{"title":"Solar cells","description":null,"products":[{"product_id":"solarzelle-2w-6v-11-0cm-13-6cm","title":"Solar cell 2 W - 6 V, 11 x 13.6 cm, polycrystalline","description":"\u003ch3\u003eProduct overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003ePolycrystalline solar cell with a rated output of 2 watts\u003c\/li\u003e \u003cli\u003eOutput voltage of 6 volts, ideal for low-voltage projects\u003c\/li\u003e \u003cli\u003eDimensions of 110 cm * 136 cm for large-area use\u003c\/li\u003e \u003cli\u003eDirect use in outdoor measurements and mobile systems\u003c\/li\u003e \u003cli\u003eFrameless glass design with high light-to-area efficiency\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct description\u003c\/h3\u003e \u003cp\u003eThis polycrystalline solar cell generates up to 2 watts under optimal sunlight and delivers its energy at 6 volts. The output voltage is directly suitable for low-voltage circuits without a converter, as commonly used in prototypes and development projects.\u003c\/p\u003e \u003cp\u003eThe large format, measuring 110 centimeters in height and 136 centimeters in width, makes efficient use of the available solar area. Anyone planning outdoor energy harvesting or use on vehicles benefits from this size. The glass surface is frameless, making it easy to integrate the module into housings or mounting structures.\u003c\/p\u003e \u003cp\u003eTypical applications include wireless sensor networks intended to operate for extended periods without an external power source, as well as small pumps and LED systems in garden projects. The cell is also suitable for demonstrations of energy conversion in educational settings due to its adequate size and simple handling. The constant 6 V output simplifies circuit development, as it is compatible with many common battery nominal voltages.\u003c\/p\u003e \u003cp\u003eOperation requires unobstructed sunlight and a load or controller that stabilizes the output voltage when brightness fluctuates. A battery is required to store energy or buffer load peaks. The cell does not include connectors; wires are connected directly to the rear contacts or via external connector systems.\u003c\/p\u003e \u003ch3\u003eSafety notice\u003c\/h3\u003e \u003cp\u003eThe solar cell generates current and voltage when exposed to light. It is intended exclusively for building prototypes and for testing and development purposes and is not intended to supply installations connected to household power circuits. When working on or near electrical installations, consult a qualified electrician, especially if the cell is coupled with energy storage systems or inverters.\u003c\/p\u003e \u003ch4\u003eScope of delivery\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1x Solar cell - 2W, 6V, 11.0cm*13.6cm\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":65997863387485,"sku":"F23107307","price":8.19,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/solarzelle-2w-6v-110cm136cm-funduino-3197208.png?v=1791494230"},{"product_id":"solarzelle-3w-12v-14-5-14-5cm","title":"Solar cell 3 W - Monocrystalline, 12 V, 145 x 145 mm","description":"\u003ch3\u003eProduct overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMonocrystalline solar cell for 12 V systems\u003c\/li\u003e \u003cli\u003eRated power 3 W under standard test conditions\u003c\/li\u003e \u003cli\u003eDimensions 145 * 145 mm\u003c\/li\u003e \u003cli\u003eOpen conductor frame for framing or gluing\u003c\/li\u003e \u003cli\u003eTypical open-circuit voltage of approximately 21 V\u003c\/li\u003e \u003cli\u003eSuitable for prototypes and development projects\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct description\u003c\/h3\u003e \u003cp\u003eA monocrystalline solar cell with a rated power of 3 W generates direct current for small 12 V systems. With dimensions of 145 * 145 mm, it fits into test setups, model projects, and portable charging applications. The open conductor-frame design allows installation in custom-built housings or on flat surfaces.\u003c\/p\u003e \u003cp\u003eThe cell operates under standard test conditions (irradiance 1000 W\/m², cell temperature 25 °C). Typically, it provides an open-circuit voltage of approximately 21 V in full sunlight; under load, the voltage drops and the current adjusts to the load. Therefore, charge controllers or similar regulation circuits must be connected between the cell and a battery or onboard power system.\u003c\/p\u003e \u003cp\u003eApplications include portable solar chargers for small batteries, powering weather stations or monitoring sensors in hard-to-reach locations, as well as educational and experimental solar energy projects. Under ideal lighting conditions, a single 3 W cell is sufficient to slowly charge small batteries or power LED systems drawing a few milliamperes.\u003c\/p\u003e \u003cp\u003eFor practical operation, a charge controller, a battery for energy storage, and connection cables are required in addition to the solar cell. The output depends heavily on the angle of incidence of the light and sky brightness; under cloudy skies, the output drops significantly below the rated value. The cell tolerates long periods without polarization and requires no maintenance.