Sienna Solar > Products > 200 Watt Solar Panels > Solar Panel 400 Watt 12 Volt, 2 Pack of 200W Monocrystalline PV Module Power Charger for RV Marine Rooftop Battery and Other Off-Grid Applications
Shop
Solar Panel 400 Watt 12 Volt, 2 Pack of 200W Monocrystalline PV Module Power Charger for RV Marine Rooftop Battery and Other Off-Grid Applications
[HIGH EFFICIENCY] WERCHTAY 400 watt solar panel is made of 9BB 166mm high quality A-grade cells. The conversion rate is as high as 22.8%, compared with 5BB solar panel, it has higher conversion efficiency and longer service life.
[EFFICIENT PERFORMANCE] Bypass diodes of this panel solar protect the solar cells from overheating and allow the solar panel to continue working during accidental shading by bypassing the underperforming cells. WERCHTAY 400w solar panel is very suitable for charging 12 volt batteries. Multiple panels can be connected to 24 / 48 volt batteries in series.
[SAFETY] 12v monocrystalline solar panel can withstand high winds (2400pa) and snow loads (5400pa). The outdoor solar panel is ROHS, CE, EL certified. It can help your device receive the most effective sunlight safely.
[BUILT to LAST] Corrosion-resistant aluminum frame of this 400 watt solar panel 12v provides extended outdoor use that ensures the panel can last for decades. Both the IP67 junction box and IP67 MC-4 connectors have excellent waterproof function. Allows you to use it outdoors with confidence.
[EASY to INSTALL] The solar panels 400 watt has a built-in MC-4 connector, which can easily insert and pull out the solar controller. The pre-drilled hole on the back of the panel helps install it in your vehicle, RV or other place you need it. Each of our solar panels is tested and inspected before leaving the factory to ensure flawlessness. If you have any questions, please feel free to contact us.
[What You Get] WERCHTAY 400W 9bb solar panels come with a 24-month product warranty and a 25-year power guarantee. In addition, once you choose a WERCHTAY solar panel, you will receive our lifetime customer service. If you have any questions or problems with WERCHTAY 400w 9bb solar panel, please feel free to contact us. We will provide you with professional guidance to help you set up your solar system.
Additional information
Brand
WERCHTAY
Material
Monocrystalline Silicon
Item Dimensions LxWxH
55.51 x 27.56 x 1.18 inches
Efficiency
High Efficiency
Included Components
Solar panel
Maximum Voltage
12 Volts
Maximum Power
400 Watts
Manufacturer
WERCHTAY
Part Number
WERCHTAY-400w
Item Weight
23 pounds
Product Dimensions
55.51 x 27.56 x 1.18 inches
Country of Origin
China
Item model number
WERCHTAY-400w
color
400w Solar Panel(2pcs set)
Power Source
Battery Powered
Voltage
18 Volts (DC)
8 reviews for Solar Panel 400 Watt 12 Volt, 2 Pack of 200W Monocrystalline PV Module Power Charger for RV Marine Rooftop Battery and Other Off-Grid Applications
Rated 5 out of 5
Dutchie in the Bay Area –
Fast delivery, packaged very well, a little smaller than older panels, voltage output as claimed or better. Happy customer. Thanks.
Rated 5 out of 5
Dutchie in the Bay Area –
Tested to specs, these panels were purchased as Like New, apparently a return from a township installation in jersey. Panels were in perfect condition, and Met the specifications on the back label. Also I tested against ebay 100w panels which I doubt are even 10, the eBay could not directly power a 12v water pump motor, which these could handle with ease, not even in direct sunlight, they will work perfectly to keep my boat lift recharging. Teamed both panels with a separate MPPT controller each for redundancy and ease of panel replacement in the event of damage.
Rated 5 out of 5
AmazonCustomerUSA –
Use as add on series panels with another brand and see no difference. They seem to preform well. I have no problems.
Rated 5 out of 5
Bill Burton –
Nice panels. The panels come with 4 pre-drilled holes in the bottom for mounting. I added two in front and two in back, since I expect the conditions to be a big more rough. Seems to produce desired energy.
