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Solar Photovoltaic >  How does it work? |  System sizing | 

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Solar PV harnesses solar energy and converts it into electricity.

Solar Twin Ltd offer a range of dedicated dedicated services:

• System design
• Turn Key installations
• Product supply
• Technical support and commissioning

How does it work?

Photovoltaic (silicon) cells are connected in series and when light strikes these cells, it causes electrons to migrate in one direction and positive charges to migrate in the opposite direction, creating an internal electric field within the cell. The current in this field is collected by a grid of contacts on the top and bottom of the cell. PV cells are joined in modules and arrays of modules that can generate anywhere from 5 to several hundred watts of 12 Volt DC (direct current) power.

An inverter must be used to convert the DC to AC (alternating current) in most cases. Most commonly the inverter is connected to the mains distribution board which allows the PV system to supply the mains circuit of the property or feed back into the grid. In off grid applications the solar energy generated can be stored in batteries.

System sizing

We quote PV system sizes based on peak energy output (kWp). There are a number of factors to consider when sizing a PV system suitable for your needs such as:

• Available roof space
• Orientation and shading
• Specific energy / Carbon reduction target (new build only)
• Type of grid connection
• Or the budget you have available

Click here for a PV quotation