Portable Power Module for Güralp Certimus
Operation
the green curve. Total energy is the integral of power with respect to time so it is
represented by the areas under the curves. The area under the red curve must be
more than the area under the green curve for the installation to be feasible. If this is
not the case, a larger, more powereful panel must be used or additional panels
installed.
The PPM's battery will be charging whenever the red curve is above the green curve
(unless it is already fully-charged) and discharging whenever it is below it.
We can overlay a third curve showing the percentage charge of the battery. This is
proportional to the amount of energy stored and is shown by the blue curve below:
It can be seen that, in this example, the second day has not provided enough energy
to fully charge the battery but the third day has provided more than enough to
compensate.
The PPM is designed for use with "12 volt" solar panels. Note that this is a nominal
voltage and the actual output of the panel will vary between zero and around 18 volts.
Caution:
The voltage input to the PPM must never exceed 32 volts.
The PPM is designed to work with a wide range of 12 volt solar panels. Modern,
mono-crystalline photovoltaic panels are recommended for their high efficiency.
Flexible “roll up”, semi-flexible and foldable versions are available, which can
significantly simplify installations with poor accessibility.
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Issue A - May 2021
