1 / 6Hover to zoom · click to enlargeLensun 400W Waterproof Foldable Solar Panel
Ships from Lensun Solar's U.S. warehouse
- Shipping calculated at checkoutShown before you pay, once you enter your address.
- Authorized Lensun Solar dealerFull manufacturer warranty and support.
- 2-year warrantyWorkmanship, backed by Lensun.
- 30-day returnsOn new, unused items.
Shipping & handling
- Orders are processed within 1–3 business days.
- Parcel items typically arrive 3–7 business days after shipping. Freight items (panels, batteries, inverters and kits) typically arrive 5–14 business days after shipping.
- Rich Solar and SunGoldPower products ship free to the lower 48 states and Washington, D.C., with no minimum. Lensun shipping is based on weight and shown at checkout.
- Freight deliveries need an appointment and a signature, and are delivered curbside.
Returns & refunds
Request a return within 30 days of delivery. Items must be new, unused, not installed, and in their original packaging.
- Contact us first for a Return Merchandise Authorization (RMA). Returns sent without one are refused.
- For a change-of-mind return, you pay return shipping and a 15% restocking fee is deducted from your refund.
- Damaged on arrival? Report it within 3 business days of delivery and we arrange a replacement or full refund.
Warranty
Lensun's warranty policy covers its products with a 24-month workmanship warranty for the original buyer; Lensun repairs or replaces defective items. Lensun's FAQ rates its cells at 90% or more of nominal power after 10 years and 80% after 25 years.
Need help choosing?
Not sure this fits your system? Email support@sunenergydepot.com with what you want to power, or use the chat in the corner, and we will help you choose.
A 400W foldable panel with kickstands for power stations
Lensun's 400W (4 × 100W) foldable panel weighs 21 lb (9.55 kg), folds to 31.4 × 29.2 in and stands on built-in kickstands. Its 11-layer monolithic lamination with an ETFE surface is rated IP67 waterproof, and Lensun rates the cells at 23.7% efficiency.
The panel delivers 48V at maximum power (56.64V open circuit) through a 16 ft (5 m) MC4 cable. The included 4-in-1 adapter (DC 8 mm, DC 5.5 × 2.1 mm, Anderson and XT60) connects it to most power stations.
N-type solar cells
18BB N-type monocrystalline cells are rated at 23.7% efficiency in Lensun's specifications.
- ETFE film with high light transmittance
- ETFE resists heat, UV and corrosion, and is self-cleaning
11-layer monolithic lamination
Eleven materials are laminated into one seamless piece to withstand vibration, extreme temperatures and rough outdoor use.
- Dual aerospace-grade window film layers
- Resists UV, impact and microcracks
- IP67 waterproof
Connects to most power stations
A standard 16 ft (5 m) MC4 cable and a 4-in-1 adapter cable connect the panel to most portable power stations.
- Adapter plugs: DC 8 mm, DC 5.5 × 2.1 mm, Anderson and XT60
Kickstands and a fold-flat design
Built-in kickstands angle the panel toward the sun, which Lensun says collects up to 30% more energy than laying it flat.
- Weighs 21 lb (9.55 kg)
- Folds to 31.4 × 29.2 in (797 × 741 mm)
Specs, images and product claims on this page come from Lensun's 400W Waterproof Foldable Solar Panel page. Last checked Oct 30, 2026.
Specifications
From Lensun Solar's published specifications for model OP400W.
Electrical
| Rated power | 400W (4 × 100W) |
|---|---|
| Max power voltage | 48V |
| Max power current | 8.33A |
| Open circuit voltage | 56.64V |
| Short circuit current | 9.16A |
| Power tolerance | +5% |
Cells & build
| Cell type | Monocrystalline (18BB N-type) |
|---|---|
| Cell efficiency | 23.7% |
| Surface | ETFE film |
| Lamination | 11-layer monolithic, dual aerospace-grade window film |
| Waterproof rating | IP67 |
| Test conditions | STC: AM1.5, 1000 W/m², 25°C |
Physical
| Unfolded | 112.2 × 31.4 in (2851 × 797 mm) |
|---|---|
| Folded | 31.4 × 29.2 in (797 × 741 mm) |
| Weight | 21 lb (9.55 kg) |
| Output | 16 ft (5 m) solar cable with MC4 connectors |
| Adapter | 4-in-1: DC 8 mm, DC 5.5 × 2.1 mm, Anderson, XT60 |
| Warranty | 2-year workmanship |
| Model / SKU | OP400W |
What's in the box
Package contents as listed by Lensun Solar.
Documents & certificates
Official files from Lensun Solar.
Questions about the Lensun 400W Waterproof Foldable Solar Panel
Answers from Lensun Solar's published product information.
What warranty comes with Lensun flexible and hood panels?
Lensun covers its products with a 24-month (2-year) workmanship warranty for the original buyer. Lensun also rates its solar cells to produce at least 90% of nominal power after 10 years and 80% after 25 years.
Will it work on cloudy days?
Yes, but it produces less. Lensun says a panel under a light overcast sky may produce about half as much as in full sun.
Why does shade matter so much?
The cells in a panel are wired together, so every cell needs full sun for the panel to work at its best. If any part of the panel is shaded, the output of the whole panel drops.
Customer reviews
Reviews from Sun Energy Depot customers, collected by Judge.me.