BALANCE OF SYSTEM (BOS)




The complete photovoltaic (PV) system comprise of three subsystems;



The BOS typically consists of structures for mounting the PV arrays or modules and the power-conditioning equipment that adjusts and converts the dc electricity to the proper form and magnitude required by an alternating-current (ac) load.

When needed, the BOS also includes storage devices, such as batteries, for storing PV-generated electricity to be used during cloudy days or at night.


BOS Components


We know that the BOS component can significantly impact the project implementation time which can be extremely costly to the project's overall profitability. We also understand that assembling complete renewable systems can be overwhelming.

Therefore, our in-house engineering team is ready to source the right component that suits your project, assembling and coordinating the right BOS components. We offer the following BOS components from the industry's leaders:


Batteries Charge Controllers Monitoring Devices
Cables Connectors Over-current Protection
Disconnects Combiner Boxes Grounding Hardware
Enclosures Fastening Hardware Lightning Protection
Other essential system and associated components

Mounting Structures


Photovoltaic arrays have to be mounted on some sort of stable, durable structure that can support the array and withstand wind, rain, hail, and other adverse conditions. Sometimes, the mounting structure is designed to track the sun.

Stationary structures are usually used with flat-plate systems and generally tilt the PV array at a fixed angle that is determined by the latitude of the site, the requirements of the load, and the availability of the sunshine.

Whatever your projects needs are, we can provide you with the right mounting structures.


Tracking Structures


There are two general kinds of tracking structures:



Whatever your projects needs are, we can provide you with the right tracking systems.


Power Conditioners


Power conditioners process the electricity produced by a PV system to make it suitable for meeting the specific demands of the load. Although most of this equipment is standard stock, it is extremely important to match the capabilities of these devices with the characteristics of the load. Power conditioners may have to perform these functions:



The requirements of power conditioners generally depend on the type of system they are integrated with and the applications of that system.
Whatever your projects needs are, we can provide you with the right power conditioners.


Storage


In many PV systems, energy will not be used as it is produced but may be required at night or on cloudy days. If tapping into the utility grid is not an option, a battery backup system will be necessary.

The drawbacks to batteries are that they decrease the efficiency of the PV system, because only about 80% of the energy channeled into them can be reclaimed. They also add to the expense of the overall system and must be replaced every five to ten years. They take up considerable floor space, pose some safety concerns and require periodic maintenance.

Batteries can also serve as a power conditioner for these loads by regulating power; this allows the PV array to operate closer to its optimum power output. Most batteries must also be protected from overcharge and excessive discharge, which can cause electrolyte loss and can even damage or ruin the battery plates.

Protection is usually achieved using a charge controller, which also maintains system voltage. Most charge controllers also have a mechanism that prevents current from flowing from the battery back into the array at night.