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Dokio Brand Panel Solar 40W Monocrystalline Silicon Solar Panel China 18V 446X660X25MM Size Solar battery China #DSP-40M

23 reviews
100% of buyers enjoyed this product! 9 orders
US $94.98
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DOKIO Basic characteristics of the product

Length 446 mm Weight 3.30 kg
Width 660 mm Main material Monocrystalline
Height 25 mm Frame material Aluminum

NOTE: MPPT Controller 12V/10A.

DOKIO Electrical characteristics


Maximum power Pmax 40Wp
Open circuit voltage Voc 21.60V
Maximum power point voltage Vmpp 18.00V
Short-circuit current I sc 2.47A
Maximum power point current I mpp 2.22A


Minor reduction in efficiency under partial load conditions at 25°C: at 100 W/m2, 95%- (+/-3%) of the STC efficiency (1000 W/m2) is achieved.


Cells per module 36 Cell dimensions 156mm x 42mm
Cell type Monocrystalline Silicon Front tempered glass (EN12150)


Maximum system voltage SC II 1000 V Maximum reverse current 16 A
Maximum system voltage USA NEC 600 V Increased snowload acc. to IEC 61215 5.4 kN/m⊃2;


NOCT 47 °C TC Voc -0.33 %/°C
TC Isc 0.042 %/°C TC Pmpp -0.45 %/°C


PTC rating 90 W Module efficiency 17.0%
Junction box IP65 DOKIO Plus-Sorting* Pflash ≥ Pmax
Connector MC4 Power tolerance* +/- 3 %

DOKIO Product Show

Operating Instruction for Solar Panel

  • Installation and operation of solar cell module
  • a). Climatic Conditions
  • Install PV module according to the following conditions
  • Ambient Temperature: -20℃ to + 40℃.
  • Operating Temperature: -20℃ to + 80℃.
  • Borne Snow Pressure: less than 2000Pa
  • Borne Wind Pressure: less than 3000Pa
  • Water proof: don’t soak the PV module in water or continuously expose it to the sprinkling device or under fountains.
  • Corrosion resistance: except for corrosive salt area and sulfurous area.
  • b). Direction
  • Module shall be installed facing south (northern hemisphere) or north (southern hemisphere).Facing east or west may send only a relatively small amount of electric energy, and incorrect installing orientation will cause a loss in energy output.
  • Series-connected PV module shall be installed in the same direction and with the same angle, because different directions and angles may cause loss of energy due to the differences of solar radiation.
  • Installation of module shall avoid under shadows. Even though the module decreases loss of energy through bypass diode, the shadow will cause loss in energy output.
  • Under normal circumstances, the module generates more current and voltage in routines than in the standardized testing conditions, therefore, please operate the configuration by multiplying 1.25 times of the short-circuit current and open-circuit voltage during the installation and application.
  • c). Installation and Precautions
  • The module must be installed on the roof with fire proof function.
  • Connector for installation and connection needs to obtain the approved certification of connector (VDE V 0126-3).
  • Junction box with the type required by the installation and connection needs to obtain the approved certification of junction box (2 PFG1162).
  • Cables with the type required by the installation and connection need to obtain the approved certification of cables (2 PFG1161).
  • When installing modules in batches, the interval distance between modules shall be larger than 100mm.
  • Firstly, place the solar cell module with certain angle (generally 30° or 45°in horizontal plane), and choose a direction that can let the sunlight directly radiate the solar cell module for more time to place the module.
  • Module and bracket shall be fully contacted with the ground.
  • When installing modules, keep away from ignition source or fuels.
  • Installation structure and bracket must bear external pressures such as wind pressure and snow pressure.
  • Installation structure shall be environment resistant and chosen appropriate materials and preservative treatment.
  • Method for high altitude installation shall be appropriate.
  • High falling may cause death, disability and damages.
  • It is forbidden to disassemble, bend, toss the module, nor shock it by hard objects or walk on it.
  • d). Wire Connection and Precautions
  • Open the junction box, connect the red wire to the positive pole (+) and the black wire to the negative pole (-) and insert the other end to the interface of the solar cell wire of the battery cabinet.
  • Fasten the module on the bracket by fastening piece and module mounting hole, the hardness and intensity of the fastening piece and module bracket must achieve the standard and be in accordance with relevant requirements.
  • Use the private joint provided by the company.
  • Note: short-circuit for positive and negative poles are forbidden.
  • The joint shall be tightened without any clearances; otherwise, the clearances may cause sparks.
  • Check if the fastening part of the installation structure is loosen; otherwise, it must be tightened.
  • Often clear the dust and dirt on the surface of the PV module with soft cloth to prevent the loss in energy output due to the block on the surface of the module. Check frequently if the surface of the module is blocked by objects.
  • Replace modules with the same specifications and the same type products.
  • Be careful not to contact the exposed part of the wire or joint, and if it is necessary, wear the insulator (such as tools, gloves, etc.).
  • During the process of installation and maintenance, be sure to cover the surface of the module with cloth or other light proof materials, because the module will generate high voltage under solar radiation which would be dangerous.​

Build your own solar system

Solar panels widely used

The use of energy-saving environmental protection of solar energy, to protect the Earth’s ecology, and create a better future.