\u003c\/p\u003e \u003ch3\u003eSafety information\u003c\/h3\u003e \u003cp\u003eThe solar cell generates direct voltage and current when exposed to light. It is intended exclusively for building prototypes and for testing and development purposes, and is not designed for connection to household power grids or permanent power supply infrastructure. When working on or near electrical installations, consult a qualified electrician.\u003c\/p\u003e \u003ch4\u003eScope of delivery\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1x Solar cell Solar Panel 3W 12V - Arduino-compatible 14.5 cm x 14.5 cm\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":65997876461917,"sku":"F23106437","price":10.27,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/solarzelle-3w-12v-145145cm-funduino-4435341.png?v=1791494271"},{"product_id":"solarzelle-3w-9v-12-5-19-5cm","title":"Solar cell 3 W - 9 V, 0.35 A, 12.5 x 19.5 cm","description":"\u003ch3\u003eProduct overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eSolar panel with epoxy resin coating\u003c\/li\u003e \u003cli\u003eRated power 3 W, 9 V operating voltage, up to 0.35 A\u003c\/li\u003e \u003cli\u003eTwo soldered cables, approx. 15 cm long\u003c\/li\u003e \u003cli\u003eDimensions 12.5*19.5 cm, approx. 88 g\u003c\/li\u003e \u003cli\u003eConnection via DC connector or screw terminals\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct description\u003c\/h3\u003e \u003cp\u003eThe solar panel consists of several solar cells connected in series that generate an electrical voltage when exposed to light. The epoxy resin coating protects the cells and contact points from moisture and mechanical damage.\u003c\/p\u003e \u003cp\u003eDuring operation, the panel delivers 3 W at an operating voltage of 9 V and generates an output current of up to 0.35 A, depending on the lighting conditions. Without a load, the voltage rises to approximately 10.5 V. The output current decreases accordingly in poorer lighting conditions.\u003c\/p\u003e \u003cp\u003eTwo cables approximately 15 cm long are already soldered on; one is marked positive, while the other forms the negative pole. A suitable DC connector set or screw terminals enable connection to microcontroller boards or charging circuits.\u003c\/p\u003e \u003cp\u003eThe panel is suitable for charging small batteries, providing autonomous power to electronics projects, and learning the basics of photovoltaics. With dimensions of 12.5*19.5 cm and a weight of around 88 g, the panel can also be used in portable applications. Depending on the requirements of the connected load, a charge controller or voltage regulator may be required in addition to the panel itself.\u003c\/p\u003e \u003ch3\u003eSafety information\u003c\/h3\u003e \u003cp\u003eIf the epoxy resin coating is damaged, moisture may penetrate and cause short circuits. The panel is intended exclusively for building prototypes and for testing and development purposes, and is not suitable for installation in household electrical systems.\u003c\/p\u003e \u003ch4\u003eScope of delivery\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1x Solar Cell Solar Panel 3W 9V - Arduino-compatible 12.5cm x 19.5cm\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":65997926629725,"sku":"F23107356","price":10.16,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/solarzelle-3w-9v-125195cm-funduino-1633439.jpg?v=1791494417"},{"product_id":"solarzelle-4-5w-6v-16-5-16-5cm","title":"Solar cell 4.5 W - 6 V, 16.5 x 16.5 cm, monocrystalline","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMonocrystalline solar cell with a rated power of 4.5 W\u003c\/li\u003e \u003cli\u003eOutput voltage of 6 V, ideal for direct-current circuits\u003c\/li\u003e \u003cli\u003eDimensions: 16.5 * 16.5 cm\u003c\/li\u003e \u003cli\u003eEfficiency of approximately 17 percent under standard test conditions\u003c\/li\u003e \u003cli\u003eFrameless design with a junction box on the back\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct Description\u003c\/h3\u003e \u003cp\u003eThis solar cell converts sunlight directly into electrical energy. With a rated power of 4.5 W at an output voltage of 6 V, it is suitable for small applications that do not require a battery storage system or controller, or as a charging source for 6-V batteries and rechargeable battery packs. Its monocrystalline structure achieves a conversion efficiency of approximately 17 percent, which is typical for this power class.\u003c\/p\u003e \u003cp\u003eThe solar cell only generates its full output under direct sunlight and when fully aligned with the sun. In diffuse light or shade, the current output decreases noticeably. The output voltage remains relatively constant regardless of the load, while the current changes with the intensity of the sunlight.