High efficiency solar panels thrive in residential systems where space is often limited.
The majority of residential solar panels have around 15-18% efficiency. But high-efficiency modules offer a greater, more reliable power yield and speed up ROI in the long run.
At Segen there’s a great selection of high efficiency modules that are ideal for situations where shading or other obstacles prevent a consistent stream of sunlight or on tricky sloped roofs where only a few solar panels are suitable.
High Efficiency Modules:
LG NeON® 2 and NeON® R modules are both examples of high efficiency modules.
Back contact technology: where all electrical contacts are on the back of the cell – is a significant contributor to performance that ranges from 19.3% to 21.4%.
Another example of high efficiency modules are large wafer modules from JA Solar (18.8% -20.2%).
Their wafers are now 158.75mm square – it’s a long way from the first silicon ingots that were just 20mm in diameter!
Canadian Solar’s HiDM High Density Mono PERC modules also achieve high efficiency status.
Coming in at well above 19%, they use shingled cells so there’s less inactive space in between the cells while PERC technology further maximises yield.
Panasonic modules use HIT solar cells (Heterojunction with Intrinsic Thin layer) that consist of monocrystalline hybrid wafers.
Which are coated with thin, amorphous silicon and achieve high efficiency ratings of more than 19%.
Levelised Cost Of Electricity
LCOE = Total cost of ownership (£) / System production over its lifetime (kWh)
It’s common knowledge that more efficient solar panels cost more than their less efficient counterparts.
So it’s important to ensure that the upfront cost difference is justified by the increased saving achieved by generating more electricity over the lifespan of the system.
Another design factor is that system costs are highly dependent on the power density of solar panels while other costs, such as labour, inverters and mounting are not going down over time, so the most significant lever to reduce costs is to increase the efficiency of the panels.
Finally, the environmental cost of a panel, including mounting, transport, etc. is the same if 100W or 1000W, so a 10% more efficient panel will have a 10% lower environmental cost.