7-Star Electric Power Solution

21/02/2024

সোলার স্ট্রীট লাইটঃ
🔹 15W (𝐒𝐑𝐄𝐃𝐀 & 𝐈𝐃𝐂𝐎𝐋 Approved)
🔹 20W (𝐒𝐑𝐄𝐃𝐀 & 𝐈𝐃𝐂𝐎𝐋 Approved)
🔹 30W (𝐒𝐑𝐄𝐃𝐀 & 𝐈𝐃𝐂𝐎𝐋 Approved)

সোলার প্যানেলঃ
🔹 𝟔𝟓𝐖
🔹 𝟖𝟓𝐖
🔹 𝟏𝟎𝟎𝐖
🔹 𝟏𝟑𝟎𝐖
🔹 𝟏𝟔𝟓𝐖
🔹 𝟑𝟑𝟓𝐖
🔹 𝟒𝟎𝟎𝐖
🔹 𝟓𝟎𝟎𝐖

𝐁𝐫𝐚𝐧𝐝 & 𝐏𝐚𝐧𝐞𝐥 𝐓𝐲𝐩𝐞:
𝐈𝐩𝐯𝐢𝐬𝐨𝐥𝐚 - 𝐌𝐨𝐧𝐨𝐜𝐫𝐲𝐬𝐭𝐚𝐥𝐢𝐧𝐞
(65W, 85W, 100W, 130W, 165W, 335W, 400W, 500W)

সোলার স্ট্রীট লাইট এর ব্যবহৃত স্থান সমূহঃ
☑️ গ্রাম কিংবা শহরের রাস্থা ঘাট
☑️ বিভিন্ন হাউজিং সোসাইটি
☑️ স্কুল/কলেজ/মাদ্রাসা
☑️ কবরস্থান, মসজিদ/ উপসনালয়
☑️ পার্ক কিংবা গার্ডেন
☑️ খামার কিংবা মৎস্য হ্যাচারি
☑️ বাড়ির আঙ্গিনা/ পুকুর এবং বাড়ির চারিপাশ
☑️ ছোট বড় শিল্প কারখানার আঙ্গিনা এবং চারিপাশ

সরবরাহকৃত সোলার স্ট্রীট লাইট এর বৈশিষ্ট্য সমুহঃ
☑️ আন্তর্জাতিক মানসম্পন্ন এবং সার্টীফীকেট প্রাপ্ত।
☑️ পরিক্ষিত এবং অনুমোদিত পণ্য
☑️ সহজ ইন্সটলেশন
☑️ দির্ঘস্থায়ী
☑️ নিরাপদ এবং পরিবেশবান্ধব
☑️ বিক্রয় পরবর্তী সার্ভিস
☑️ ঝড় বৃষ্টিতেও অবিচল থাকে
☑️ স্ট্রীট লাইট গুলো ১০ বছরের বেশি সময় ধরে কর্মক্ষমতা নিশ্চিত করে।
☑️ সোলার প্যানেলগুলি ২০ বছর বা তার বেশি সময় ধরে বিদ্যুৎ উৎপন্ন করতে সক্ষম।

ওয়ারেন্টি
☑️ স্ট্রীট লাইট =৩ বছর
☑️ সোলার প্যানেল = ২০ বছর

বাংলাদেশের অন্যান্য পণ্য এবং সেবাসমুহঃ
☑️ সোলার প্যানেল এবং সোলার ইনভার্টার
☑️ সোলার পাম্প- সারমার্সিবল / সেন্টিফিউগাল
☑️ পাম্প কন্ট্রোলার
☑️ সকল প্রকার সোলার সলিউশন
☑️ আবাসিক এবং বাণিজ্যিক সোলার প্লান্ট
☑️ সোলার অন গ্রিড , অফ গ্রিড এবং হাইব্রিড সিস্টেম

পাইকারি মূল্যে সোলার পণ্য অর্ডার করতে যোগাযোগ করুনঃ
𝐖𝐡𝐚𝐭𝐬𝐀𝐩𝐩: 01718849541

14/02/2017

150 KVA sub-station

11/10/2015

11/10/2015

Factors affecting LED lifespan
There are a number of factors that affect the useful LED lifetime. By ensuring that the LED is protected from adverse conditions it is possible to ensure the maximum lifetime is maintained.

Temperature: One of the major issues in ensuring the maximum life is obtained from a LED is keeping the temperature down. Excess temperature will considerably shorten the life. To prevent the LED chip running over temperature there are a number of elements that can be included within the design

Good thermal path from LED chip to mount: It is necessary to ensure that the heat can be effectively removed from the LED semiconductor itself. This is the first step in ensuring the LED junction temperature does not rise to high and adversely affect the LED lifetime.
Good bonding between LED and external mount: It is necessary to ensure that the LED package is effectively bonded to the element on which it is mounted. The thermal resistance should be as low as possible, possibly using thermal mounting grease t ensure complete contact.
Good heatsink: In order that heat is removed effectively from the overall assembly the heatsink on which the LED is mounted should have a low thermal resistance. It should also be located so that heat will flow away from the heatsink. For LED lighting, this is particularly important because often lamps will be located within small light fittings and this will not aid cooling, and hence the LED lifetime will be reduced.
LED drive level: To obtain the best LED lifetime, the LED should be driven well within its ratings. Overdriving a LED will drastically reduce its lifetime, although it will increase the light output.
Power supply: The power supply needs to match the light emitting diode for optimum LED life expectancy. Not only should the voltage be regulated, but the current also needs to be closely controlled to ensure the LED does not run outside its ratings, or even too close to its maximum ratings.
Environment: General conditions such as vibration, and temperature extremes - even when not operating - place mechanical stresses on the diode which will reduce the LED lifetime. Ideally, a LED should be operated within a stable dry environment. When this is not possible, a shorter LED lifetime should be anticipated.
Although it may appear obvious at first sight that the LED life should be as long as possible, this may not always be the main requirement. It is possible that in some cases light output is more important than LED lifetime, and in this case it may be permissible to overdrive the LED to obtain the additional light. Additionally budgetary constraints may limit the inclusion of more effective thermal management, and in this case a decision can be made to balance LED life expectancy against the cost.

04/07/2015

PNP & NPN Transistor symbols

10/05/2015

7 Star 18 watt, 22 watt LED with 3 years warranty

21/10/2014

28/04/2014

LED lighting is a lamp that uses LEDs as a source of illumination. Most lighting comes from an incandescent or fluorescent light bulb. Different than the traditional bulb, LEDs can be put into traditional lamps and used like most other light bulbs. They are much more efficient than incandescent or fluorescent bulbs. It is a third generation lamp.
LED stands for light-emitting diode. That is, simply, a semiconductor device that converts electricity to light by using the movement of electrons. LEDs were invented in Russia in the 1920s. They were put into practical use in the United States in 1960s by General Electric. In the late 1960s, Monsanto Corporation was the first to mass-produce LEDs, and Hewlett-Packard used them in its early calculators.
There are many consumer advantages to LEDs over incandescent or fluorescent light bulbs. LED lights consume much less energy. They are 300 percent more efficient than a compact fluorescent light (CFL), and 1,000 percent more efficient than an incandescent bulb. They have a very long life, about 50,000 hours of use at 70 percent of their original power. LEDs don’t burn out or flicker, they simply fade. This works out to eight hours a day for 13 years at 70 percent power. A typical 60-watt incandescent bulb may last about 1,000 hours.

28/04/2014

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