400w Foldable Solar Panel
400W Flexible Foldable Solar Panel PN-FR400B
400W foldable solar panel PN-FR400B: 8.1 kg, 40 mm folded, 18 V or 36 V. The lightest one-person array in the series. Request a quote.
Specifications
- Maximum Power (Pmax)
- 400 W
- Maximum Power Voltage (Vmp)
- 18.0 V / 36.0 V
- Maximum Power Current (Imp)
- 22.2 A / 11.1 A
- Open-circuit Voltage (Voc)
- 22.5 V / 45.0 V
- Short-circuit Current (Isc)
- 23.6 A / 11.8 A
- Unfolded Size
- 2090 × 1195 × 25 mm
- Folded Size
- 610 × 600 × 40 mm
- Weight
- 8.1 kg
The Polynet PN-FR400B is a 400W portable foldable solar panel and the lightest model in the series at 8.1 kg. It unfolds to 2090 × 1195 × 25 mm, folds to a 40 mm profile at 610 × 600 mm, and is offered in an 18 V or a 36 V configuration.
At 2.5 kg lighter than the 500W and 4.9 kg lighter than the 600W, this is the model chosen when one person has to move the array several times a day or lift it onto a rack.
Product Overview
The PN-FR400B is part of the Polynet sewn foldable solar panel series, which shares one HPBC cell platform, ETFE/PVDF encapsulation and sewn construction across the 400 W, 500 W and 600 W ratings. Polynet Solar Solutions is the solar business line of Hefei Polynet Products Co., Ltd., supplying customized solar panels and integrated solar energy solutions to B2B buyers.
Folded, the PN-FR400B measures 610 × 600 × 40 mm and weighs 8.1 kg; open, 2090 × 1195 × 25 mm. It folds along the hinge lines between laminated panel sections into a soft case for transport, and the output lead leaves the panel on the end section with the termination set by the order.
General Specifications
The folded profile is the headline figure on this model: 40 mm, against 65 mm on the 500W and 80 mm on the 600W. Both voltage builds follow in the next table.
Parameter | Value |
Maximum Power (Pmax) | 400 W |
Maximum Power Voltage (Vmp) | 18.0 V / 36.0 V |
Maximum Power Current (Imp) | 22.2 A / 11.1 A |
Open-circuit Voltage (Voc) | 22.5 V / 45.0 V |
Short-circuit Current (Isc) | 23.6 A / 11.8 A |
Unfolded Size | 2090 × 1195 × 25 mm |
Folded Size | 610 × 600 × 40 mm |
Weight | 8.1 kg |
18V or 36V: Electrical Values for Both Builds
The catalogue lists this model at 18.0 V / 36.0 V Vmp, meaning one model offered in two builds. Confirm which build, connector and cable termination you need at quotation, and keep one voltage build within a single array string.
Parameter (STC) | 18 V build | 36 V build |
Maximum Power (Pmax) | 400 W | 400 W |
Maximum Power Voltage (Vmp) | 18.0 V | 36.0 V |
Maximum Power Current (Imp) | 22.2 A | 11.1 A |
Open-circuit Voltage (Voc) | 22.5 V | 45.0 V |
Short-circuit Current (Isc) | 23.6 A | 11.8 A |
Cell Platform and Construction
Property | Value |
Cell Type | HPBC mono-crystalline |
Cell Efficiency | 26% |
Encapsulation | ETFE / PVDF |
Weight | 8.1 kg |
Folded Thickness | 40 mm |
XT60, MC4, GX16 and Anderson connectors are listed for the series, with custom specifications available. The 18 V build has 23.6 A Isc, so the array-side connector and cable should be rated at least 29.5 A (1.25 x Isc); the 36 V build has 11.8 A Isc and needs at least 14.8 A.
Where 8.1 kg and 40 mm Decide the Choice
This rating exists for handling, not for maximum output. It is the model to specify when the panel is carried by one person, stored in a thin locker, or shared between vehicles.
Situation | What the 400W rating changes |
Roof-rack and car camping | Its 40 mm folded profile and 8.1 kg weight make it the easiest of the three to lift onto a rack or slide behind a seat. |
Camper and van lockers | A 40 mm envelope fits lockers that a 65 mm or 80 mm pack cannot fit into, which is often the real constraint in a conversion. |
Rental and shared fleets | One person deploys and stows it, so units can rotate between vehicles instead of being assigned to one. |
Compact power stations | Suits a small bank or a station whose PV input would limit a larger array. Check the station's input rating before stepping up to a larger array. |
400W Against the Rest of the Series
The three ratings share one construction family; the decision usually comes down to packed envelope and daily energy budget rather than to cell technology.
