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Grid-off Solar Power System Composition
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Solar power is promising new-style energy. It has three advantages: permanency,
cleanness and flexibility. As long as the sun exists, solar power generation is of
one-time investment but long-term usage. Compared with thermal power and
nuclear energy power�generation, solar power generation will not cause
environmental pollution. The solar power system develops big, medium-sized
and small ones, ranging from 1000MW medium-sized power station to solar
power group only for one household, which are incomparable superiorities to
other power sources.
The presence of a functional electricity grid is not always as obvious as it would seem to be. An insufficient
infrastructure is often the cause for an unreliable grid. Things become even more difficult when there is no
grid at all. And yet you are in need of a reliable electricity supply. A local and properly functioning system is
the only answer at this point.
Grid-off Solar Power System
Introduction
A typical grid-off solar power system consist of solar panel, combiner box, solar charger controller, battery,
Inverter and some necessary accessories.
Grid-off Solar Power System Compositon
Grid-off solar
power system
composition
Solar
panel
Solar
charger
controller
Battery
Inverter
Combiner
box
1.Solar panel
The solar panel is the core of the solar power system, which is also of the highest value compared with others. Its
function is to make the sun's radiation be converted to electrical energy, sent or stored in batteries, or to promote
the work load. The solar radiation is directly converted into electricity by means of photoelectric effect. The basic
equipment of photo-electricity conversion is the solar battery, which is a device used to convert sunlight power
into electric energy directly by photovoltaic effect. It is a semiconductor photo diode. Irradiated by the sunlight,
the photo diode will convert the sunlight power into electric energy and produce electricity. When a lot of batteries
are in series or parallel, it will be a solar cell matrix which has great output power.
3.Battery
Generally, storage battery is lead-acid batteries.
Nickel-metal hydride batteries, nickel-cadmium
batteries and lithium batteries are also used in the
micro and small systems. Its function is to make the
solar panels of electricity be stored when exposed
to the sunlight and be released when needed.
4.Inverter
Generally, the direct outputs of solar power are
12VDC, 24VDC, 48VDC. In order to provide
electricity for 220VAC appliance, DC-AC inverters
are needed to transform the direct current
generated by the solar power system into the
alternating current.
5.Combiner box
Combiner box can access multiple photovoltaic
array at the same time. It makes the system more
safety
2.Solar charger controller
Its function is to control the entire system, and
played a battery charge protection, over-discharge
protection. It also can make up the temperature if it
is the qualified controllers, especially in the area
with big difference in temperature. Other auxiliary
function of controlling of light and time is selectable.
Grid-off Solar Power System
Solar Controller
Solar Panel
Batteries
InverterLoad
Load
Model
ESM250-156
DP-12300
ESCC-M060D-B
ESC3000
SCB4
/
/
/
Specifications
250W/30V
12V/300AH
48V/60A
3KW/48V
220VAC/50HZ
/
/
/
/
Quantity
12
8
1
1
1
1
1
1
pcs
pcs
pcs
pcs
pcs
set
set
set
Product
Solar panel
Battery
Solar charger controller
Inverter
Combiner box
DC Cable with connector
Mounting bracket
Battery bracket
System configuration table
�3KW Grid-off Integrate System Provide by EverExceed