\u003c\/p\u003e \u003cp\u003eApplications include small solar fans, pond pumps in garden ponds, auxiliary power for electric fences, or measuring stations in areas without access to the power grid. It can also provide self-sufficient power for battery-backed data loggers or continuous charging of nickel-metal hydride batteries. For a system that reliably supplies power even in cloudy conditions, a lithium or lead-gel battery is required as a buffer; the solar cell is then connected via a PWM or MPPT charge controller.\u003c\/p\u003e \u003cp\u003eThe solar cell is supplied without a mounting frame and without a charge controller. Permanent installation requires weather-resistant mounting, and the connections at the edge should be protected against moisture. No controller is integrated; the cell outputs its voltage directly. To use the full output, align the cell with the sun every day or combine it with a tracking system.\u003c\/p\u003e \u003ch3\u003eSafety Information\u003c\/h3\u003e \u003cp\u003eThe solar cell is intended exclusively for building prototypes and for testing and development purposes. It is not suitable for installation in a household electrical circuit or for use as a backup power source connected to the power grid. All work on systems with energy storage devices (rechargeable batteries, batteries) must be carried out by qualified electricians.\u003c\/p\u003e \u003ch4\u003eScope of Delivery\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1* Solar cell - 4.5W, 6V, 16.5*16.5cm\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":65997944095069,"sku":"F23107275","price":13.24,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/solarzelle-45w-6v-165165cm-funduino-1764954.png?v=1791495049"},{"product_id":"solarzelle-3-5w-6v-13-5-16-5cm","title":"Solar cell 3,5 W - 6 V, monocrystalline, 13,5 x 16,5 cm","description":"\u003ch3\u003eProduct overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMonocrystalline solar cell with a rated power of 3.5 W\u003c\/li\u003e \u003cli\u003e6 V output voltage, ideal for battery charging and small loads\u003c\/li\u003e \u003cli\u003eDimensions: 13.5*16.5 cm with an aluminum frame\u003c\/li\u003e \u003cli\u003eTempered glass protective layer\u003c\/li\u003e \u003cli\u003eThree connection terminals, sealed to be waterproof\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct description\u003c\/h3\u003e \u003cp\u003eThis solar cell converts sunlight directly into electrical power and is suitable for building off-grid systems with lower energy requirements. In direct sunlight, it delivers approximately 3.5 W of power. The 6 V output voltage is directly compatible with nickel-metal hydride batteries, small LED systems, or charge controllers for lithium batteries, without the need for additional voltage converters.\u003c\/p\u003e \u003cp\u003eThe monocrystalline cell structure achieves good efficiency even in weaker light, for example in cloudy conditions or in the morning and evening. With dimensions of 13.5*16.5 cm, the cell can be integrated into portable devices or small installations. The aluminum frame provides mechanical stability, while the tempered glass protects the cells from weather and mechanical stress.\u003c\/p\u003e \u003cp\u003eTypical applications include powering outdoor weather monitors and moisture meters, directly charging battery packs for mobile projects, or serving as a reliable power source for garden applications when a constant energy supply during daylight hours is sufficient. For installation, position the cell with a clear line of sight to the sun to maximize energy yield.\u003c\/p\u003e \u003cp\u003eHeavy shading significantly reduces output; in areas with little sunlight or during the winter months, energy yield decreases. Continuous power supply requires an energy storage system. The cell requires mechanical fastening and protection against standing water at the plug connections.\u003c\/p\u003e \u003ch3\u003eSafety notice\u003c\/h3\u003e \u003cp\u003eHigh currents can flow in the event of a short circuit, which may cause damage or create a fire hazard. The solar cell is intended exclusively for prototypes and development purposes. Qualified electricians are responsible for work on or near electrical installations; consult one before commissioning if anything is unclear.\u003c\/p\u003e \u003ch4\u003eScope of delivery\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1x Solar cell - 3.5W, 6V, 13.5*16.5cm\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":65998293008733,"sku":"F23106790","price":9.07,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/solarzelle-35w-6v-135165cm-funduino-6475417.png?v=1791495478"},{"product_id":"5a-solarladeregler-fur-lfp-akkus-mit-mppt-funktion","title":"MPPT solar charge controller 5 A - for LiFePO4 batteries, up to 100 V","description":"\u003ch3\u003eProduct overview\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eSolar charge controller for lithium iron phosphate batteries with Maximum Power Point Tracking\u003c\/li\u003e \u003cli\u003eInput voltage up to 100 V, maximum output current 5 A\u003c\/li\u003e \u003cli\u003eMPPT function automatically adjusts the voltage for optimal operation\u003c\/li\u003e \u003cli\u003eFor systems with a nominal voltage between 12 V and 48 V\u003c\/li\u003e \u003cli\u003eRS485 interface for data connectivity and remote monitoring\u003c\/li\u003e \u003cli\u003eDisplay shows the charging system and energy flow in real time\u003c\/li\u003e \u003cli\u003eGalvanic isolation between the solar and battery sides\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProduct description\u003c\/h3\u003e \u003cp\u003eA solar charge controller with an MPPT function (Maximum Power Point Tracking) makes optimal use of the solar system by continuously adjusting the input voltage of the photovoltaic modules to the point of maximum power output. This results in higher yields than with simple PWM charge controllers and fewer losses when charging lithium iron phosphate batteries, which require different charging curves than lead-acid batteries.