● Grade A solar cell, 12BB, 25.2% conversion.
● Aluminum frame, strong and durable.
● 10-15% more energy, capturing sunlight on both sides and generating electricity on both sides.
● Reserved mounting holes, easy to install.
● Saves energy even in partial shade.
25.2% High Conversion Efficiency
High conversion efficiency solar panels continue to deliver better performance and adapt to a wider range of climate conditions.
Dual-Sided Solar Panels
Maximize solar efficiency and save more on your energy bills
Upgraded 12BB Solar Panel
The upgraded 12BB design performs better in low-light conditions, ensuring steady energy production even during cloudy or overcast days.
Product Size
Built for Excellence, Designed for the Future
Werchtay uses top-quality materials to manufacture our solar panels, rigorously tested to ensure optimal performance in all conditions, meeting long-term durability requirements.
25-Year Warranty
Long-term protection, reliability you can count on, and peace of mind for your solar investment.
100W Bifacial Solar Panel Specifications
Electrical Characteristics (STC: 1000W/㎡, 25℃, AM1.5)
Maximum Power (Pmax):
100W
Open Circuit Voltage (Voc):
24.62V
Short Circuit Current (Isc):
5.36A
Voltage at Pmax (Vmp):
20.52V
Current at Pmax (Imp):
4.87A
Module Efficiency:
21.5%
Power Tolerance:
(0, +4.99W)
Maximum System Voltage:
1000V
Maximum Series Fuse Rating:
20A
Temperature Characteristics
Pmax Temperature Coefficient:
-0.40%/°C
Voc Temperature Coefficient:
-0.32%/°C
Isc Temperature Coefficient:
+0.05%/°C
Operating Temperature:
-40～+85℃
Nominal Operating Cell Temperature (NOCT):
45±2℃
Mechanical Specifications
Dimensions:
1010 × 460 × 30 mm
Weight:
4.9 kg
Solar Cells:
Monocrystalline 210×52.5mm (36 pcs)
Front Glass:
3.2mm Tempered Glass, Low Iron
Frame:
Anodized Aluminum Alloy
Junction Box:
IP67 Rated
Mechanical Load:
5400 Pa
Output Cables:
4.0mm² × 900mm
Connector:
MC4 Compatible
Warranty
Product Warranty:
5 Years
Frequently Asked Questions
What does “bifacial” mean and why does it matter?
A bifacial solar panel is designed to capture sunlight on both the front and the back sides, thereby increasing energy generation compared to standard monofacial panels. This means when properly installed (with reflective surface or elevated mount), you can gain additional output from the rear side of the module.
How much power can I expect from a 100 W bifacial panel in real-world use?
Under ideal conditions (full sun, optimal angle, reflective surface underneath), a 100 W rating means you might produce roughly 100 W at peak. In real daily conditions (say 5 hours of peak sun) you could see ~0.5 kWh or more, depending on site, tilt, temperature, and rear-side reflection. For bifacial panels, the actual output gain depends heavily on installation conditions.
Is this panel suitable for RVs, boats, off-grid cabins and mobile use?
Yes. The 100 W size makes it flexible for smaller systems like RVs, marine vessels, tiny homes or off-grid cabins. Because it's bifacial, you also benefit if you can mount it so the backside sees some reflected light (for example on a light ground surface or raised structure).
What system voltage options are supported and how should I connect this 100 W panel?
Typically the panel is rated for a 12 V nominal system (or optionally 24 V depending on version). You should connect it to an MPPT charge controller properly sized for the voltage and current. If you plan to use multiple such panels, ensure you parallel or series correctly depending on your battery bank and controller specs.
What about compatibility with existing systems (batteries, controllers, inverters)?
The panel uses standard MC4 connectors (or equivalent) and can be integrated into off-grid systems or those paired with batteries/inverters. Just ensure the panel’s voltage and current output are matched to your controller and battery bank. If using the bifacial advantage, ensure mounting and wiring reflect the expected higher yield properly.
How does performance vary in non-ideal conditions (cloudy, low sun, shaded)?
While this 100 W panel will still generate power in less than ideal conditions (diffuse light, partial cloud), output will be lower than peak. Because it’s bifacial, rear-side capture may slightly improve performance in diffuse/reflected light conditions—but the gain is dependent on installation.
Is this panel cost-effective compared to a standard monofacial 100 W panel?
Yes — especially if you can make use of the rear-side energy by mounting it to exploit reflected light. Bifacial technology can produce more energy in the same footprint, boosting yield and reducing pay-back time. However, if the rear side is completely blocked (e.g., flush roof mount with no reflection), the added cost may not justify the benefit.
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