How to Choose the Best PV Panels for Your Building
A selection of solar panels based on the following:
Electronic devices operating voltage and current requirements
The use of the environment
Operational needs of current and voltage
To determine the requirements for your operating system current and voltage. Devices for direct energy supply equipment, calculate the needs of the whole system.
Charging the battery voltage
First, select the required operating voltage of the solar module. In general, the voltage of 3 to 3.6 volt solar panel for charging the battery, two AA rechargeable 1.2 volt. Operating voltage 7.2-volt solar panel will receive five 1.2 volt rechargeable battery or a 6-volt gel or lead acid batteries. Voltage of 15.4 volts for a solar module 12 volt gel or lead acid batteries.
Do not charge alkaline batteries. Alkaline batteries are not rechargeable.
You can with the battery manufacturer to determine if you think that the battery and components of solar energy for its full implementation.
Charging the battery current Select the solar module under the appropriate operating system to load the device. In general, do not charge the rechargeable battery to 10% more than the rated capacity of energy storage. For example, a 700 mA charger, solar time can safely provide 70 mA of operating current.
Increase the connection method of the circuit voltage and current
You can parallel or series connection of solar panels to get a higher voltage (series) or higher (in parallel). However, such a restriction on the use of touch the block: for example, two MP3-37 model or two models MP7.2-75, but not mixed with used. Parallel connecting two similar blocks will provide twice the current touch, feel connected to series of three similar blocks will triple the output voltage.
Warning! It is not the recommended method of solar panels connected in series with the output voltage of 48 volts (48V) or more devices. Voltage of 48 volts or more can cause fatal injuries!
The use of the environment
If you use the external environment must be permanently withstand the exposure to wind and rain and the environment, ultraviolet solar system may have been a need for stability and protection against moisture damage. (In rare cases, these factors may be important. For example, if the work or the use of time less than a year). WeatherProTM PowerFilm solar product line is designed for permanent outdoor use and designed to protect.
environment moderate use of solar energy components from China, the strength and durability requirements generally do not have to WeatherProTM PowerFilm . The use of personal and environmental factors will be very different. In the type of specific use to test the solar panel of your choice, to ensure their appropriateness to the questions above to the specific application requirements.
specific application needs
Some use solar energy for specific applications with special needs. For example, the ultra-thin, specific tracks, the solar panel can flip the rear of the device, equipped with pressure sensitive adhesives, and so on.