20W Small off Grid Solar Power System with low price

20W Small off Grid Solar Power System with low price System 1

20W Small off Grid Solar Power System with low price

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 1000 watt

Supply Capability:: 10000000 watt/month

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Product Description

Key Specifications/Special Features

Maximum power: 20Wp
Maximum power voltage (V): 18.00
Maximum power current (A): 3.89
Open circuit voltage (V): 21.60
Short circuit current (A): 4.14
Number of cells: 36
Size of module (mm): 62.5 x 62.5mm
Temperature coefficients of Isc (%): 1,000V
Temperature coefficients of Voc (%): + 0.1/°C
Temperature coefficients of Pm (%): -0.38/°C
Temperature coefficients of Im (%): -0.47/°C
Temperature coefficients of Vm (%): +0.1/°C
Temperature range: -0.38/°C
Surface maximum load capacity: -40C to +85C
Allowable hail load: 60m/s(200kg/sq.m)
Connectors and cables type: PV-0502( TUV )
Warranty: 10 years product warranty
Quantity of one 20ft container: e70%
Quantity of one 40ft HQ container: 5,000pcs
Quantity of one 40ft HQ container: 10,000pcs

20W Small off Grid Solar Power System

Product Details

Electrical Data					Module Size	Weight	Number of cells series
Nominal Power	Max-Power	Max-Power	Open-Circuit	Short-Circuit
Nominal Power	Voltage	Current	Voltage	Current
Pmax	VMPP	IMPP	VOC	ISC
W	V	A	V	A	mm	Kg	pc
10	17.2	0.58	21.6	1.31	34025417	1.2	36
20	17.2	1.16	21.6	1.93	34046025	1.8	36
30	17.2	1.74	21.6	2.57	35067030	3	36
40	17.2	2.32	21.6	3.23	45067030	3.5	36
50	17.2	2.91	21.6	3.86	55067030	4.5	36
60	17.2	3.49	21.6	3.86	60367030	5.3	36
70	17.2	4.07	21.6	4.51	75867030	6	36
80	17.2	4.65	21.6	5.17	75867030	6.5	36
90	17.2	5.23	21.6	5.81	93567030	6.7	36
100	17.2	5.8	21.6	6.46	93567030	6.7	36
110	17.2	6.4	21.6	7.08	106167035	8	36
120	17.2	6.98	21.6	7.72	116167035	8.6	36
130	17.2	7.56	21.6	8.4	127767035	9.8	36
140	17.2	4	21.6	4.4	148067035	10.9	36
150	17.2	4.17	21.6	4.58	148067035	10.9	36
160	34.4	4.65	43.2	5.17	148067035	10.9	72
170	34.4	4.94	43.2	5.49	117298335	11.7	72
180	34.4	5.23	43.2	5.81	117298335	11.7	72
190	34.4	5.52	43.2	6.14	126098335	14.6	72
200	34.4	5.81	43.2	6.5	126098335	14.6	72
210	34.4	6.1	43.2	6.85	148898335	14.6	72
220	34.4	6.4	43.2	7.08	148898335	15.2	72

Q:I can't figure out how to charge a Ni Cd (BD 8V Firestorm) battery directly with a solar panel so I've come up with an alternative which might or might not work. I thought I would connect an inverter (I found a nice 400W for $30) to my trucks battery and plug the BD Firestorm battery charger into the inverter. Then I was thinking I could use a 5W solar panel to trickle charge the truck battery and keep it connected after the Ni Cd is charged to ensure the truck battery is topped off. The truck would not be running during this process. Will this solution work? Is there a better solution?: Your 5W solar panel has to put out about 5 volts or higher to charge a 2 volt battery. 5 watts at 5 volts is only 0.3 amps, which is only enough to handle the internal leakage inside a large battery, plus a bit. If you have a 00 amp-hour battery, that panel would take 300 hours of bright sunlight to charge it. But I do agree that it will keep the truck battery charged as long as it gets sun. Make sure you put a diode in series between the panel and the battery to prevent the battery from discharging through the panel when the sun goes behind a cloud. I'd be worried that if you charged the 8 volt battery frequently, the panel would not be able to replace the lost charge, and your 2 volt battery would wind up discharged. That 8 volt battery is .2 amp-hrs (if I got the correct one). That is 27 watt-hours. Allowing for losses, you car battery will have to deliver over 30 watt hours to charge it. Your solar panel will take over 6 hours of bright sun to make up that difference. That is over 24 hours this time of year. So if you recharged it more than once every 2 days, you will lose charge in the truck battery. .

Q:Can solar panels be used on a backpack or portable device?: Yes, solar panels can be used on a backpack or portable device. These panels, often referred to as portable or foldable solar panels, can be easily attached to a backpack or other portable devices to harness sunlight and convert it into usable electricity. This allows you to charge your electronic devices while on the go, making them ideal for outdoor activities, camping trips, or situations where access to a power source is limited.

Q:Is there a material that is capable of absorbing enough UV radiation to make it worth using as a flexible solar cell?Not flexible as in aluminum, but a material such as plastic (polycarbonate).: Of Coarse! In fact flexible solar panels have already been invented. Ever hear of a solar panel shirt? Instead of the standard crystalline silicon cell these new solar panels use a flexible polymorphous silicon cell to pull in power from the sun's rays. They can be placed on clothing, cell phones, and virtually anything else.

