Roll Up Favorites Compare 20W Round Monocrystalline Silicon Solar Panel

Roll Up Favorites Compare 20W Round Monocrystalline Silicon Solar Panel

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

Min Order Qty:: -

Supply Capability:: 10000000000000 watt/month

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Quick Details

Place of Origin:	Guangdong China (Mainland)	Brand Name:	CAP	Model Number:	50w100w150w200w250w300w
Material:	Monocrystalline Silicon	Size:	1385103575mm	Number of Cells:	72pcs
Max. Power:	300w	type:	solar panel	color:	blue&black
warranty:	5 years

Packaging & Delivery

Packaging Detail:	standard export package for solar panel
Delivery Detail:	7-15 days for solar panel

Specifications

solar panel
High Efficiency
25 years Warranty
High-transmissivity low-iron tempered glass

Solar Panel

50w100w150w200w250w300w

Characteristics

1,High and stable conversion efficienly based on over 4 years professional experience

2 ,High reliability with guaranteed +/-10% output power tolerance

3,Proven materials,tempered front glass,and a sturdy anodized aluminum frame allow modules to operate reliably in multiple mountily configurations

4,Combination of high efficicncy and attractive appearance

Quality and Safety

1,25 year 80%,10 year 90% power warranty 3 year power warranty

2,ISO9001:2000 (Quality Management system) certified factory

3,Product Quality warranty & products Liability Insurance to guarantee and user' benefits

4,Certifications TUV Intercert, CE Temperature Coefficients

Module Type	100w	150w	200w	250w	300w
Maximum Power at ST(Pmax)W	100wp	150wp	200wp	250wp	300wp
Maximum Power Voltage(Vmp)V	36/18	36/18	36/18	30.8v	36/18
Maximum Power Current(Imp)A	2.77/5.55	4.16/8.33	5.55/11.1	8.11A	8.33/16.66
Open Circuit Voltage(Voc)V	39.5/19.05	39.3/19.4	39.6/19.5	36.2V	39.6/19.8
Short Circuit Current(Isc)A	3.04/6.09	4.58/9.16	6.1/12.2	8.7A	9.16/18.33
Cell Efficiency(%)	18.60%	18.10%	18.60%	17.80%	18.10%
Module Efficiency(%)	17.70%	17.20%	17.70%	17.10%	17.20%
Operating Temperature°C	-40°C to +85°C	-40°C to +85°C	-40°C to +85°C	-40°C to +85°C	-40°C to +85°C
Maximum system voltage	1000V(IEC)DC	1000V(IEC)DC	1000V(IEC)DC	1000V(IEC)DC	1000V(IEC)DC
Power tolerance	-0.03	-0.03	-0.03	-0.03	-0.03
Temperature coefficients of Pmax	-0.45%/°C	-0.45%/°C	-0.45%/°C	-0.45%/°C	-0.45%/°C
Temperature coefficients of Voc	-0.27%/°C	-0.27%/°C	-0.27%/°C	-0.27%/°C	-0.27%/°C
Temperature coefficients of Isc	0.05%/°C	0.05%/°C	0.05%/°C	0.05%/°C	0.05%/°C
Weight(kg)	8	11	14	20	25.5
Number of cell(pcs)	4*9	4*9	6*10	6*12	6*12
Dimensions(mm)	119453435/30	158080850/35	147167040/35	164099250	2000105050

Q: What maintenance is required for solar panels?: Regular maintenance for solar panels includes cleaning the surface to remove dirt and debris, inspecting for any damage or loose connections, and monitoring the system's performance to ensure optimal efficiency.

Q: i check the diodes in the backside of solar panels it reads out to be 0.433 each give me the same result but i was amazed when i check out the last two one which on clamp meter screen give me ''0L'' what this means? is that diode have malfunctions??is this reasons that the output of solar has been decreased?: First of all, make sure that you are taking readings in the dark (with the solar panel indoors and covered). 0.433 is a reasonable forward voltage for a Schottky diode. Ideally, it diode should read open one way (possibly OL for your meter), and 0.4 the other way. If it's reading OL both ways, the diode is bad. You can either unsolder it or cut it out and verify that it is bad.

Q: In some countries where electric generation is low, they are not available easily.: Believe it or not, solar panels are so expensive in this country because of government subsides. Without market competition, companies have no obligation to compete with each other on price. If our government would stop paying people to buy solar panels and giving solar panel companies tax breaks, companies would be forced to lower their price and raise their quality in order to get you to buy their product. This would be true of oil/gas, corn, soy beans and a number of other companies and products as well.

