX R2 is a PV heating rod retrofit kit for suitable hot water and drinking water storage tanks with two free threaded sockets. The system uses the direct current from connected photovoltaic modules directly for electric hot water preparation. An additional inverter is not required for PV heating operation.\u003c\/p\u003e \u003cp\u003eThe NEX R2 is particularly suitable for larger hot water storage tanks and for systems where rapid hot water availability is to be combined with the most comprehensive possible use of the available photovoltaic power.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eTwo-zone heating for targeted tank loading\u003c\/h2\u003e \u003cp\u003eThe system operates with two electrically insulated heating elements. The upper heating element preferentially heats the upper tank area so that usable hot water is available more quickly. The available PV power can then be used to further heat the lower tank area.\u003c\/p\u003e \u003cp\u003eThanks to this two-zone control, the tank is not exclusively heated evenly from below. Instead, the NEX R2 first prioritizes the upper zone relevant for hot water draw-off and then uses additional solar energy for further tank loading.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eEnergy Controller with integrated MPP tracking\u003c\/h2\u003e \u003cp\u003eThe Nexol Energy Controller handles the control, temperature monitoring, and power distribution between the two heating elements. Operation is via a 2.8-inch color touch display.\u003c\/p\u003e \u003cp\u003eThe integrated MPP tracking adapts the power consumption to the currently available power of the connected photovoltaic modules. The maximum usable PV power is 1.5 kW. For a suitable system design, an installed PV power of approx. 2.5 kW is recommended.\u003c\/p\u003e \u003cp\u003eThe photovoltaic modules are connected via MC4 connectors. The permissible PV input range includes a minimum rated voltage of 100 V, a maximum open-circuit voltage of 300 V, and a maximum short-circuit current of 15 A.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eOptional backup heating via the power grid\u003c\/h2\u003e \u003cp\u003eWhen photovoltaic power is low or unavailable, hot water preparation can optionally be supported by electric grid backup heating. The grid connection operates at 230 V with a power of 1.5 kW.\u003c\/p\u003e \u003cp\u003eThe grid backup heating can be used or deactivated depending on the system configuration and the selected settings. For the grid connection, a fuse rating of 10 to 16 A is required.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eFor retrofitting suitable hot water storage tanks\u003c\/h2\u003e \u003cp\u003eFor installation, two suitable threaded openings with 1 1\/2 inch threads each are required. The insertion depth of the heating elements is 350 mm. In addition, the required installation space inside the tank must be taken into account.\u003c\/p\u003e \u003cp\u003eThe two heating elements have an unheated area of 100 mm. The housing of the heating elements is designed with IP65 protection rating. The Energy Controller has IP21 protection rating and is intended for installation in a dry indoor area.\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} .product-th__group td{background:#213670!important;color:#fff!important;font-weight:700;padding:.8rem 1rem} \u003c\/style\u003e \u003cdiv class=\"product-th\"\u003e \u003ch2\u003eTechnical Data\u003c\/h2\u003e \u003ctable class=\"product-th__table\"\u003e \u003ctbody\u003e \u003ctr class=\"product-th__group\"\u003e \u003ctd colspan=\"2\"\u003eEnergy Controller\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eDisplay\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e2.8-inch color touchscreen\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eAmbient temperature range\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e5 to 40 °C\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003ePermissible humidity\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e10 to 95 %, non-condensing\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003ePermissible degree of pollution\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eProtection class\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eIP21\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eWeight\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e2.4 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eDimensions\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e339 × 177 × 104 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr class=\"product-th__group\"\u003e \u003ctd colspan=\"2\"\u003eHeating elements\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eNumber of heating elements\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e2\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum heating 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\"\u003eScrew-in depth\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e350 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eProtection class\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eIP65\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eScrew-in 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\"\u003eUnheated area\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e100 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum tightening torque\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e60 Nm for brass thread\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eWrench size\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e60 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum operating pressure\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e1 MPa \/ 10 bar\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eDimensions per heating element\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\"\u003eElectrical insulation\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eYes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr class=\"product-th__group\"\u003e \u003ctd colspan=\"2\"\u003ePhotovoltaic specifications\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eRecommended installed PV output\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e2.5 kW\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMaximum usable PV 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\"\u003eMinimum PV rated voltage\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e100 V DC\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 DC\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\"\u003ePV connections\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eMC4\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eMPP tracking\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003eIntegrated\u003c\/td\u003e \u003c\/tr\u003e \u003ctr class=\"product-th__group\"\u003e \u003ctd colspan=\"2\"\u003eOptional mains connection\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eOutput\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e1.5 kW\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eInput voltage\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e230 V AC\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eInput frequency\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e50 to 60 Hz\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd class=\"product-th__label\"\u003eRequired fuse protection\u003c\/td\u003e \u003ctd class=\"product-th__value\"\u003e10 to 16 A\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eInstallation instructions\u003c\/h2\u003e \u003cp\u003eThe two heating elements must be screwed horizontally into the designated tank sockets. During operation, the heated areas of the elements must be completely surrounded by water.\u003c\/p\u003e \u003cp\u003eBefore installation, check the existing connection threads, the available installation space, the tank geometry, and the position of existing immersion sleeves or heat exchangers. The heating elements must not touch the tank wall or any other components.\u003c\/p\u003e \u003cp\u003eThe maximum tightening torque of 60 Nm must not be exceeded for a brass thread. A wrench size of 60 mm is required for installation.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eElectrical installation\u003c\/h2\u003e \u003cp\u003eThe Energy Controller may only be operated within the specified ambient conditions. Installation must be carried out in a dry and adequately ventilated indoor area.\u003c\/p\u003e \u003cp\u003eWork on the photovoltaic DC circuit, the optional 230 V mains connection, and the protective conductor may only be carried out by appropriately qualified specialist personnel. The maximum PV open-circuit voltage of 300 V and the maximum PV short-circuit current of 15 A must not be exceeded.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"gema-section\"\u003e \u003ch2\u003eScope of delivery\u003c\/h2\u003e \u003cul\u003e \u003cli\u003eNexol Energy Controller\u003c\/li\u003e \u003cli\u003eTwo electrically insulated screw-in heating elements\u003c\/li\u003e \u003cli\u003eConnection cables for the system components\u003c\/li\u003e \u003c\/ul\u003e \u003c\/div\u003e","brand":"NEXOL","offers":[{"title":"Προεπιλεγμένος Τίτλος","offer_id":58262251110748,"sku":"NEXR2","price":853.87,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/7796\/6428\/files\/gema-shop-nexol-nex-r2-pv-heizstab-set_c0cb0650-dc16-4dad-affd-5845bbfb85df.jpg?v=1783926311","url":"https:\/\/cy.gemashop.de\/en\/products\/nexol-nex-r2-pv-heating-rod-retrofit-kit-1-5-kw-two-zone-heating","provider":"GEMA Shop","version":"1.0","type":"link"}