Q:Can solar panels be installed on a museum or cultural institution?: Yes, solar panels can be installed on a museum or cultural institution. In fact, many museums and cultural institutions have embraced renewable energy and are installing solar panels to reduce their carbon footprint and energy costs. These panels can be placed on rooftops, parking lots, or even integrated into the building's architecture, providing a sustainable energy source while preserving the aesthetic appeal of the institution.

Q:I'm from Toledo, OH about 2 miles from the MI line. We are a foster family and have adopted 5 children. We just moved into a 5400+sq 2 story home. We have (3) 2.5-3 ton AC units to cool this huge house. We got the house cheap...$75k couldn't pass it up! Anyway...I was wondering how many solar panels it would take and of what wattage to power these Central Air Units and maybe the rest of the house. We have 3 people in our home......9 of which are children who leave the lights on and run hot water to beat the band. We have all brand new energy star appliances and front loader washer and dryer. Gas Range and Gas hot water tank. Was thinking of using metal window frames and buying solar cells and making my own panels. Just don't know how much to buy. We face south with no trees. Constant Sun. thanks for your help. An e-mail address to bounce questions off of would be helpful if you experienced. tx.: With your load, the largest system on the page I reference above would not power your entire house, if all the AC units are running. However, how often does that really happen? You need to look at your utility bill and find your actual amoutn of KW hours of electricity used in a year and you hav enot told us that. The base price of top system quoted here without incentives is over $70,000. As you can see, the lions share of incentives is the utility company followed by federal. I have no idea if your local utility company offers incentives or not. You would have to resolve that with them. However, the federal incentives are still there even if your state and local utility has none. However, the price to you goes way up without all of these incentives. And your idea of using windows to mount solar cells is totally impractical. Yes, I know there are web sites that advertize just that, but it is total BS. The first word of advice to anyone looking to do this sort of thing is to FIRST have a complete energy audit done and then do whatever they say to conserve as much energy as possible, thereby reducing your need for solar power. Only then should you look at using solar to cover part of your load. We are a foster family and have adopted 5 children< WOW! I would like to thank you for what you do.

Q:It measured volts before I attached it, and after attaching the voltage regulator device, the voltage dropped down to 3 volts, even when just measuring the difference in the solar panels nodes themselves, suggesting that the entire panels voltage dropped and not just the voltage in the regulator. I tried testing it with a power supply of 7 V 0. A and it works fine, but I don't know why it won't work for the solar panel.: you cannot treat the open circuit voltage of a solar panel like a voltage source (like a battery.) the load response of the panel doesn't behave that way. small panels and panels that are producing less than about .5A are very happy to have their output voltage pulled down to whatever they're connected to (typically zero.) I observed the same phenomenon when i connected a 2V 725mA panel to a 2V 325mA fan -- the open circuit voltage of 5V dropped to 3V when connected to the fan, and returned to 5V when disconnected. The easiest workaround is to use 2V of rechargable batteries in parallel with the panel so that the battery holds the 2V potential difference and the panel just supplies the current. any excess current charges the batteries, so you might consider whether or not you need some type of charge controller to prevent burning the batteries via overcharging. there are actually very few applications of solar panels connected directly to circuits that i have seen that have any kind of robust performance -- if they work at all, they eventually die/burn themselves out in a couple of months. the best robust designs always have a rechargable battery and charge controller somewhere in the power circuitry to buffer the load circuit from the panel. .

Q:if you know the area of the panel can u calculate for the wattage or voltage of the panel..: One square meter of solar panels can produce up to 50 watts of maintenance-free power for up to thirty years. The most common solar panels are for 2 V applications. For sq meter: I = P/V = 50/2 = 2.5 A A single solar cell always produces a voltage of approximately 0.5 volts, regardless of its size. For higher voltages, you have to connect individual cells in series to add their voltages. The larger the solar cell, the greater the current will be. You can also connect cells in parallel to increase current. Hope this helps!

Q:Could you throw some long scientific words in with your answer so I can impress my teacher, I'm looking to expand my scientific vocab. Thanks: Solar panels are a generic term for any type of solar collecting panel. There are two major types: Photovoltaic uses substances that turn the incoming radiation directly into electricity. Usually you have to have direct sunlight (no clouds) for this to work well. Solar thermal is also used in a lot of areas. Here the radiation is used to heat a circulating fluid (often water directly), and then that is either used directly, or it's used for heat exchange with a heat pump or a boiler system. Solar thermal can collect significant heat even on a cloudy day. So a solar panel could be made of photovoltaic panels, but it doesn't have to be.

Q:Are there any free classes to learn about solar energy and building a solar panel: You do'nt want to build a solar panel. The heart of a solar system is the Converter. From that you know that you will have 20 VAC output, but you need to know what kind of input you need prior to building your system. That way you can buy solar panels at that voltage or hook them up in series to get the voltage you need to be converted. You'll then need to calculate the power (watts) you use from day to day, that way your solar system can provide you with what you need. Problem is, NOW, you have a choice to make. If you want to just cut down on your reliance of grid power, there are companies that will do all this for you, and hook you up to the grid so that by day you will be using nothing but solar power, but at night you will be running off the grid. These companies generally make it harder on you to buy the system outright by not providing you maintenance or repair services.....so that could be an issue, which is how they keep you 'leasing' the equipment from them. OR You can go completely off the grid in which case you will have to buy back up batteries and wire them in so that they are charging during the day so that you will be running off of battery power by night.

Q:In some countries where electric generation is low, they are not available easily.: Supply and demand, my friend.

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