5
FUNCTION
The solar panel converts sunlight energy into DC electrical power and can be used to charge a
rechargeable battery. This product is designed to charge 12V deep cell batteries, which are commonly
used in cars, RVs, ATVs, boats and other motor vehicles.
NORMAL OPERATING CONDITIONS
Operation temperature:
5˚C – 60˚C
Operation Humidity:
20%RH~80%RH
Air Pressure:
86kPa~105kPa
ENERGY OUTPUT
As a general rule, the user should establish the amps required to run the appliances and multiply
them by the expected module voltage.
Power calculations
Amp hours (Ah) = Current (Amps) x Working Time (Hours)
Module power (W) = Current (Amps) x Expected module voltage (V)
After completing these calculations the capacity of the solar panels can be established.
Example: The following table represents a typical portable appliance configuration:
APPLIANCE
WATTS
VOLTAGE
AMPS
HOURS
AMP HOURS
12V fluorescent light
8
12V
0.65
4
2.6
12V bandW television 20
12V
1.67
1
1.67
12V radio
5
12V
0.42
1
0.45
12V fan
4
12V
0.33
5
1.65
12V travel iron
120
12V
10
1/6
1.67
12V fridge
45
12V
3.75
6
22.5
ESTIMATED CONSUMPTION
30.51
Amp hours: 30.51 Amp hours per day
Assumption: the solar panel is exposed to 6 hours of suitable sunlight each day.
The required current from the system would be 30.51 amp hours/6 hours = 5.09 A
The required watts of the stem would be: 5.09 A x 12.2 V / 0.8 = 110W
(17.2 - Module vmp, 0.8 - Power consumption factor)
In this example, a 110w panel is required to run the appliances for the desired time.
