Portland Solar Panels - Factory Direct Sale:A-Grade High Efficiency 250W Poly Solar Panels

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Our solar cells are widely used in solar pump, solar lighting, lamps, household electricity, traffic, communication, meteorological, building and photovoltaic power plants and so on.

Characteristics

Max Power Voltage Vmp(V): 30.4

Max Power Current Imp(A): 8.26

Open Circuit Voltage(V) : 37.5

Voc(V)Short Circuit (A): 8.88

Current Isc(A)Max Power Pm(W): 250

Temperature Coefficient of Cells

NOCT	45
Temperature Coefficients of Isc(%/℃）	0.04
Temperature Coefficients of Voc(%/℃)	-0.34
Temperature Coefficients of Pmp(%/C)	-0.42

Mechanical Data

Limits

Guarantees

Products Guarantee	12yrs free from defects in materials and workmanship
Performance Guarantee	No less than 90% within 10yrs and no less than 80% within 25yrs
Certificates	TUV(IEC61215&IEC61730), CE

IV Curve

Factory Direct Sale: A-Grade High Efficiency 250W Poly Solar Panels

Q:Hey guys :)Well I'm in the middle of doing my PSHCE coursework on sustainable energy, focusing on solar panels. I just wanted to ask you what your opinions are of them? Are they really worth it? Are they sustainable? Will they reduce our energy bills? Those sort of questions :)If you are interested in installing solar panels, please mention that, as it would be great! There's lots of information about them on this site ----: I have a boat in a sunny place and four 80 watt panels. These will run my fridge Tv and a few LED's. I still have to run my engine for hot water and washing machine. My Batteries only last a few years and are a real pain. I go on the mains when I can to get the batteries topped up. The panels are ok if there is nothing else, they are not the answer to the future of energy supply. There is also the moral aspect of the feed in tariff. For the rich to load their electricity bill onto the less well off is not acceptable and those panels on the roof tell all your neighbors that you are doing it. That will show a greedy selfish attitude. If they are any good why don't the power companies buy them and save buying coal?

Q:Im looking at making a self build iPad solar panel charger, Is it possible to get a small solar panel, a battery to hold charge and then a USB output? nothing fancy, just power in and power out?: Homemade okorder

Q:will at least consider them for their home electricity? I've seen several articles that new technologies are now being used, but it doesn't seem to be promoted to residential apps. I've even seen that the solar technology will be used in paints in the near future.: As the cost of fossil fuels continues to rise, solar panels become of more value. At one time they were looked on as a rather expensive investment with only a long-term pay off. Now oil is so expensive other sources of power such as wind, solar panels and geothermal energy become relatively cheaper. The efficiency of solar panels is expected to rise so that even in regions where sunlight is limited, these become a realistic investment.

Q:hey, Im going into my senior year at high school and after that will be moving to Pennsylvania where my family has a house on ten acres and I will be going to college there and living all year around. My father wants to build a huge barn for our cars and other stuff like tools, I mentioned too him what about solar panels on the roof to power maybe the house and barn. Would this be a good Idea? Where would be the best place to look into getting solar panels be? Thanks for anyones help!: This is a site that can help you estimate the size and number of panels that will power what you intend to provide for. There are plenty of sites selling the panels, so compare prices. Also, check whether your state is offering the rebate like the state of CA is and what the restrictions, terms and conditions are. Even with the rebates they are very costly, so be certain to calculate the pay off period for your application to see whether it is a cost efficient option for your energy usage.

Q:what direction should solar panels face to get the best exposure of the sun.: Not compass south, but solar south. It's easy to find. Google Find Solar south and you can get directions. Even better are trackers, that will let your panels track the sun all day.

Q:I have several 6v 4.5a sealed lead acid batteries. I would like to hook one of them up to a solar panel and have it stay charged from the solar panel all the time, but not overcharged. Is there a simple way to do this with an IC or something? I am only a beginner with circuits so I want it to be something very easy to make. Basically, I want it to stay charged all the time so it's available if I need it for a power out or something.Thanks.: What I would suggest is that you find a panel that is rated for 00 mA, at any voltage higher than 8 volts. A 2 or even 8-volt panel will do, because the voltage will drop to match the battery. Then I would get a diode to put in series with the panel to prevent the battery from discharging through the panel at night. That's called a blocking diode. At such low currents, a charge controller is not worth it. There is not enough power to overheat the battery, which is principally what a charge controller protects against in a larger system. Be aware that you could also simply plug a trickle charger for the battery into the wall outlet, at a cost of less than a penny a day in electricity.

Q:Can solar panels be installed on restaurants or hotels?: Yes, solar panels can be installed on restaurants or hotels. In fact, many restaurants and hotels are increasingly opting for solar panel installations as they provide a sustainable and cost-effective source of energy.

Q:Can solar panels be installed on historic buildings?: Yes, solar panels can be installed on historic buildings. However, it is important to consider the architectural integrity and preservation of the building. The installation should be done in a way that minimizes visual impact and preserves the historic character. Special considerations and regulations might apply depending on the building's status and location.

Q:How do solar panels affect the resale value of a home?: Solar panels can have a positive impact on the resale value of a home. Studies suggest that homes with solar panels tend to sell faster and at a higher price compared to similar homes without solar installations. Buyers appreciate the potential energy savings and environmental benefits associated with solar panels, making them a desirable feature in today's real estate market.

Q:How much is the cost of solar panels including installation for my home so that I can have low monthly power bills.: Home systems start at $30,000 and go up. There are federal income tax credits to help offset the cost, but you still have to pay up front, more than the average person can afford.

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