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Alternative Energy Tutorials on Energy Articles

Series Connected Solar Panels

monocystalline photovoltaic panel

Photovoltaic solar panels require sunlight (irradiance) to generate power so understanding how to connect solar panels in series strings is important. Not everyone can purchase the same model solar panel so wiring different wattage solar panels in series will increase the voltage but reduce the current and power output. Series connected photovoltaic panels can be used to charge batteries, operate motors, or to power any number of electrical loads as the output voltage is higher compared to a single panel

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Bypass Diode

Solar Panel Shading

Bypass diodes are a must for any photovoltaic solar panel as they protect the panel from overheating when shaded by trees, leaves or debris. When one solar cell of a panel becomes shaded while the other solar cells around it are illuminated by sunlight, hot spots can be created leading to overheating and eventual destruction of the affected shaded cell. A bypass diode is commonly placed on sub-strings of the photovoltaic panel usually one diode per 15 to 20 photovoltaic cells to maintain the load current delivery of the panel

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Pico Solar Systems

pico solar light

Pico solar systems use small scale photovoltaic panels for lighting and battery charging applications. There are still many people around the world who have no access to an electricity grid connection or require a portable energy source for camping or RV’s so pico solar systems can help in provide the essential energy required to fill this gap. Pico solar systems of only a few watts have experienced significant development in the past few years, combining very efficient LED bulbs with sophisticated charge controllers and energy efficient storage batteries providing power for lighting, phone charging or powering a radio, etc.

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How To Size A Solar System

alternative energy sources

Sizing a solar system for your home or garden, whether off-grid with battery backup or grid-tied can be a daunting task. But reducing your electricity usage through conservation and efficiency measures as wellas a good home design plays an important role in keeping down the size and cost of any photovoltaic (PV) system you want to install. Using energy efficient appliances and lighting, as well as non-electric alternatives wherever possible, can make an off-grid solar photovoltaic powered system a cost competitive alternative to the utility power grid

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Solar Cell I-V Characteristic

solar cell

Solar cell I-V characteristics curves show the current and voltage characteristics of a particular photovoltaic cell, module or array in order to give a detailed description of its solar energy conversion ability and efficiency at different light intensities. Solar cell I-V characteristics curves are use to measure a cells open-circuit voltage, short-circuit current, fill factor and efficiency with the rating of a PV cell or panel depending on these parameters

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Solar Cell Turns Photons into Electrons

solar cell

Photovoltaic cells turn the photons from sunlight into electrons producing a current flow, thus photovoltaic PV cells are powered by incident sunlight and so are commonly called solar cells. Solar cells are made using silicon based semiconductor materials with different electrical properties. An n-type semiconductor material with excess negatively charged electrons is fused together with a p-type semiconductor which has an excess of positively charged holes to create a p-n junction. When a photon of light hits this p-n junction, electrons are release to form an electrical current

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Solar Panel Review

photovoltaic panel

Solar photovoltaic panels convert sunlight into electricity as a renewable source of energy free from environmental emissions and pollution. Modern solar panel cells are made of doped silicon semiconductor material which transforms sunlight energy into electrical power. The technolgy used to produce this semiconductor material can be further categorised into two distinct subgroups of mono-crystalline silicon solar cells, and poly-crystalline silicon solar cells and here we review solar photovoltaic panels consisting of both types

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