100 Watt 12 Volt Anti-Crack Flexible Monocrystalline Solar Panel

$139.95 $69.95 Save 50%
 30% Federal Tax Credit

  • High Power Output: 100W Monocrystalline Flexible Solar Panel, about 500 Watt-hours of electricity per day under 5-6 hours of direct sunlight

  • Industry-leading Tech: Improving solar conversion efficiency with transparent and matrix distributed dots
  • Portable for Mobility: Ultra-lightweight at 4.2 lbs (1.9 kg), bend up to 240 degrees, ideal for mobile applications and outdoor activities
  • Universal Compatibility: Equipped with MC4 Connector and Pre-drilled holes for fast installation
  • Premium Quality: Backed by CE, FCC, RoHS
Shipping & Returns
  • Ships within 24 hours, delivers within 2-5 days
  • Free Shipping - within 48 contiguous United States
  • Local in stock, available for self-pick-up
  • 30-Day Money Back Guarantee!
Product information

All Calpha products purchased from Calpha or their official dealers come with a limited warranty (as shown below). This limited warranty covers substantial defects in workmanship & materials and, for some products, performance.

The warranty period started from the original purchaser’s date of recipient.

Warranty Period

Product Category

Warranty Details*

Rigid Solar Panels (100W, 200W)

5 year material and workmanship warranty

5 year performance warranty (95% output warranty)

Flexible Solar Panels (100W, 200W)

2 year material and workmanship warranty

Chargers, Inverters & IoT Devices

2 year material and workmanship warranty

LiFePO4 Batteries

5 year material and workmanship warranty (prorated)**


1 year material and workmanship warranty

*Please Note: For safety, any wiring work should be performed by a licensed electrician. Failure to properly install or operate the equipment will void the warranty.

**Prorated Warranty Details:


Charge for Replacement

Within 1 Year

no extra charge

After 1 Year

extra charge = purchase price x (1 - remaining warranty period / total warranty period)

Within a valid warranty, Calpha will choose from the following two options:***

(1) repair the product at no charge, using brand new or refurbished replacement parts;
(2) exchange the product with a functionally equivalent product that is new or which has been manufactured from serviceable used parts.

All replacements will be compatible with the original products with an equal power rating. A replacement product/part assumes the remaining warranty of the original product or ninety (90) days from the date of replacement or repair, whichever provides longer coverage for you.

The transfer of property ownership is completed once a original product and its repaired product or replacement have been exchanged.The replaced product or part becomes Calpha’s property and the replacement product or part becomes your property.

*** Please Note: If a warranty claim is invalid for any reason, the purchaser will be charged for

necessary expenses incurred by Calpha (e.g. shipping, labor and material costs).

Limited to Original Purchaser

Please note that our warranty is strictly not transferable and will be invalidated by any resale or donation behavior. Accordingly, this warranty is void and disabled to any subsequent owner.

Exclusions and limitations

This limited warranty does not apply to:

1. Free merchandise;
2. Force majeure: lost or stolen items, fires, floods, earthquakes, hurricanes, severe weather, wars, and acts of terrorism;
3. Items beyond their warranty period;
4. Items that have been returned and refunded;
5. Items purchased from unauthorized resellers;
6. Items that cannot be verified to be "Calpha" products due to the lack of valid proof of purchase;
7. Qualified products without any material and workmanship defect;
8. Damage caused by operation or service of unqualified third-party;
9. Damage caused by improper installation and storage, misapplication, unauthorized repair, modifications, dis-assembly, incorrect handling and transportation not in accordance with official user manual / datasheet;
10. If our technical support team determines the product is not eligible for warranty repair or its defect is not due to our workmanship or materials, then all the costs incurred by the warranty necessary to repair, replace and transportation of the product is at your expense.

Valid Proof of Purchase

A valid order number of your purchase, either from calpha.com, or from online B2C platforms like eBay.
Order confirmation email or sales invoice that contains the description of products, price, and sales channel.

Warranty Registration

Register your warranty at our warranty registration page.

Return Material Authorization (RMA) Process

In order to initiate the repair / return process, please contact Calpha customer service and provide your warranty information.

After we confirm this is eligible for a valid warranty, we will issue a Return Material Authorization (RMA) number and provide packaging & shipping instructions on how to properly and safely ship the products back. Customers MUST package the products properly and safely and mark RMA number on the package.

After we receive and verify the returned items, we will process your return and send your repaired or replacement product to you at our expense.


After the defective products have been received at our warehouse, our team will process the delivery of replacement ASAP (generally within 15 days). Actual delivery date is subject to the availability of the replacement products.

The warranty period of the replacement is equal to the remaining warranty period of the original item or 3 months, whichever is longer.


This warranty and remedies stated above is the only officially recognized warranty regulations of Calpha, which can replace all other warranties, remedies and conditions, whether oral or written, express or implied.

No dealer, agent, employee or any other person is authorized to give any warranties which is beyond the scope of what our limited warranty sets forth.

