YEAR I |ISSUE I | DEC 2017

MD’s DeskGreetings and a warm welcome to our Issue 1 of SOVASANDESH, our new monthly Newsletter designedespecially for people who are associated with our SovaFamily.I hope you enjoy this issue and do let us know if thereare any topics you’d like to see covered in the future.We appreciate your support and are so happy to haveyou as a reader of SOVA SANDESH.

SOVASANDESH

News Letter of SOVA SOLAR LTD.

EDITORIAL"Sandesh-e aati hain…"

Decades have gone by, but since the invention of mankind "sandesh"or news is the most essential part of our lives. Sova Solar is alreadyinto the news since its inception back in 2008. Now it is time topublish the important ones and circulate them to make us moreavailable, more relatable, and most importantly, more close to you!As already known, Sova is an established brand in the RenewableEnergy Sector since last few years. With the hope of reaching out tomore and more people we are on the verge of publishing our ownNewsletter, namely "Sova Sandesh". The goal is to feed people withinformation on the solar field, the future of renewable energy, themarket-scenario, Sova's achievements, Sova's future planning.Alongside, to make it more interesting and entertaining, news fromoutside renewable world will also be featured.Since it's a new beginning, we welcome you to extend your kindsupport by giving us your valued feedbacks and opinion. We hopeyou enjoy the debut version of the News Letter, and do let us knowif any other topics you'd like to add in the future.

CONTENT

Editorial Team: Mr.Soumyen Mukherjee, Mr.Krishnendu Mukherjee,Mr. Amal Nayak, Mr.Saugata Datta, Mr.Soumya Chattopadhyay,

EDITORIAL 01

MD’S DESK 01

NEWS OF THE MONTH 02

ARTICLE OF THE MONTH 02

VISITORS OF THE MONTH 03

FUN ZONE 03

EMPLOYEES CORNER 04

SUBRATA MUKHERJEE

SOVASANDESH

HAND IN HAND WITH L&T

SOVA SOLAR PANELS INSTALLEDON FOOD TRUCK IN SANGLI

News of the Month

MODULE SUPPLY AT REGIONAL H.O OF SBI

One of our most prestigious clients is Larsen & Toubro (L&T). We feelproud to announce that presently we are supplying our modules to L&Tfor their 7.5MWp project at Bihar Power Distribution Company Limited,which includes both South Bihar Power Distribution Company Limitedand North Bihar Power Distribution Company Limited. We have beenawarded the order of total module supply by L&T and we are about tofinish the job within December.

Another prestigious supply that we have done recently is at the RegionalHead Office of State Bank of India situated at Kolkata. M/s. PoweroneMicro Systems Private Ltd. has done the project and we have supplied45KWp modules to this prestigious project.

Article of the MonthWHAT IS PID?

The term Potential–Induced Degradation (PID) was first introduced in the English language in a published study by S. Pingel and coworkersin 2010. It was introduced as a degradation mode resulting from voltage potential between the cells in the photovoltaic module and ground.Research in this field was pioneered by the Jet Propulsion Laboratory, focusing primarily on electrochemical degradation in crystalline siliconand amorphous silicon photovoltaic modules.It is worthy to mention that, Sova Solar Ltd., is associated with a team of IIT (Kharagpur ) lead by Prof. Jatin Roy who has wide vista ofknowledge on PID. In his research work he has published many vital issues in this regard.What is Potential Induced Degradation (PID)?The phenomenon described here only occurs in modules with cells made of crystalline silicon. If the modules have a negative potential toearth in operation, there is an equally high negative voltage between the cells of the PV module and the aluminium frame, which is earthedfor safety reasons. The effect is stronger, the closer the module is to the negative pole of the PV array, as the potential there (and thus thevoltage between cells and the aluminium frame) can reach more than half the amount of the array voltage. As a result, electrons from thematerials used in the PV module can separate, follow this electric field and finally flow out via the aluminium frame. The result is an increasingcharge (polarisation) of the module, which adversely changes its characteristic curve and thus its power unless countermeasures are taken. The characteristic curve of a PV module in the original state and during the degradation process a decreasing slope with a virtually unchangedopen-circuit voltage and short-circuit current, while the maximum power (MPP) decreases by 30 percent or more, is typical.* The electriccharge of the PV module is so critical because of the way solar cells work. The photovoltaic effect is based on the combination of two differentsemiconductor materials to establish an internal electric field by exchanging charges. It is this field that causes the electrons freed by lightenergy to move from their location and flow past the contacts as electric current. Additional load carriers can considerably interfere withthis effect, causing a significant loss of power. However, it has been found that this polarisation can generally be reversed. Accordingly it isnot an irreversible effect such as corrosion and normal aging-related deterioration. The term "Potential Induced Degradation"* was first usedin the 2010 publication by module manufacturer Solon, which examined the phenomenon in detail.IEC TS 62804-1:2015(E)IEC TS 62804-1:2015(E) defines procedures to test and evaluate the durability of crystalline silicon photovoltaic (PV) modules to the effectsof short-term high-voltage stress including potential-induced degradation (PID). Two test methods are defined that do not inherently produceequivalent results. They are given as screening tests; neither

-Soumyen Mukherjee, President-Sova Solar

SOVASANDESH

Visitors of the Month

Ratan KumarFrom Bihar Power

Distribution Company Limited

P KumarFrom BOSCH, Bangalore

Prabhakar KumarFrom SBI

Anish Sinha,Ram Prakash

Piyush NagoriFrom KEC

INTERNATIONAL

Fun Zone

SHORTEST & TALLESTOF SOVA SOLARMR. ANKUR BARANWAL &MR. PANKAJ GULERIA

Employee of the Month

Partha GaraiDepartment: Quality

SOVASANDESH

Employees Corner

New JoineeSOURAV DASTRAINEE JR. ENGINEERMAINTENANCE

ARNAB KARMAKARTRAINEE JR. ENGINEERMAINTENANCE

RANJIT CHAKRABORTYOPERATORDESPATCH

RABIN GARAITRAINEE JR. ENGINEERMAINTENANCE

SOUMYADEEP BANERJEETRAINEEPRODUCTION

PhotographySUN-KISSED KANCHANJUGHA

Soumya ChattopadhyaySr. Manager, Sales & Marketing

| Department: Quality

Kalyan RoyManager, HR & Admin

LIGHT, THROUGH DARKNESS

Published By: SOVA SOLAR LTD. | DLF GALLERIA, Office No. DGK 917, 9th floor, Block No. BG-8, AA-IB New Town, Kolkata 700 156, West Bengal, India.Ph. +91 33 4008 2772 |Fax: +91 33 4006 2773 |E-mail: sales@sovasolar.com | www.sovasolar.com