Model | Folded size | Weight | Configuration | Choose it when |
PN-FR400B | 610 × 600 × 40 mm | 8.1 kg | 18 V or 36 V | one-person handling and thin lockers |
PN-FR500B | 600 × 610 × 65 mm | 10.6 kg | 18 V or 36 V | touring loads, mid-weight |
PN-FR600B | 600 × 615 × 80 mm | 13 kg | 36 V | multi-day loads, NMOT published |
Controller and Bank Sizing
On a 400W array the limiting factor is often the bank rather than the controller: a small bank reaches its acceptance current before the panel reaches its rating.
Sizing check | 400W value and what to do with it |
Configuration decision | 18 V build for a 12 V bank, 36 V build for a 24 V bank or an MPPT with a 36 V nominal PV input. Confirm at quotation; one build per string. |
PV input voltage | 36 V build: Voc 45.0 V at STC and higher in cold cells. 18 V build: Voc 22.5 V. Size the controller's maximum PV input from the cold-condition value. |
Battery-side charge current | MPPT controllers are rated on output current. Allowing about 95% conversion at 13.5 V / 27 V, 400 W gives roughly 28 A into a 12 V bank and 14 A into a 24 V bank. |
Bank match | Confirm the bank accepts about 30 A at 12 V before fitting the array, otherwise the controller will limit the panel and the extra rating buys little. |
Handling Details
On a panel this light, the handling details are the product. The folded case, the bracket and the tie-off point decide how often the array actually gets moved.
Part | What it does |
Rear bracket | Props the panel at a working angle so it does not have to lean on a vehicle. |
Rubber-wrapped handle | One-person carry of the 8.1 kg folded case. |
Hanging hole | Tie-off point for fences, racks and uneven ground. |
Zippered cable bag | Carries the lead and adapters inside the folded panel. |
B2B Supply and Customization
The PN-FR400B is designed for rental fleets, camper-van converters, outdoor equipment distributors and integrators. The two properties that matter most for one-person deployment are the 8.1 kg weight and the 40 mm folded profile, and OEM/ODM and private-label options are quoted per project.
Topic | What applies to this model |
Fleet rotation | One-person deployment lets a unit be shared across vehicles rather than permanently fitted. |
OEM / ODM and private label | PN-FR400B connector, cable length and packaging configurable; quoted per project. |
Documentation | PN-FR400B datasheet values are as published; documentation requirements are confirmed at quotation. |
Order terms | PN-FR400B carton quantity, freight data and warranty terms are confirmed at order for the build specified. |
Packing, Storage and Handling
The 40 mm folded profile is the reason this model travels well: it fits behind a seat or in a thin locker that a thicker pack will not enter. Carton contents and freight data follow the build ordered.
Item | Note |
Unit packing | Folded panel with integral handle |
Carton | Packing configuration confirmed with the quotation |
Output lead | Matched to the voltage build ordered |
Freight data | Carton quantity, gross weight and CBM confirmed with the quotation |
Technical FAQ
Why choose 400W rather than 500W or 600W?
Weight and folded thickness. At 8.1 kg and 40 mm it is 2.5 kg lighter than the 500W and 4.9 kg lighter than the 600W, and its pack is 25 mm and 40 mm thinner respectively. That decides one-person handling and locker fit; the larger models buy output, not portability.
Will 400W be enough for a fridge?
It depends on the bank and the duty cycle, not on the panel alone. Allowing about 95% conversion at 13.5 V, 400 W is roughly 28 A of charge current. Check the bank's acceptance current: if it sits below that figure, the controller will limit the panel and the extra rating buys little on short days. Send the load profile and we will check the match.
Which build, 18V or 36V?
18 V for a 12 V bank: 23.6 A Isc, so size the array side for at least 29.5 A. 36 V for a 24 V bank or an MPPT with a 36 V nominal PV input: 11.8 A Isc, so at least 14.8 A. Confirm the build at quotation; do not mix builds in one string.
What does it weigh and how thin is it folded?
8.1 kg and 40 mm folded, at 610 × 600 mm. That is the thinnest pack in the series, which is usually the binding constraint in a camper-van locker.
What about certification and warranty?
Compliance documentation requirements are confirmed with the quotation, and warranty terms follow the build. Tell us the destination market so the right standards are checked.
Request a Configuration-Specific Quote
Send the locker opening, the bank voltage and the load profile. We will confirm the 18 V or 36 V build, check that the bank can absorb about 30 A at 12 V, and quote per watt for your volume.