Q: Can solar panels be installed on a condominium or apartment building?: Yes, solar panels can be installed on a condominium or apartment building.

Q: What is the impact of roof age on solar panels' efficiency?: The age of a roof can have a significant impact on the efficiency of solar panels. An older roof may have deteriorated shingles or structural issues that can affect the installation and performance of solar panels. Additionally, an older roof may require repair or replacement in the near future, which would require removing and reinstalling the solar panels, incurring additional costs and potential damage. Therefore, it is important to ensure that the roof is in good condition before installing solar panels to maximize their efficiency and longevity.

Q: Can solar panels be used in areas with high levels of electromagnetic radiation?: Yes, solar panels can be used in areas with high levels of electromagnetic radiation. While electromagnetic radiation can potentially interfere with the efficient functioning of solar panels, proper shielding and design considerations can mitigate such effects. Additionally, solar panels themselves do not emit electromagnetic radiation, making them suitable for deployment in areas with high levels of such radiation.

Q: I have 2 20 watt Solar panel. I have it hooked up to solar controller and batteries to inverter. Am trying to figure out how much watts am getting. I found the voltage but how do I find the amp reading on a mutimeter?: It is possible your meter does not have the capacity to safely measure more than 300 milliamps which is too small to measure current output from solar panels. Assuming no losses in the system or components, if your meter does not have the capacity to measure 0 Amps, you will need to get one that does. Analogs are better than digitial for this. Most often the 0 Amp circuit of the meter has a discrete positive plug location for the positive test lead. Most have a common ground connection with the rest of the meter functions. If you are measuring current at the battery in the charge mode- Negative lead of meter goes to positive terminal of battery and positive lead of meter goes to the cable that was connected to the positive terminal of the battery. Since the Wattage is a nominal measurement, if you measure between the panel and controller, take measurement on one leg of the panel, as you want to measure the current with the loaded active circuit. Meter is oriented the same way as the measurement at the battery would be made above only this time the meter is between the panel and controller. At peak solar conditions, expect current to be measured at 2.5 to3 Amps or more per panel. Under optimal conditions your panel will have higher output than their ratings indicate. Open circuit can be close to 20 volts. Never short circuit the output of the solar panels. It is volts multiplied by amps that gives you Watts.

Q: i am starting to consider getting solar panels instead of paying electric bills which are somewhat higher now than they used to be: Solar power is expensive power. The costs have been coming down but unless it's the only option or there are government subsidies, it would still be less expensive to buy electricity from the grid. The way you compare the upfront costs of solar power with monthly bills is by the Internal Rate of Return equation or the Net Present Value calculation. Vendors will use the payback periods to try and convince you into a financial decision where they reap all the benefits so you need to learn how to do a proper financial analysis. The average US household uses about 950 kwh per month, unless you are very wealthy, you will not be able to afford enough panels for that and you probably don't have enough roof space. You will have to reduce your power usage as much as possible. Batteries are expensive and inefficient. Lead acid batteries are 95% efficient at discharging but only 50% efficient at charging. A battery based system would not only include the costs of the batteries but would also double the number of panels required. Lead acid batteries have their lives rated at only 20% draws on their capacities, they lose a lot of life with each deep cycle. There are deep cycle batteries which have thicker plates but they are also rated at 20% draw and a deep cycle battery's life would drop to 94% with just one deep cycle draw. This means, it's customary to buy five times your diurnal capacity worth of batteries, fortunately this allows for several cloudy days. If you do want to have deep discharges, buy Nickel Iron batteries. You will want a grid tied system instead where you sell the power you produced to the utility and buy back what you need effectively turning the grid into a 00% efficient battery. Of course, there are costs involved as the utilities would likely charge a monthly fee just to be hooked up so this cost must be taken into account. There is also the risk that the utilities may change their net-metering arrangements on you later.

Q: want to run 400 watt heater 8 hrs a day how many solar panels do i need and batteries: You could do that, but it would be an expensive way to go. If what you really want is heat, consider heating water directly with conventional solar water heaters, and storing it in a large, insulated tank. You can then circulate the water through a conventional radiator at night.

Q: what kind of degree do i need to get in order to know everythin about installing solar panels for houses?: The only degree you will need is a degree in hard knocks.You will get it from a reliable contractor who has the skill and knowledge with the product.You may want to call the manufacture and see if there any in house schools that you could attend and be certified in their product.

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