Calpha disclaims all liability arising from any direct, consequential or incidental damages because of use or malfunction of Calpha products, or from any breach of warranty. And Calpha will not be liable for implied warranties, including, without limitations, warranties of merchantability and fitness for a particular purpose. If Calpha cannot lawfully disclaim such implied warranties, these warranties are limited in duration to the duration of this warranty.

Please note some states prohibit limitations on how long an implied warranty lasts, the warranty period may vary according to local laws and regulations. So above limitation may not apply to you. You may have other rights based on your region.

Calpha 100W 12V Anti-Crack Flexible Solar Panel

Anti-Crack Solar Cell

  • Anti-Reflective Film
    reduces reflection and enhances light absorption
  • Ultra-Pure Silicon
    ensures 23% high efficiency and optimal performance
  • Solid Copper Foundation
    4x stronger reliability than conventional cells

Impressive Flexibility

The anti-crack solar cells feature a solid copper foundation that provides exceptional durability and flexibility. They are designed to bend without sustaining damage, minimizing power losses caused by cracks and breakages. Compared to conventional cells, Calpha anti-crack solar cells deliver up to 30% more output power, enhancing the performance of solar panel systems.

Higher conversion rate

The transparent dots on the surface of our solar cells have the ability to gather sunlight from different angles. This allows for the efficient utilization of sunlight and an increase in the solar conversion rate. Additionally, the matrix distribution of these dots causes refraction, enabling the sunlight to be utilized twice within the solar cell.

Reliability for Greater Savings

Through professional laboratory bending tests, our anti-crack solar panels have demonstrated the lower degradation rates. Their reliability is nearly 4 times stronger compared to conventional panels, ensuring that your investment pays off even more.

Flexible And Portable

Calpha flexible solar panels offer an impressive flexibility of up to 240 degrees, allowing for easy and secure installation on curved roofs or RVs. Weighing only 4.9 pounds, these panels weigh 1/4 of traditional panel and are incredibly portable, making them perfect for outdoor activities like camping, hiking, and RVing.

Built to Withstand Harsh Environments

Calpha flexible solar panels are designed to withstand harsh conditions with their robust features. They are equipped with an IP68 rated junction box and connectors, providing excellent protection against water and dust intrusion. This ensures continuous performance and reliability, even in challenging environments.

Wide Applications


RV Camping

Curved Roofs

Outdoor Adventures

More Product Details

Package Includes

Calpha 100W 12V Anti-Crack Flexible Solar Panel

X 1

User Guide



Rated Power: 100W Cell Type: Monocrystalline (182mm)
No. of Cells: 32 (4 x 8) Cell Efficiency: 23%
Open Circuit Voltage: 21.1V Short Circuit Current: 6.8A
Operating Voltage: 17.6V Operating Current: 5.68A
Maximum System Voltage: 500 VDC Maximum Fuse Current: 10A
Power Tolerance: ±5% Standard Tested Condition: 1 kW/m², AM 1.5, 25°C

Model: SPF-100 Connector: MC4
Connection Cable: 2.5 mm² (AWG 13), 3 ft (0.9m) length Waterproof: IP68
Operating Temperature: -40°F to 185°F / -40°C to 85°C Dimensions: 41.3 x 21.3 x 0.1 in (1050 x 540 x 2.5 mm)
Weight: 4.2 lbs (1.9 kg) Package Dimensions: 42.5 x 21.7 x 1.2 in (1080 x 550 x 30 mm)
Gross Weight: 5.5 lbs (2.5 kg) Certifications: CE, FCC, RoHS
Material and Workmanship Warranty: 2-Year Warranty    

Customer Reviews

Based on 6 reviews
Jerry C. Jones
Working well.

My current deployment does not have the units exposed to the directly, but built quality and function seem great. While they are very light weight, due to their size and build, I do not think they would work well as portable panels that would be moved around from camp site to camp site.

Jon S. Peery
Total game changer for camping

I LOVE taking this on extended camping trips. Not the easiest to lug around because it is large and needs to be protected. BUT...it faithfully gives the power I need to operate lights, radio, and charge my phone. I love this thing!

Ben R. Delacruz

I made an error in calculating the efficiency of this unit in a previous comment. The calculations produce an efficiency of 20% not 25%.

Bobbie F. Dickison
Not as powerful as advertised

Build quality seems to be good, Ive only had it for a week so I cant comment on longevity. My issue is Im only getting at max 52-55 watts output out of this 100w panel, I have it hooked up directly to my jackery 500 it has been 90 degrees and crystal clear skies and no matter what angle it is set to it never exceeds 55 watts of charging. Im no solar expert by any means and I dont expect it to be a full 100 watts of charging but something closer to a 100 watts would be acceptable and this is half that. I know there are a lot of variables when it comes to solar and charging but I would think with how I have it set up it would be more around 80watts at least. Im not sure if its defective or its just the way it is but if youre looking to use this panel to charge your jackery or similar battery dont expect a full 100 watts of charging.

Scott G. Greenberg
Cheap and functional

For the nameplate rating its very affordable and the build feels robust but I'm yet to see current hit above 4 amps so while using the Calpha pwm charge controller I knew I wouldn't hit 100w, still skeptical an mppt would get me all the way to 100w