Serious concerns on quality of RFID taggingx

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14 Δεκ 2013 (πριν από 3 χρόνια και 9 μήνες)

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Serious concerns on
quality of
RFID
tag
for MNRE solar projects in India


In MNRE
-

Manufacturers meeting held on 27
th

May 2013 we heard the grievances of the module
manufacturers regarding the inside lamination of RFID tag. Particularly, manufacturers have highlighted
the problem of



de
-
lamination,



decrease in module efficiency and



reading issue


Coresonant

would like

to kindly submit that the above challenges are primarily due to use of non
-
original (cloned/duplicate) RFID chips which are available at 40% cost of the original chips.


We have supplied over 1.5 million original

PVID

RFID tags last year and our tag failu
re rate is under
0.01%. This is a clear indication that the above challenges can be overcome if original chips & inlays are
used and spurious chips of Eastern makes are avoided.


Further expertise is needed on setting the reader & tag in
-
line with producti
on system.

We would also like to draw your kind attention to the following serious concerns on quality of RFID
tagging by overseas manufacturers.


In our visit to many solar plants, we extensively observed that imported PV modules that arrive with
pre
-
fixed RFID tags are highly unreliable
tags
and not complying with MNRE requirements. The RFID
chips in the imported modules are




not of original make



d
o not provide 25 year data retention guarantee



encoded partially without complying to all MNRE mandated data




low
-
bonding adhesive used



adhesive lacks 25years of warranty



the enclosures not able to withstand site conditions & mechanical wear & tear



not loc
ated on panel consistently







MNRE has shown immense pragmatism by mandating RFID tagging on PV modules under its JNNSM
scheme. Now to ensure that the mandate serves the purpose and all project developers strictly comply
with the requirement, it needs to
be enforced that



all project developers should carry out RFID tagging at site in India



original genuine RFID chips & inlays need to be used



the data retention period should be at least 50 years



data encoded should include the details of project owner, ti
me period, & site location



the tag enclosure should be IP68 tested with certificate to be produced



adhesive used should be of Very High Bonding class



The success of JNNSM lies in the flourishing of solar projects across India without any malpractice or
misuse. In the endeavor RFID plays a critical role and needs to be enforced strictly. Mandating the above
requirements will ensure that MNRE succeeds in its highly acclaimed mission.


Submissions to arrive at RFID standardization for solar projects:



The
primary reason for facing the above mentioned challenges is due to limited awareness of RFID
technology.


We do agree that there needs to be standardization of RFID use in the solar module under MNRE
projects. However, before we submit our points we would

like to elicit our observation in past three
years.


There are two types of RFID technologies used in solar industry. Those are HF & UHF, both these tags are
accepted by state nodal agencies as we understand from our in
-
person participation during the
in
spection process.


In the beginning of 2010, most manufacturers like Solar Semi, Titan Energy, Surana espoused HF tags
due to higher memory and better performance in metal environment, while around the same time EPC
companies like L&T, Azure power, KSK cho
se UHF tag due to the read range & cost factor. Later in 2011
-
12 it was observed that module manufacturers increasingly shifted towards UHF tag.






A brief comparison
of
HF & UHF
RFID tags for Solar Modules:

Technology

UHF( Ultra High Frequency)

HF(High F
requency)

Operating Frequency

860
-
960 MHz

13.56MHz

Read Range

20cm~ 1 m with Desktop Reader(200 m.watt),
2~4 m with HHT(1000 m.watt)

2 ~8 cm

Memory

512 bits

1k, 2k

Suitable for MNRE

Yes

Yes

Storage Temp

-
20°C to +8
0°C

-
20°C to +70°C

Life of the tag

25~50 years

10 years

Cost of Hardware

High

Low

Cost of Tags

Low

High


So to arrive at RFID standardization we see the following alternatives:


Standardize both HF & UHF:



Whether to us HF or UHF RFID tags, the choice is of Solar companies. However, the challenges
are

i)

MNRE need to have two type of readers for inspection

ii)

Need to go for individual standardization by frequency

iii)

Need to mandate the adhesive that to be used. Ex:

3M, Avery Dennison

iv)

Standardization of memory allocation of data encoded in to the tag


Standardize on HF:



If chose to go with HF RFID tag
, the challenges are

o

shorter read range

o

wide UHF user base of manufacturers & EPC companies who are already adopted U
HF
technology.




Further, other challenges in HF includes,

o

standardization of memory allocation

o

need to restrict the manufacturers to use the module Id with fixed digits under MNRE.
Ex: CSPL12345678 (12 digit).

o

same as module Id model number to be
standardized. Ex: CSPL230( For 230watt)

o

number of IV curve points to be encoded in to the RFID tag?







Standardize on UHF:




UHF RFID tag

is the leading technology being used across Solar so it will be in line with the
current scenario. As in case of HF, we need to standardize data, memory and IV points in UHF as
well


Advantage of UHF tag over HF:

(a)

Higher read range

(b)

Lower cost

(c)

Greater data
retention period of 25~50 years

(d)

Thinner chip compared to HF so fits well inside the lamination

(e)

Sleeker dimension to fit within the extra space of panel (both Thin & Crystalline)

(f)

Widespread adoption of UHF technology in solar industries (Manufacturers & EPC
s)


In conclusion, we would like to submit that if UHF is standardized it will precisely serve the purpose of
RFID mandate of MNRE and will also be favorable in line with current industry adoption.





Contact:

Srikanth Reddy

Sr. Business Development
Executive


Coresonant Systems Pvt. Ltd.

ISO 9001:2008 certified company

M: +91 9010511411

Srikanth@coresonant.com