Rated 4 out of 5
Steven Layne –
With 10 bus configuration, this definitely puts out a lot of power up front with an open circuit voltage of twenty four volts In direct late morning sun @ 5 amps closed circuit clampmeter reading, The higher open circuit voltage will be problematic plugging directly into one of these all-in-one lithium Solar generators, which are made for 18 to 19 Volt max oc solar blanket input, and thus may give error, reject anything in 22 to 24v input range. That said anybody complaining about output, needs to do a proper closed circuit measurement with DC clamp meter, Otherwise, with a normal d c m multi meter using leads, youll need to have a load that can draw 5 to 6 amps, running your leads in series to get accurate reading. I’m giving it 4 stars due to a dent in the back of the panel frame and the poor packaging and minor detail such as way leads are sloppily soldered in junction box, and data sticker slapped on crookedly, indicating rushed cheap manufacturing process fueling doubt about longevity. Otherwise good power great size, competitive price.
Rated 3 out of 5
Thomas E. Palmer –
One of two photovoltaic panels was inoperative. A solder tab in the connection box wasn’t made. I repaired it free of charge.
Rated 5 out of 5
Aaron Gorius –
I mounted them to the top of my truck that’s right to power my portable air condition system I even did a review on that one already I have three of these solar panels from the same company on the roof of my truck and they provide an excellent power source and very happy with my selection
Rated 5 out of 5
Steven Layne –
I bought this flex panel and a similar-priced competitor to do side-by-side testing. Before buying the 10 panels I need, I wanted to see which ones worked best.
I had 2 panels side-by-side facing the sun, and alternately connected one then the other to the Intelligent MPPT controller I bought. This Werchtay panel output 90W, while the other panel only output 40W. So I returned the other one, and will be buying 9 more of these!
Dutchie in the Bay Area –
Fast delivery, packaged very well, a little smaller than older panels, voltage output as claimed or better. Happy customer. Thanks.
Dutchie in the Bay Area –
Tested to specs, these panels were purchased as Like New, apparently a return from a township installation in jersey. Panels were in perfect condition, and Met the specifications on the back label. Also I tested against ebay 100w panels which I doubt are even 10, the eBay could not directly power a 12v water pump motor, which these could handle with ease, not even in direct sunlight, they will work perfectly to keep my boat lift recharging. Teamed both panels with a separate MPPT controller each for redundancy and ease of panel replacement in the event of damage.
AmazonCustomerUSA –
Use as add on series panels with another brand and see no difference. They seem to preform well. I have no problems.
Bill Burton –
Nice panels. The panels come with 4 pre-drilled holes in the bottom for mounting. I added two in front and two in back, since I expect the conditions to be a big more rough.
Seems to produce desired energy.
Steven Layne –
With 10 bus configuration, this definitely puts out a lot of power up front with an open circuit voltage of twenty four volts In direct late morning sun @ 5 amps closed circuit clampmeter reading, The higher open circuit voltage will be problematic plugging directly into one of these all-in-one lithium
Solar generators, which are made for 18 to 19 Volt max oc solar blanket input, and thus may give error, reject anything in 22 to 24v input range. That said anybody complaining about output, needs to do a proper closed circuit measurement with DC clamp meter, Otherwise, with a normal d c m multi meter using leads, youll need to have a load that can draw 5 to 6 amps, running your leads in series to get accurate reading. I’m giving it 4 stars due to a dent in the back of the panel frame and the poor packaging and minor detail such as way leads are sloppily soldered in junction box, and data sticker slapped on crookedly, indicating rushed cheap manufacturing process fueling doubt about longevity. Otherwise good power great size, competitive price.
Thomas E. Palmer –
One of two photovoltaic panels was inoperative.
A solder tab in the connection box wasn’t made.
I repaired it free of charge.
Aaron Gorius –
I mounted them to the top of my truck that’s right to power my portable air condition system I even did a review on that one already I have three of these solar panels from the same company on the roof of my truck and they provide an excellent power source and very happy with my selection
Steven Layne –
I bought this flex panel and a similar-priced competitor to do side-by-side testing. Before buying the 10 panels I need, I wanted to see which ones worked best.
I had 2 panels side-by-side facing the sun, and alternately connected one then the other to the Intelligent
MPPT controller I bought. This Werchtay panel output 90W, while the other panel only output 40W. So I returned the other one, and will be buying 9 more of these!