(Taizhou) Solar Technology Co., Ltd, made it into the list with its
high-efficiency, high-power, and high-reliability N-type TOPCon modules，winning the title of
"Best Performance" in module reliability issued by PVEL and DNV GL
world’s leading independent laboratory, PVEL tests solar modules from leading
solar manufacturers as part of its Product Qualification Program (PQP), and
publishes the annual PV Module Reliability Scorecard based on these test
annual photovoltaic module reliability scorecard project, PVEL has rigorously
reviewed the modules produced in the factory in the past 18 months, and
conducted the test to determine the performance of the modules. PQP covers
multiple test contents such as thermal cycle, damp heat, dynamic mechanical
load, PID (Potential Induced Degradation) and PAN file. Currently, in these
performance tests, the N-type TOPCon module of Jolywood have been proven
excellent, especially the two test results of "PID192/LID+LETID" are
very eye-catching and outstanding.
the advantages of raw materials and structure, N-type TOPCon cell has many
advantages such as no PID, zero LID (light-induced-degradation), better weak
light response, lower risk of cracking, high performance and high reliability,
which lead to higher long-term benefits.
of cells, Jollywood has achieved outstanding results in N-type TOPCon
technology in recent years. The newly released J-TOPCon 2.0 cell is based on a
new generation of tunnel oxide layer and doped polysilicon deposition
passivation contact technology. It has the advantages of no LID degradation,
low temperature coefficient, high reliability, which provides a strong
guarantee for further reducing the cost of electricity.
A study published
by Fraunhofer at the EU PVSEC in September 2018 showed that LeTID is prevalent
in all commercial components available on the market. LeTID occurs when modules
temperatures above 50°C. The mechanisms that cause LeTID include factors such as
hydrogen-induced degradation, passivation degradation, and metal impurities.
Its LeTID can exceed 10%, which is much higher than LID.
In November 2018,
UNSW reported the latest research of LeTID. The research showed that:
1) LeTID degradation
mainly occurred in the body area, followed by surface inactivation;
2) With the increase
of temperature, the LeTID increases;
phosphorus-doped N-type silicon wafers, the recovery can be observed after LeTID
degradation under the condition of light, and the recovery time decreases with
the increase of light;
phosphorus-doped N-type silicon wafers, no secondary LeTID was observed after
the LeTID was restored under 1~1.5 solar irradiation.
and NREL researchers have systematically studied and tested the temperature of
the modules in different environments, indicating that the temperature of the
modules will exceed 75 ° C in desert and hot and humid areas. In high
temperature areas like the Middle East, especially attention should be paid to
the anti-LeTID performance of modules, N-type bifacial modules are
1) N-type silicon, there is no B-O defect
composite like in P-type silicon, long lifetime, less affected by LeTID than P-type
2) N-type bifacial modules can allow part of
near-infrared light to pass through, with lower working temperature and lower
3) In the case of light, the LeTID will be recovery
quickly, the greater the light intensity, the faster the recovery;
4) No secondary LeTID after recovery.
Therefore, N-type bifacial modules have excellent Anti-LeTID performance with its
outdoor evidences show that the modules of Jolywood show a very low LID, which
is far better than the mainstream bifacial products in the market. LID will
play an important role in total return on investment, return on capital and
cost per kilowatt hour of photovoltaic project. In the case of the highest LID
and the lowest LID, the difference of the total investment rate of return will
reach 0.8%, while the difference of the KWH cost will reach 1.8 cent/kWh. If the back gain of the bifacial module and
double-glass is considered, the difference will reach about
when selecting modules in the market, the LID of modules should be fully
considered to reduce the risk of competitive electricity price and improve the
series of high-efficiency solar modules promoted by Jolywood have released a
total of 3 products. Niwa Pro and Niwa Super are equipped with the world’s
first global pioneer J-TOPCon2.0 half cell technology, which can be widely used
in large-scale ground power stations, floating power stations, and distributed
power stations, BIPV and other projects. The more than 80% bifaciality makes it
suitable for various installation and environment, such as vertical
installation, oblique installation, and high-efficiency power generation can be
also maintained under extreme conditions such as snow, desert and other high
temperature, strong wind and sand. Niwa Black, mainly used in BIPV, adopts an
all-black aesthetic design, which provides high-efficiency power generation and
meanwhile highlights the exquisite appearance, and brings the ultimate home
photovoltaic experience to customers. Niwa series products are truly noble but
not expensive, and have the best of both worlds.
the demand for PV will only increase. Exwatt forecast that the new module
capacity will reach 100GW by the end of 2021. As the price of photovoltaic raw
materials rises, module suppliers are faced with a tough choice between cost
and quality. With the development of large size and half photovoltaic cell
design, modules are faced with greater probability of crack, and the market has
put forward higher requirements for the reliability of modules.
Lower Micro-crack Risk
of modules is a difficult problem in photovoltaic power stations. The crack is
an invisible defect produced inside solar cells, which the naked eye cannot be
judged, so it needs the help of professional testing equipment. However, crack
will seriously affect the lifetime of power station and actual power
generation, so crack is a major potential trouble in the construction of
photovoltaic power station.
bifacial solar cells have a symmetrical structure and less internal stress.
Silver paste is printed on both sides of the N-type cells to improve the
stability. N-type bifacial cells have higher reliability, especially in the
frequent sandstorm weather like the Middle East, and the modules have to
withstand the test for decades. It can be said that reliability is a very
important assessment index for modules, and N-type bifacial cells have unique
advantages in this respect.
increasingly prosperous photovoltaic market, photovoltaic products are
competing for leadership. With its excellent product quality management and
control ability, product testing and R&D strength, Jolywood stand out with its
high efficiency and reliability N-type TOPCon solar products and establish the
leading position of photovoltaic technology.