Household solar energy systems Solar power station
Solar powered car Solar street light


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
If you received the wrong item you can request a refund or a reshipment.
If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of ElectricRCToys (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Real customer reviews

23 reviews
100% of buyers enjoyed this product!
5 stars
4 stars
3 stars
2 stars
1 star
verifed buyer
18 Apr 2018 12:47

excellent panel, match characteristics. quality is excellent. shipping courier at home.

verifed buyer
9 Apr 2018 05:51

wonderful! it within 6 days. packaging have quality. high quality made. check as допишу feedback.

verifed buyer
9 Apr 2018 02:00

whole all received and working. шла panel 6 days. in the open window 19,1 v and выдала 0,8 amp. thanks to store.

verifed buyer
5 Apr 2018 11:22

received. until parameters matching tested but, judging around, work. тяжеловата panel. but, however, at such price, not to quibble. живом machine battery maintenance-purpose in the winter. current 100 ma достаточен daytime. do not charge, but поддержит battery.

verifed buyer
31 Mar 2018 11:42

panel excellent! excellent store! honest, gregarious, responsive, adequate!!! need more when panel, order it'll!!!

verifed buyer
28 Mar 2018 09:39

very fast qualitative, thank you

verifed buyer
16 Mar 2018 08:52

fine quality solar panel, specifications may check as заявленные only voltage 21,1 volts 0,85 ампераж ампера not seen, top does as active sun is not think oh spring, summer дополню start feedback. more ехало свердловскую area in long to russia two weeks. goods store recommend!!!

verifed buyer
16 Mar 2018 07:33

долговато собиралась челябинске in transport company,-10 days fast enough and a

verifed buyer
12 Mar 2018 08:56

have two weeks. order will be more satisfied with the store

verifed buyer
1 Mar 2018 04:47

all is excellent. two заказывал panel, stacked two different slightly different items flaw second sealer, доделать to. tested both in winter, but have and relative measurement compare with current and voltage shown заявленное выдадут panel and summer in perfect order that. no back the terminals audio wire cheap piece only.

verifed buyer
15 Feb 2018 12:03

solid panel 4. касиков because of small, soldering, under checked lamp выдала, 14 v power, will sun, pro believe current, and so until all standards.

verifed buyer
15 Feb 2018 06:10

week goods come. all tested. thanks to store. order more will

verifed buyer
15 Feb 2018 02:16

received. test can not month have no. issues in overcast conditions 20 volts current. ze 0,2 a, it is 10% of rated power. about so should be. 20 days delivery.

verifed buyer
14 Feb 2018 21:32


verifed buyer
10 Feb 2018 10:54

enough to raise price. bought back 2500 month, now 3000 worth it!

verifed buyer
10 Feb 2018 07:43

panel matches the description. order will still.

verifed buyer
5 Feb 2018 10:43

look very quality goods. optional отпишусь check. thanks to store, sent fast.

verifed buyer
5 Feb 2018 03:23

within it all. quality height. packed well. inside all whole. work perfectly. to straight доставил courier.

verifed buyer
1 Feb 2018 19:06

shipping just super. i did not expect very fast. thanks to store!!!

verifed buyer
1 Feb 2018 09:01

thank you, sorry no sunshine, test can't.

verifed buyer
30 Jan 2018 09:25

highest quality! but not sun-room from verified. here we bought 10 year ago ваттную, all is excellent. very quality, recommend! especially and inexpensive-fast shipping in stock! 5 star! highest quality! operates checked but from out the sun room lamp no. ago a year, 10 here bought watt, everything is fine. very product quality, recommend i! shipping with especially from warehouse inexpensively and quickly-russia in a! 5 stars!

verifed buyer
26 Jan 2018 09:53

very fast delivery 26.01.2018 20.01.2018 courier delivered to order. packed conscience to damage not, into the characteristics of the give voltage. sun will wait)!!! to store all!

verifed buyer
25 Jan 2018 09:14

заказывал 25.01.2018 ивановскую area in received courier 19.01.2018 at home.

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