Sunday, 23 October 2016

solar ek haqeeqat ek afsana

سولر ایک حقیقت ایک افسانہ




جعلی شمسی پینل یا ڈمی : کیا اور کیوں ؟

ایک جعلی شمسی پینل، جو کہ ےتیکنیکی ماہرین کی زبان میں " ڈمی" کہا اتا ہے۔ مثال کے طور پر اگر آپ بغیر کوئی جگہ چھوڑے سولر پینل ایک نا ہموار تعداد میں بچھانا چھاتے ہیں تواسے استعمال کیا جاتا ہے۔

fake solar panel cellGerman
اس صورت میں جمالیاتی وجوہات کے لئے ایک یا کئی اضافی ڈمی پینل اکثر تنصیب کی جاتی ہے اور اسکی سب سے بڑی وجہ سولر پینل کی تعداد کو یکساں کرنے کے لئے منتخب کیا جاتا ہے.

ڈمی سولر پینل صرف اسکی ظاہری شکل انسٹالیشن میں استعمال ہونے والے سولر پینل کی مشابہت کی وجہ سے لگائی جاتی ہے۔ اس سے کسی بھی قسم کی توانائی حاصل کرنا مقصود نہیں ہوتا۔ فرق صرف اتنا کہ ڈمی پینل پر سیلز نہیں ہوتیں بلکہ اسے مونو ہا پولی والے پینلز کی شکل دینے کیلئے اسٹیکر پرنٹ ہوتا ہے، باقی سب (چوڑائی، موٹائی، رنگ، وغیرہ) وہی ہوتیں ہیں۔


fake solar panel cellGerman

"CellGerman" سیل جرمن درحقیقت کیا ہے؟

جیساکہ آپ نے اوپر جان لیا کہ ڈمی پینل کیا ہوتے ہیں بلکل اسی طرح سیل جرمن پینل یا دوسرے اور جعلی برانڈ سولر پینل میں یہ ڈمی کی طرح کے اسٹیکرز کے ساتھ اصلی سولر سیل لگائے جاتے ہیں

ڈمی پینل اصلی پینل کی قیمت کا صرف ایک حصہ کی لاگت میں آتی ہے. اس پر ہمارے ملک کے کچھ لوگ اس طرح کے آئڈیا پہ کام کیا کہ اصلی پینلز میں یہی ڈمی پینل میں استعمال ہونے والے اسٹیکرز کو لگاکر انہیں "جرمن کیو سیل" یا پھر "سیل جرمن" دیا جاتا ہے جس کا جرمنی سے کوئی تعلق نہیں ہے۔


fake solar panel cellGerman

زیادہ تر آج کل چمن،تورخم، افغان بارڈر سے کنٹینرز میں ریڈی اسٹاک سولر پینل جوکہ ریجیکٹیڈ مال ہوتا ہے لایا جاتا ہے اور مختلف برانڈ ناموں کے اسٹیکرز پرنٹ کرکے پورے پاکستان میں بھیج دیا جاتا ہے۔ اس سے ایک تو ملکی خزانے کو نقصان پہنچ رہا ہے بلکہ اس پیشہ سے وابستہ وہ ادارے اور افراد جو واقعی اس پیشہ میں اہلیت رکھتے ہیں نا امید ہوتے جا رہے ہیں کیونکہ وہ اس طرح کے سستے مال کا مقابلہ اپنے قانونی طریقے سے درآمد شدہ سبھی دنیا کے نامور برانڈ کے مال کے ساتھ مقابلہ نہیں کر پاتے اور عام عوام بچارے ان پروڈکٹس میں فرق نہیں کر پاتے اور اپنا پیسہ 5 سے 10 سال کی قلیل مدت میں ختم ہوجانے والی پروڈکٹس پر ضائع کردیتے ہیں۔

متبادل توانائی سے وابستہ جوآلات یعنی سولر پینل ، انورٹر ، بیٹری وغیرہ درآمد ہوتے ہیں۔ اس پر ابھی تک کوئی ریگولیٹری اتھارٹی رائج نہیں جو ہی بتاسکے کہ ان آلات کا معیار یعنی کوالٹی کیا ہے۔ ضرورت اس امر کی ہے کہ حکومت فوراً ریگولیٹری اتھارٹی کا قیام کرے اور ایسے لوگوں کو فیل فور گرفتار کرے جوکہ بلا جھجک ایسے کام کو فروغ دے رہے ہیں۔

Hybrid inverters vs battery inverters for home solar energy storage

Hybrid inverters vs battery inverters for home solar energy storage


Home solar energy storage is quickly coming into the mainstream in Pakistan, thanks to the low cost of solar PV installations here. Every home that installs a battery storage system will need an inverter to convert the stored DC electricity into grid & appliance-friendly AC electricity. The two main choices available are battery-specific inverters and so-called ‘hybrid’ or multi-mode inverters. What are the relative strengths and weaknesses of each of these types of solutions with regard to the role they play in energy storage systems?

