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| Main | Solar Cells | Solar Modules |
In most cases, a solar modules consists of 36 or 72 ( 2 x 36 )
solar cells. These 36 solar cells are connected in series to obtain an operating voltage at STC of around 17 V. The current of the module depends on the size and efficiency of the solar cells.
The initial application of solar modules was to charge 12 V lead-acid
batteries, which are the equivalent to car-batteries today. To obtain an
optimal charging voltage, the solar modules were designed with 36 cells -
or multiples thereof. Although that voltage never occurs in practical
application, a solar module with 36 cells in one row is still known as 12 V module
and accordingly 72 cells as a 24 V
module.
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Solar Module made of Monocrystalline Solar Cells, Cables and Fast Connecting Systems |
An operating voltage at STC of 17 V ensures that even in warm areas, where the
solar cells loose voltage due to the negative temperature coefficient, a 12 V battery can still be charged.
To manufacture a solar module, the solar cells are all connected in series, soldered and laminated within some special back-sheet materials onto the glass.
The module will then be mounted into an aluminium frame to provide
stability during transport, installation and operation. For large systems,
the attached junction box is equipped with cables and fast-connecting systems,
which facilitates speedy installation.
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Solar Module made of Polycrystalline Solar Cells, Cables and Fast Connecting Systems
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