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.