Portland Solar Panels - Factory Direct Sale:A-Grade High Efficiency 250W Poly Solar Panels
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 5000 watt
- Supply Capability:
- 40000000 watt/month
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Current
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
| Dimension | 1638x982x35 |
| Weight | 18kg |
| No. of Cells and Connections | 60(6x10) |
| Tolerance | 0~+5W |
| Cell | Polycrystalline Cell |
| Packing | 812 Pcs/40ft(H) Container |
Limits
| Opening Temperature | -40℃ to +85℃ |
| Storage Temperature | -40℃ to +85℃ |
| Max System Voltage | 1000VDC(IEC)/ 600VDC(UL) |
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
- Q: Can solar panels be used during a power outage?
- No, solar panels cannot be used during a power outage unless they are connected to a battery storage system. Without a battery backup, solar panels will also lose power when the grid goes down.
- Q: I'm trying to charge rechargeable AA batteries with a solar panel. What guage wire should I use to connect the panel to the batteries? Should I use a diode to keep the batteries from overpowering the circuit? If so, what size? My panel is 4.8V 50mA.
- You not only need a diode, but a circuit that opens the circuit if the voltage falls below a certain level. The diode is not the problem, but the batteries powering the solar panel when the voltage falls to low.
- Q: Can solar panels be leased or financed?
- Yes, solar panels can be leased or financed. Many solar companies offer leasing options where the panels are installed on your property and you pay a monthly fee for their use. Alternatively, solar panels can also be financed through loans or financing programs, allowing you to purchase and own them over time while making affordable monthly payments.
- Q: Pretty much, can solar panel's support the entire houses electrical needs generally, because I know sometimes the owner's can sell unused electricity back, any ideas or any ideas on how much the average home uses in kWh
- Solar okorder
- Q: I was hearing that we need silver as a medal for the creation of solar panels, is this true? How much silver would be needed to make one solar panel? (if this is true)
- Some research has shown that small amounts of silver can improve the efficiency of solar panels. But this appears to be in the research stage and applies to the the thin film solar cells. Some solar panels makes use silver as the wiring in kind of a screen printing process, but you don't need to use silver, you can use copper or aluminum using different techniques instead. Generally the metal used is in small amounts and not a majority of the cost of the solar panel.
- Q: Say if i had a 2KW system is thtat just one big solar panel or does the whole system have little solarpanels together.?
- Solar panels are arrays of individual solar cells connected in series and parallel, and.. A high quality, monocrystalline silicon solar cell, at 25 °C cell temperature, may produce 0.60 volts open-circuit (Voc). The cell temperature in full sunlight, even with 25 °C air temperature, will probably be close to 45 °C, reducing the open-circuit voltage to 0.55 volts per cell. The voltage drops modestly, with this type of cell, until the short-circuit current is approached (Isc).
- Q: Can solar panels be installed on a carport?
- Yes, solar panels can be installed on a carport. In fact, carports are an ideal location for solar panel installation as they provide ample space, unobstructed sunlight, and can also serve as a shade provider for parked cars.
- Q: can you buy single solar panels say to power a washing machine fridge etc.if so where can i buy them from
- Yeah, just find out how much electricity your fridge or washing machine uses, (look on the internet), and buy solar panels for just that amount of energy. Solar panels can power from watt to 224 watts! ~MaDiSoN
- Q: why don't we take a cue from mother nature and make our soar panels like trees? thousands of leaves or needle (like a pine tree) instead of one big flat panel? I mean it seems to work pretty good for all the plants i see why would it not work for us. It would be aesthetically pleasing and with the right engineering wouldn't it make them not have to worry about tracking the sun? i already have some ideas about the process of making them just no available labratory.
- Because we and the trees are trying to solve a different problem. We want electricity, a tree wants light (and some heat) for photosynthesis. In getting the electricity we use Silicon for solar panels. (Sometimes Gallium Arsenide). And we exploit the same thing in Silicon that allows them to be computer chips. The fact that they conduct differently when voltage is applied. But for a solar panel that is done essentially in reverse. We GET a voltage difference (electricity) from shoving energy through it. Look up junction bias on google or yahoo for explanation. But the DESIGN problem is: You have to couple these panels together the right way - according to their bias. You can't string them up willy nilly. There is a pattern. And when one breaks in this pattern. (I mean when the actual panel cracks, which they do easily as they are brittle). It can change the overall bias. This can make even be worse than if it was removed, it can actually fight against the working ones. The efficiency is there in arranging them like a tree, but the practicality of maintenance would be daunting.
- Q: Can solar panels be installed on a pergola or awning?
- Yes, solar panels can be installed on a pergola or awning. In fact, they can be a great option for maximizing solar energy production while providing shade and protection from the elements.
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Portland Solar Panels - Factory Direct Sale:A-Grade High Efficiency 250W Poly Solar Panels
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 5000 watt
- Supply Capability:
- 40000000 watt/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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