PLANET BSP-300 - Manual (Page 6)

User’s Manual of BSP-300
5
In physics, such an energy conversion process is called “photovoltaic” (PV) (photo = light, voltaic =
electricity).
Silicon is a chemical element with a representative symbol “Si” in chemistry; it has an atomic
number of 14; and it is a metal-like element. A silicon atom has four electrons in the outmost orbit.
Compared to carbon in the same column of the periodic table, silicon has a more stable chemical
property. Silicon is the most common element, but rarely appears in its elemental form in nature. It
usually exhibits a complex form of silicate or silica, which widely exists in rocks, gravel, and dirt.
Silicon is the eighth abundant element in the universe. In the Earth’s crust, it is the second
abundant element which makes up 25.7% of the total mass of the Earth’s crust, second only to the
most abundant element oxygen (49.4%).
In addition to the external dimensions, the specifications of photovoltaic (PV) panels include some
characteristic data:
￭ Voc = Open-circuit voltage
￭ Isc = Short circuit current
￭
Vmp (Vop) = Maximum operating voltage
￭ Imp (Iop) = Maximum operating current
￭ Vmp x Imp = Watt / (Max) Power
￭ Usually, the data shown in the brochure of a photovoltaic product are under the “international
Standard light source condition”: 100mW/m2
￭ i.e., the solar illuminance at noon in an unclouded summer day which is 1.2 million LUX at
the temperature of 25 degrees Celsius is used as the test condition.
￭ For the different climate at different locations, the efficiency of the solar panel will be
different.
1.2 Actions for Operation Safety
￭ All electronic and electrical operations must be carried out according to the local and/or
international electro technical regulations or standards.
￭ Before installation or use of such device, please read this manual as well as the instructions
and precautions for the controller, battery, solar panel and any other device.
CAUTION
The generic lead-acid battery may produce explosive gas, and the short circuit of
the positive and negative electrode of the battery may generate an electric current
up to thousands of amperes.
￭
Do not expose this product and the battery directly to the rain, snow or any type of liquid. For
outdoor installation, it is recommended that it would be better to install the device in a box with