\u003c\/p\u003e \u003cp\u003eThe controller processes input voltages of up to 100 V and continuously delivers a maximum of 5 A. This allows solar panels with a wide range of voltage combinations, from a small 12-V system to an extended 48-V system. Galvanic isolation between the solar side and the battery side prevents potential issues in larger systems.\u003c\/p\u003e \u003cp\u003eTypical applications include motorhomes and caravans, where additional solar modules on the roof recharge the onboard battery, as well as decentralized power supply in garden sheds and camping facilities. The system is also suitable for mobile power supply during long-term field measurements when no grid connection is available.\u003c\/p\u003e \u003cp\u003eThe device features an RS485 interface for remote monitoring and control over longer distances. The integrated display continuously shows the charging system and energy flow, eliminating the need for an additional measuring instrument. Connection requires appropriately sized solar panels, a suitable LFP battery, and connection cables with a sufficient cross-section; the exact requirements depend on the specific system configuration.\u003c\/p\u003e \u003ch3\u003eSafety notice\u003c\/h3\u003e \u003cp\u003eThis device is not intended for connection to household electrical circuits. It is intended exclusively for setting up solar systems, prototypes, and test purposes. Safety regulations must be observed when working on solar panels, batteries, or high-voltage cables; if in doubt, consult a qualified electrician before commissioning.\u003c\/p\u003e \u003ch4\u003eScope of delivery\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e1x\u0026nbsp;5A solar charge controller for lithium batteries with MPPT function\u003c\/li\u003e \u003c\/ul\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":66045585850717,"sku":"F23108247","price":12.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/5a-solarladeregler-fuer-lfp-akkus-mit-mppt-funktion-funduino-4494198.jpg?v=1791490575"},{"product_id":"solar-ladegerat-20w-faltbar-mit-usb-anschluss-ladegerat-fur-smartphones-arduino-20w-5v","title":"Foldable 20 W solar panel - USB connection, 5 V, waterproof","description":"\u003cp\u003eFoldable 20W solar panel - portable solar charger and solar power supply for Arduino, ESP32, smartphones, power banks \u0026amp; outdoor and IoT applications away from the power grid.\u003c\/p\u003e \u003cp\u003eThe foldable 20-watt solar panel is the perfect solution for generating power anytime while on the go. With high conversion efficiency, this portable solar charger provides energy for smartphones, power banks, GPS devices, and other USB-enabled devices even in lightly overcast conditions. Ideal for makers, camping, hiking, cycling, emergencies, etc.\u003c\/p\u003e \u003cp\u003eThanks to its compact, lightweight, and foldable design (only approx. 265g), this solar panel fits into any backpack and can be conveniently attached to a backpack, tent, or motorhome using the included carabiners. Its durable construction from monocrystalline silicon, PET, and nylon makes the panel waterproof, robust, and particularly long-lasting - perfect for all outdoor adventures.\u003c\/p\u003e \u003cp\u003eTechnical details:\u003c\/p\u003e \u003cp\u003eSolar power: 20 W\u003c\/p\u003e \u003cp\u003eOutput voltage: 5V \/ up to 4A\u003c\/p\u003e \u003cp\u003eMaterial: Monocrystalline silicon + PET + nylon\u003c\/p\u003e \u003cp\u003eColor: Black\u003c\/p\u003e \u003cp\u003eWeight: approx. 265g\u003c\/p\u003e \u003cp\u003eUnfolded size: approx. 50cm × 18.5 cm\u003c\/p\u003e \u003cp\u003eFolded size: 18.5 × 11.5 cm\u003c\/p\u003e \u003cp\u003e \u003c\/p\u003e \u003cp\u003eScope of delivery:\u003c\/p\u003e \u003cp\u003e1x foldable solar panel (20W)\u003c\/p\u003e \u003cp\u003e2x carabiners\u003c\/p\u003e \u003cp\u003eNotes:\u003c\/p\u003e \u003cp\u003eThis solar charger has no storage function. It supplies power only in direct sunlight.\u003c\/p\u003e","brand":"Funduino","offers":[{"title":"Default Title","offer_id":66045608558941,"sku":"F25110756","price":19.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1074\/5649\/5965\/files\/solar-ladegeraet-20w-faltbar-mit-usb-anschluss-ladegeraet-fuer-smartphones-arduino-20w-5v-funduino-5876918.jpg?v=1791490204"}],"url":"https:\/\/funduino.com\/en\/collections\/solar-cells.oembed","provider":"Funduino","version":"1.0","type":"link"}