Why PERC Technology is the optimum choice for Commercial Systems.
The strongest argument for using PERC technology on commercial properties in the UK is that space is often at a premium, roof space is limited, and land costs are high, compared to other solar markets.
Also, by using high efficiency, high-power (PERC) modules the system will pay for itself sooner through the reduction or elimination of utility bills and the cost saving, in the long run, is greater.
PERC technology lets solar cells absorb more light and gives them a higher internal reflectivity. which leads to increased energy density which translates to more power from the same physical module size.
PERC panels perform better under low-light conditions and high temperatures, so by effectively leveraging the modules with PERC technology end users are able to reduce the levelised cost of electricity (LCOE) for solar PV installations. Also despite potentially higher initial BOM cost end users can obtain a much faster ROI.
JA Solar PERC Modules
“The mass production conversion efficiency of PERC cell in JA Solar has reached 22.2% in the first half of 2019, and it is expected to reach 23% within one year. In addition, PERC technology combined with multi-busbar, half-cell, larger-size cell, and other technologies can further enhance the power,” – Dr Xinming Huang, senior vice president, JA Solar.
JA Solar’s newest generation Mono PERC Half-Cell modules combined with extremely reliable Solis 3 phase inverters.
Canadian Solar PERC Modules
“Going into 2019, we will soon convert all of our cell capacities into PERC technology. The successful mitigation of LeTID, combined with our gigawatt-scale high-efficiency module technologies such as Ku, BiKu, HiKu, HiDM and BiHiKu, further solidifies Canadian Solar’s leadership in solar technology and products”, commented Dr. Shawn Qu, Chairman and CEO of Canadian Solar.
Canadian Solar’s HiKu super high-power poly PERC modules and extremely reliable Solis 3 phase inverters.
A short explanation of PERC Technology
In addition to the standard back surface field (BSF) there are two additional steps in manufacture of PERC cells:
- Addition of a rear surface passivation film which improves light collection capacity by allowing the low energy photons to go through multiple bounces inside the solar device before escaping.
- Lasers or chemicals are used to open the rear passivation stack and create tiny pockets in the film to absorb more light.
These additional steps ensure a threefold return:
- Electron recombination is significantly reduced
- More light is absorbed
- Higher internal reflectivity is experienced
Not all sunlight is absorbed through non-PERC solar cells. But with a passivation layer on the rear of cells, unabsorbed light is reflected by the additional layer back to the solar cell for a second absorption attempt. This process leads to a more efficient solar cell.