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VTOMAN VS400 400W foldable portable solar panel: VTOMAN VS400 400W portable solar panel unfolded on its kickstands, with the adapter cable the page says comes with it; the first image in VTOMAN's US store gallery (it carries "400W Solar Input" and "40V" badges).
Photo 1 of 1. 1 photo · Image from vtoman.com
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Manufacturer and seller images. Configuration examples may include additional equipment.

Image source: VTOMAN VS400 400W portable solar panel unfolded on its kickstands, with the adapter cable the page says comes with it; the first image in VTOMAN's US store gallery (it carries "400W Solar Input" and "40V" badges).

VTOMAN VS400 400W foldable portable solar panel

By VTOMANSold by AmazonSKU A-US-VS400

Solar panel
Evidence score2/100
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$439.99per panel$1.10 / W
$439.99 ($1.10/W) at Amazon

Paid link. As an Amazon Associate we earn from qualifying purchases. Price as of Nov 12, 2026, 9:40 AM PST, may change

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

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Rated output400 WEfficiencyNot stated$ / W$1.10W / sq ft14.5*Voltage (STC)40.32 VVmp · maximum powerVoc · open circuit48.3 VMax systemNot statedCurrent (STC)9.92 AImp · maximum powerIsc · short circuit10.41 ADimensionsW: 1,060 × H: 2,410 mmWeight15.5 kg / 34.17 lbWarrantyNot statedPower warrantyNot statedConstructionSingle-sided (unconfirmed). No bifacial claim found in the maker's documents. The site groups this module as single-sided by default; this is not a manufacturer claim.Formatportable

Key specs

Units
SKU
A-US-VS400
Official product page
Sources

VTOMAN's own US ordering SKU, printed as "sku":"A-US-VS400" for both variants ("US" and "Mexico") of the US store page's product data. The user manual prints "Product Name: VS400" and "Model No.: YT-0244". The Amazon listing was only a lead.

Official product page: VTOMAN US store product data for the same page (JSON, October 21, 2026 capture) Checked · Earlier document

Location: Store product data, variants[].sku

Documented

Rated output (STC)
400 W
Official user manual
Sources

Printed as "Peak Power: 400W" (read from the rendered page). Manufacturer claim, not an independent test.

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Peak Power

Documented

Voltage at max power (Vmp)
40.32 V
Official user manual
Sources

Printed as "Working Voltage: 40.32V" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Working Voltage

Documented

Current at max power (Imp)
9.92 A
Official user manual
Sources

Printed as "Working Current: 9.92A" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Working Current

Documented

Open-circuit voltage (Voc)
48.3 V
Official user manual
Sources

Printed as "Open Voltage: 48.3V" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Open Voltage

Documented

Short-circuit current (Isc)
10.41 A
Official user manual
Sources

Printed as "Short Circuit Current: 10.41A" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Short Circuit Current

Documented

Panel format
portable
Official user manual
Sources

The manual cover prints "Portable Solar Panel VS400" and the table prints folded and unfolded dimensions.

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 1, cover; PDF page 3, folded and unfolded dimensions

Documented

Dimensions
1,060 W × 2,410 H mm41.73 W × 94.88 H in converted
Converted: 241 cm x 106 cm x 10 mm/cm = 2410 mm x 1060 mm
Official user manual
Sources

Converted: 241 cm x 106 cm x 10 mm/cm = 2410 mm x 1060 mm

Printed as "Dimensiones desplegadas 241*106 CM" (unfolded) in the Spanish section, recorded in millimeters; the English section prints "Unfolded Dimensions: 95*41.8 Inch". No thickness is printed.

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 11, 1.Especificaciones (Spanish), Dimensiones desplegadas

Converted

Weight
15.5 kg34.2 lb converted
Official user manual
Sources

Printed as "Peso neto 15.5 KG" in the Spanish section (read from the rendered page). The English section prints "Net Weight: 34.2 lbs" (about 15.5 kg) and the store page says the panel "weighs 38 lbs"; the manual's metric figure is recorded.

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 11, 1.Especificaciones (Spanish), Peso neto

Documented

All specs10
Rated output (STC)
400 W
Official user manual
Sources

Printed as "Peak Power: 400W" (read from the rendered page). Manufacturer claim, not an independent test.

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Peak Power

Documented

Voltage at max power (Vmp)
40.32 V
Official user manual
Sources

Printed as "Working Voltage: 40.32V" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Working Voltage

Documented

Current at max power (Imp)
9.92 A
Official user manual
Sources

Printed as "Working Current: 9.92A" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Working Current

Documented

Open-circuit voltage (Voc)
48.3 V
Official user manual
Sources

Printed as "Open Voltage: 48.3V" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Open Voltage

Documented

Short-circuit current (Isc)
10.41 A
Official user manual
Sources

Printed as "Short Circuit Current: 10.41A" (read from the rendered page).

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Location: PDF page 3, 1.Specifications (English), Short Circuit Current

Documented

Published claims and calculations, not independent test results.

Documents

2 on file
  • PDF
    VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF)OfficialVTOMANOfficial user manual
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Archived copy captured on 2026-10-21.

