What is a 5 busbar solar panel?

What is a 5 busbar solar panel?

SolarWorld has started shipping their new, higher efficient 5 busbar solar panels. The busbars are the metal lines you see going down the individual squares, or cells, of the solar panel. They are the wires that connect each cell to the other, allowing the current to flow.

What is the use of busbar in solar panel?

Busbars 101 In a solar panel, there’s a thin strip of copper or aluminum between cells that conducts electricity called a busbar. It separates solar cells and conducts the direct current the cells collect from solar photons to the solar inverter, which converts the direct current into useable alternating current.

Are bus bars necessary?

When space is limited or alternative electrical distribution is required, busbars are fit for purpose. Because they are so robust and resilient, busbars can withstand external weather conditions extremely well, which makes them a prime candidate for being used on electrical substations or switchyards.

What is 5BB in solar panel?

5BB means 5 bus bars, these are the silvery bars that are screen printing on the front surface of a solar cell. The bus bars are designed as conductor that collect the electricity. The number and the width of bus bar are mainly depend on the cell’s size and designed efficiency.

What is multi busbar?

The multi-busbars (MBB) approach aims to reduce resistive losses by reducing the amount of current that flows in both the fingers and the busbars. Busbars are normally printed flat and require soldered flat ribbons to carry the current away from the cell, introducing more shading and resistive losses.

What are the advantages of multi-busbar solar cells?

This higher number of busbars reduces the distance between the busbars, which decreases the internal resistance losses. Even if the higher quantity of busbars increases the shading of the solar photovoltaic cell, the overall performance of multi busbar cells remains much better than that of conventional 2BB or 3BB cells.

Why do solar panels have so many busbars?

Many large PV module manufacturers, such as Solarworld and Trina Solar, increasingly focus their production on solar PV modules using Passivated Emitter Rear Contact (PERC) solar cells with 5BB frontside contacts. This increased number of busbars reduces the internal resistance losses, which is due to the lesser distance between the busbars.

What is the difference between Bus wire and row wire in solar?

Only, the bus wire has to carry the bus current, which is many times larger than the row current. Hence the bus wire has to be thicker and broader. Both are sold in rolls of various sizes. The most common solar cell design involves 2 or 3 full-line busbars printed onto the cell.

What determines the efficiency of a solar panel?

The cell design plays a significant role in panel efficiency. Key characteristics include silicon type, wafer size, number of busbars and finger layout. The high-cost IBC cells are currently the most efficient (20-22\%), due to the high purity N-type silicon cell base and no losses from busbar/finger shading.