PowerFilm Solar Inc

Integrated Solutions

LightSaver Max Portable Solar Charger Rolled UpLightSaver Portable Solar Charger Unrolled

A complete solar power solution requires more than just a solar panel. Multiple components must work together efficiently to generate, control, and store the energy produced by a solar panel. We have the knowledge and expertise to recommend or design all these components to make sure your solar solution operates efficiently. 

 

Solar / PV 

unencapsulated thin film amorphous silicon solar material

We can provide the ideal solar cell, module, panel, or array to meet the power needs of your device or system. 

 

Storage

line of batteries

Many PV systems require a storage element, such as a rechargeable battery or supercapacitor, to balance the generated solar energy and provide a stable power output to the device or system, even when light is not present. We can help determine the right storage technology, size, and configuration that meets the needs of your application. 

 

Electronics

circuit board on an engineering desk

We will work with you to define the electrical requirements to inform the design or recommendation of appropriate charge controllers, voltage outputs, battery chargers, or other electronic features. 

 

Mechanicals

powerboost charge controller

By defining the mechanical requirements, we can design or recommend appropriate enclosures, cabling, connectors, sealants, and mounting hardware. 

 

Examples

 

Solution #1 (Optimal)

LightSaver Portable Solar Chargers. In the LightSaver Line, the solar charging circuit and USB outputs have both been designed carefully to achieve high efficiencies. Charging the battery directly from the solar panel means high charging efficiencies are possible, and a much smaller lighter panel can be used. The efficiency of power transfer from the solar panel to the battery is >90%.  

 

Solution #2 (Adequate)

Commercially available Li-Ion battery bank with USB input and output connected to a Soltronix 24W panel using an RA-14. In this case, the panel power is higher due to the powerboost charge controller. The PowerBoost controller is 90% efficient, and the RA-14 is 80% efficient. Typical battery bank USB charge electronics are 75-85% efficient. So, the total system is about 60% efficient.

 

Solution #3 (Poor)

Commercially available Li-Ion battery bank with USB input and output connected to a 7 Watt Rollable Solar Panel (R-7) using a 1A USB 12V Adapter (RA-14). In this case, the RA-14 acts as a charge controller and drops the panel’s voltage to 5V instead of the power point at 15V, so the panel is only able to produce a maximum of 30% of its potential power. Then there is further loss through the RA-14, which operates at about 80% power transfer efficiency. Finally, there is a loss in the USB charge electronics on the battery bank as well. Typical battery bank USB charge electronics are 75-85% efficient. So, the system is about 20% efficient compared to 90% efficiency for the LightSaver Line.

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