    Location: PDF page 3 (English specifications) and PDF page 11 (Spanish specifications)

    Retrieved

    VTOMAN's own 16-page user manual for the VS400 portable solar panel (Model No. YT-0244), linked as "400W" from VTOMAN's user manual page and captured on October 21, 2026. It prints the same specification table in English (PDF page 3), German, French, Italian, Spanish and Japanese sections. The pages are images with no text layer; the tables were read from the rendered pages and the quoted strings are checked against an OCR reading. No date or revision is printed. Manufacturer claims, not independent tests.

    Archived copies

    Archived copy of a document published by VTOMAN. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

    Archived backup Revision not recorded · 10.56 MB

    Archived copy, unaltered, kept as a record of what VTOMAN published. Original address: https://cdn.shopify.com/s/files/1/0596/3507/3193/files/400W_1.pdf?v=1692844636. Copyright and takedown

    Source first found
    This copy captured
    Archived
    File detailsOriginal source
    Pages
    16
    Embedded creation date
    Embedded modification date

    Embedded dates are file metadata, not independent proof of publication.

    SHA-256: 8c4a5d72816161d95879a5368d1f7efdbca7a5f801be538ca5e3773af2077481

    Open
  • WEB
    VTOMAN 400W Foldable Portable Solar Panel, VTOMAN US store product page (October 21, 2026 capture)OfficialVTOMANOfficial product page
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Archived copy captured on 2026-10-21.

    Location: Product title; description; image gallery

    Retrieved

    VTOMAN's own US store page (vtoman.com, prices in US dollars) for the 400 W foldable panel, captured on October 21, 2026; the content is whatever the address served on that date. Marketing description and images; no revision date. Customer reviews on the page are not used. Manufacturer claims, not independent tests.

    Open

Archive and older revisions

Archive and older revisions2

Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.

  • WEB
    VTOMAN User Manual page (October 21, 2026 capture)OfficialVTOMANOfficial instruction manual
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Archived copy captured on 2026-10-21.

    Location: Solar panel manual download buttons

    Retrieved

    VTOMAN's own page listing its user manuals for download, captured on October 21, 2026; cited to show which manual VTOMAN files under each panel size ("400W", "200W" and, separately, "220W"). Not a technical source in itself.

    Open
  • WEB
    VTOMAN US store product data for the same page (JSON, October 21, 2026 capture)OfficialVTOMANOfficial product page
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Archived copy captured on 2026-10-21.

    Location: variants[].sku and variants[].title

    Retrieved

    The product data VTOMAN's US store serves for the 400 W panel page, captured on October 21, 2026; cited for the SKU and the variant names it prints. Manufacturer data, not an independent test.

    Open

Archived documents

VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF)

Archived copy of a document published by VTOMAN. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup Revision not recorded · 10.56 MB

Archived copy, unaltered, kept as a record of what VTOMAN published. Original address: https://cdn.shopify.com/s/files/1/0596/3507/3193/files/400W_1.pdf?v=1692844636. Copyright and takedown

Source first found
This copy captured
Archived
File detailsOriginal source
Pages
16
Embedded creation date
Embedded modification date

Embedded dates are file metadata, not independent proof of publication.

SHA-256: 8c4a5d72816161d95879a5368d1f7efdbca7a5f801be538ca5e3773af2077481

Submit a document

Warranty

No warranty terms on file.

Sellers

Affiliate links below. As an Amazon Associate we earn from qualifying purchases. Affiliate disclosure

Amazon

4.1 (7)not verified

Sold by VTOMAN-US

Listing SKU B0CB412KWP

$439.99Price as of Nov 12, 2026, 9:40 AM PST, may change
Visit sellerPaid link. As an Amazon Associate we earn from qualifying purchases.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

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Price history

No seller price history.

Owner reviews

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Your reviews · Review policy

Evidence score

2/1005% documented

The Evidence score uses the priorities you choose. It counts published documents, such as certificates and warranty terms, and it compares a documented figure with the best documented figure of the same kind. It does not count owner reviews, and it is not a verdict on product quality or on how many people have reviewed it. A low score can mean little is documented, or that a documented figure is below the best of its kind. Undisclosed data scores 0.

Missing for this product: Module efficiency needed; Product warranty needed; Power warranty needed; Power temperature coefficient needed; First-year degradation needed.

Each input is scored against the best documented value for a solar panel, and weight per watt against the best in the panel’s own format. A documented value always earns points; an undisclosed one earns 0 and is listed as missing. Certificates and unsupported claims do not add points.

Not documented, 0 points: Module efficiency, Product warranty, Power warranty, Power temperature coefficient, First-year degradation.

Each input is compared with the best documented value among published solar panels, weight per watt within the same panel format · Method version 0.4

How it works

Certificates

No certificates on file. Certificate guide

Parts and accessories

No sourced accessories or replacement parts listed yet.

Model history

Model identity

Model
VS400
Published model / SKU
YT-0244

Model number VTOMAN prints for the VS400 on the user manual cover and in its specification table ("Model No.: YT-0244").

Official user manual: VTOMAN user manual, Portable Solar Panel VS400, Model No. YT-0244 (PDF) Checked · Earlier document

Manufacturer SKU A-US-VS400 · US market

No historical observations recorded yet.

Community discussions

No discussions linked yet. Search DIY Solar Forum

Recalls / legal notices

No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice

VTOMANProducts, reviews and history
No reviews

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