Solar Panels

A solar panel (also solar module, photovoltaic module or photovoltaic panel) is a packaged, connected assembly of photovoltaic cells. The solar panel can be used as a component of a larger photovoltaic system to generate and supply electricity in commercial and residential applications.

Solar panels use light energy (photons) from the sun to generate electricity through the photovoltaic effect. The structural (load carrying) member of a module can either be the top layer or the back layer. The majority of modules use wafer-based crystalline silicon cells or thin-film cells based on cadmium telluride or silicon. The conducting wires that take the current off the panels may contain silver, copper or other non-magnetic conductive transition metals.

The cells must be connected electrically to one another and to the rest of the system. Cells must also be protected from mechanical damage and moisture. Most solar panels are rigid, but semi-flexible ones are available, based on thin-film cells.

Types of solar panels we offer:

• Poly-crystalline
• Mono-crystalline
• Amorphous thin film

Mono-crystalline

• The standard choice for most solar installations.
• Good power-to-size ratio and efficiency of 13-17%, with the exception of some high quality panels.
• Good performance in cooler conditions.
• The most commonly used technology in the world, with over 50 years of technological development.
• Excellent life span/longevity. Usually comes with a 25 year warranty.

Poly-crystalline

• Poorer efficiency (12-15%, with notable exceptions).
• Cheaper than mono-crystalline.
• Slightly better performance in hotter conditions (lower heat de-rating coefficient)
• Excellent life span/longevity. Usually comes with a 25 year warranty.

Amorphous thin film

• Low conversion efficiency (6-8%, with notable exceptions).
• Expected lifespan is less than crystalline panels.
• Optimal efficiency in hot weather, less effective in cooler conditions.
• 3-6 month ‘breaking in’ period where long term output is exceeded.
• Requires 2-3 times more panels and surface area for same output as crystalline.
• Ideal for example for inland Australia, where conditions are hot and vacant space abound.