400W Foldable Solar Panel (UC-400)
OEM Factory Solution for Portable Power Brands

The UC-400 is a high-capacity 400W foldable solar panel engineered for professional OEM and wholesale markets. Optimized for the 1000W–3000W portable power station range, it combines Grade A cell efficiency with a rugged, lightweight design (9.2kg) for stable off-grid energy.

  • EL Tested & Verified: Ensure zero micro-cracks before lamination, guaranteeing long-term power stability.
  • Up to 23% Grade A Cell Efficiency: Utilizing high-purity monocrystalline silicon for maximum power conversion in a compact form factor.
  • Premium ETFE Lamination Technology: Superior UV resistance and thermal stability compared to PET, preventing bubbling or delamination.
  • Rigid Fiberglass Backboard Structure: Enhanced mechanical strength to protect cells during frequent folding and transportation.
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400W foldable solar panel and accessories including MC4 connectors and carrying bag.
Download Full Datasheet (PDF)

Applications: High-Power Energy Solutions

High-efficiency 400W solar power set for RV and van life camping.

RV & Van Systems

Rapid-deploy charging for long-term off-grid mobile living.

A man carrying the lightweight and portable 400W foldable solar panel by the handle.

Portable & foldable

Seamless integration with 1000W–3000W solar generators.

400W foldable solar panel charging a power station at a glamping site.

Outdoor Energy

Powering camping, remote research, work sites, and events.

Key Engineering Features

Layer structure of ETFE laminated solar panel: ETFE, EVA, monocrystalline cells, and backsheet.
  • Durable Laminated Surface: Advanced vacuum lamination ensures the layers are fused properly, significantly reducing the risk of delamination in harsh outdoor environments.
  • High-Efficiency Grade A Cells: Utilizing monocrystalline silicon with 23.4% conversion efficiency for maximum power in a compact footprint.
Details of the 400W panel: adjustable kickstand, stainless grommets, and built-in cable bag.
  • Adjustable Kickstands: Includes integrated kickstands to tilt the panel directly toward the sun, increasing energy harvest by up to 23% compared to lying flat.
  • Ultra-Lightweight Build: At only 9.2 kg, the UC-400 is one of the most portable 400W panels in its class, designed for frequent handling.

Compatibility & Customization

Compatibility diagram of 400W solar panel with various portable power stations (Anderson, DC, XT60).

1. Compatibility Guide:

The UC-400 is built for maximum system integration. It comes standard with MC4 connectors for high-voltage stability.

  • Standard Connection: Plug-and-play with most professional solar controllers.
  • Custom Adapters: For OEM orders, we provide matching XT60, Anderson, or DC7909 adapter cables upon request.1.

2. OEM / ODM Capability:

  • Logo Placement: Custom branding on the fabric, handle, or backsheet.
  • Connector Solutions: Specialized cable lengths and connector types.
  • Sampling: Professional OEM samples ready in 7–15 days.

Technical Parameters (B2B Spec Datasheet)

Electrical DataValue
Peak Power (Pmax)400W
Max Power Voltage (Vmp) 40.0V
Max Power Current (Imp)10.0A
Open Circuit Voltage (Voc)48.0V
Short Circuit Current (Isc)10.8A
Mechanical DataValue
Weight9.2 kg
Folded Size665 × 570 × 75 mm
Unfolded Size3690 × 665 × 25 mm
Operating Temperature-10°C to +70°C
Cell TypeMonocrystalline (Grade A)

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Manufacturing Insight: Why Quality Varies in 400W Panels

For 400W foldable panels, structural stability is critical. A well-designed backboard and precise vacuum lamination help reduce cell stress during repeated folding, which directly affects long-term output stability.

Buyer’s Checklist:

  1. Lamination Process: We use industrial vacuum heat lamination to prevent air bubbles.
  2. Backboard Material: We prioritize rigid, lightweight backings to prevent cell micro-cracks.
  3. Real-world Output: Every UC-400 is Flash Tested and EL Tested before leaving the factory.
Technical dimensions and folding size of the UC-400 solar panel.

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Whether you are an Amazon brand owner or a regional distributor, Sola-E provides the manufacturing reliability you need for high-power solar solutions.

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UC-400W Frequently Asked Questions (B2B Sourcing Guide)

These FAQs are based on the real-world performance of 1000W–3000W portable power stations and off-grid energy systems.
Q1: What is the actual charging time for a 2000Wh power station?

A: In real-world conditions, the UC-400W typically delivers an output between 320W and 360W, depending on sunlight intensity, panel angle, and controller efficiency.

  • 1000Wh Station: Approx. 3.5 – 4 hours.
  • 2000Wh Station: Approx. 6.5 – 7.5 hours.

3000Wh Station: We recommend a dual-panel configuration for faster turnaround.

  • → Contact our team for a charging time estimate based on your specific battery capacity.
Q2: Is the UC-400W compatible with major brands like EcoFlow, Bluetti, or Jackery?

A: Yes. The UC-400W uses industry-standard MC4 connectors for maximum reliability. For high-volume OEM orders, we can pre-configure specific adapter kits (XT60, Anderson, or others) to ensure your end-users have a seamless “plug-and-play” experience.

→ Confirm your power station model with us to ensure the correct adapter configuration.

Q3: Why choose a single 400W panel instead of multiple 100W units?

A: For professional 1000W–3000W systems, efficiency and deployment speed are critical. A single UC-400W reduces cable complexity and potential points of failure (line loss). It also operates at a higher voltage (40V), which triggers the MPPT charging threshold of professional controllers earlier in the day compared to smaller panels.

→ Inquire about our bulk wholesale pricing for high-capacity 400W modules.

Q4: How does the ETFE lamination compare to standard PET materials?

A: High-power panels generate significant surface heat. ETFE (Ethylene Tetrafluoroethylene) offers superior thermal stability and light transmittance compared to PET. It prevents delamination (bubbling) and yellowing over long-term outdoor exposure, making it the preferred choice for marine and high-UV environments.

Q5: Can I connect multiple UC-400W units for 800W or 1200W output?

A: Yes, the UC-400W supports both series and parallel configurations.

  • Parallel: Increases current for 12V/24V systems.

Series: Increases voltage for high-input MPPT systems (100V-150V).

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