Standard solar PV inverters

The basic function of a solar PV inverter is to convert the DC electricity generated by solar panels into AC electricity. Although individual products may each have their own bells & whistles, without performing this integral function they cannot be called an inverter. Solar PV inverter brands are plentiful in Pakistan – Voltronic Power's Axpert (available with different name e.g. Tesla, Inverex and etc), SMA, Fronius, Schneider Xantrax, INVT, ABB/Power-One and Zeversolar are just a handful of the popular brands here.
SMA SunnyBoy TL Inverter image

    Pros:


  • Time-tested technology – used widely in grid-connected solar systems around the world
  • Countless product options available

  • Cons:

  • Possible to include battery storage, but battery side of the system will require a separate inverter
  • eparate energy management system may be required to maximise overall system efficiency

Hybrid solar inverters


In the context of residential solar+storage systems, a hybrid inverter (sometimes referred to as a multi-mode inverter) is an inverter which can simultaneously manage inputs from both solar panels and a battery bank, charging batteries with either solar panels or the electricity grid (depending on which is more economical or preferred). Their capabilities may go beyond this however – some devices also handle inputs from wind turbines, generators and other power sources.

Fronius-Symo-Hybrid image

    Pros:


  • All-in-one inverter solution for grid-connected solar-plus-storage systems
  • Frequently intelligent and programmable for maximising overall system efficiency and savings
  • Can usually be installed without batteries for future expansion
  • Long history of use in off-grid and stand-alone power systems

  • Cons:

  • Less design flexibility than modular solutions which use separate PV and battery inverters
  • Generally less efficient than dedicated solar-only or battery-only inverters


Battery inverters


Battery-specific inverters manage the charging and discharging of a battery bank. Just as with other inverters, their job is to convert DC electricity into AC electricity, but they also do the reverse – converting AC electricity into DC in order to charge a battery bank. Battery inverters can be installed into homes where no solar PV system exists for purposes of energy arbitration (i.e. using cheap off-peak grid electricity for battery charging), but most homes are more likely to install them in order to capture and store excess solar energy. Their modular nature means that they can be retrofitted relatively easily onto existing solar PV systems.

Fronius-Symo-Hybrid image

    Pros:


  • Modular nature lends to greater system design flexibility
  • Long history of use in off-grid and stand-alone power systems means most units are exceptionally sturdy and durable
  • Can be retrofitted onto existing solar PV systems for addition of battery storage








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Saturday, 24 October 2015

These Off Grid Solar Lights Are Made By The Communities Who Use Them

These Off Grid Solar Lights Are Made By The Communities Who Use Them

Liter of Light works with women's cooperatives to make solar lights from simple parts, instead of sending them solar lights that don't work the way they want them.

When solar lights or other small solar projects are sold or donated to off-grid communities, the ending isn't always as expected: If something breaks and no one made a decent plan for repair, it's possible the product will end up in the trash.
After seeing this happen in the Philippines, social entrepreneur Illac Diaz decided to take a different approach. Instead of importing solar products, his organization, Liter of Light, works with the local community to make everything locally. Repairs and replacements become simple.
3035089-inline-i-2-these-off-grid-solar-lights


"One of the things micro-solar products don't tell us is that it hasn't really been that successful in the developing world," Diaz says. "The products are designed to fail. When parts break, there's nothing to fix it. I see large amounts of solar thrown in landfills. The real gift is to teach us to have our own solar industry—so we can make it here, find local parts to repair it, and grow it from the bottom up, not top down."
Liter of Light works with women's cooperatives to make simple solar lights from a handful of parts, including both recycled components and a new high-tech chip guaranteed to make the light last 70,000 hours. Everything is packaged in a recycled water bottles to protect the components. The water bottles are covered with handcrafted woven shades, providing a new outlet for local basket-weaving skills that are no longer in much demand.3035089-inline-i-1-these-off-grid-solar-lights
The community-based approach provides a steady supply of everyday products, and is also designed to provide a quick response to disasters like Typhoon Haiyan. "When a storm can hit 14 million houses and wipe it out in 24 hours, you really need a new kind of response," says Diaz. "You can't wait for foreign agencies to come in."
After a disaster, supplies are often slow to arrive. "Usually people think we're flooded by things like solar lights, but you have to wait for your turn in the production cycle, taking sometimes two to three months," he explains. "Then you have shipment, and customs. By the time the solar lights actually hit this kind of large scale devastation, it's usually like six to seven months too late."
Liter of Light has trained an "army of student volunteers" to make the lights, so when a disaster occurs, they will be able to spring into action, providing construction and making water filtration equipment along with the lights. The lights can be used for homes, but the organization also provides street lights for safety, a need that Diaz says is often overlooked.
In the two years that the organization has been in operation, it has distributed 360,000 lights in 15 chapters around the world. Diaz hopes to reach 1 million lights by the end of next year, and provide an alternative to other technology that is typically sold through microcredit or, in some cases, donated but then not supported.
"We're trying to explain that there should be some type of independence," he says. "If you really want to help people move out of poverty, one of the most important things to do is teach us the skills of what to do—like how to make and repair solar. Unless skills and technologies are turned over, we can never build a social enterprise big enough to help the real bottom of the pyramid."
Diaz is one of this year's TED Fellows, and will be speaking at TEDGlobal2014.
[Photos: via Liter of Light]