FlexoSun400W open on legs
FlexoSun400W portable solar panel in carry bag
FlexoSun00W portable solar panel for camping folded ready to go
FlexoSun400W zig zag formation
FlexoSun 400W Portable Solar Panel | TOPCon Technology | 26% Efficiency | Teflon
FlexoSun 400W Portable Solar Panel | TOPCon Technology | 26% Efficiency | Teflon

FlexoSun 400W Portable Solar Panel | TOPCon Technology | 26% Efficiency | Teflon

R 13,999.00
R 13,999.00
Tax included. Shipping calculated at checkout.
  • In stock
  • Inventory on the way

The FlexoSun 400W is Flexopower's largest portable solar panel and the successor to the Kalahari 400W. A high-voltage (HiVolt) foldable panel built on TOPCon monocrystalline cells with ≥25.8% cell efficiency, a Teflon surface coating, IP67 protection, glass-free construction on an aluminium frame and a 5-year warranty. 400W rated output at 34.3V for extended off-grid trips, large power stations and multi-panel setups — connects via a FlexoLink extension cable to any MPPT charge controller or power station rated for its voltage. Folds to 900 × 590 × 90mm, weighs 10kg, padded carry bag included.

Panel in the sun. Camp in the shade.

Shipping & Returns
  • Shipping methods and estimated delivery dates
  • Shipping cost or free shipping info
  • Return policy summary
  • Country-specific shipping details
FlexoSun400W open on legs

FlexoSun 400W Portable Solar Panel | TOPCon Technology | 26% Efficiency | Teflon

R 13,999.00
R 13,999.00

About the FlexoSun 400W Portable Solar Panel | TOPCon Technology | 26% Efficiency | Teflon

Technical Specifications

Rated output, STC: 400W (±5% tolerance)

Cell technology: TOPCon monocrystalline — ≥25.8% cell efficiency

Surface coating: Teflon

Open circuit voltage (Voc): 38.8V (HiVolt)

Max operating voltage (Vmp): 34.3V (HiVolt)

Short circuit current (Isc): 12.5A

Operating current (Imp): 11.7A

Max system voltage: 200V DC

IP rating: IP67

Construction: Glass-free panel on an aluminium frame

Dimensions deployed: 2,360 × 900 × 25mm

Dimensions folded: 900 × 590 × 90mm

Connector: Anderson SB50 grey 50A — red/black 4mm² lead wire

Weight: 10kg

Collapsible supporting legs — angle the panel at 45° for improved harvest in winter and low sun conditions

Unique serial number — every panel individually traceable through manufacturing and QC

Warranty: 5 years

What's in the Box
  • 1 × FlexoSun 400W foldable solar panel — Anderson SB50 grey 50A connector, unique serial number
  • 1 × padded carry bag

Best Applications
  • Extended bush trips and remote camping — 5+ days off-grid with heavy daily loads (fridge/freezer, lights, cooking appliances, satellite comms)
  • Large portable power stations and lithium systems that need a fast daily recharge through an MPPT solar input
  • Overlanding and 4x4 setups with high daily energy demand
  • Caravans and trailers where maximum harvest from a single panel is required
  • Multi-panel solar arrays where one panel is not enough
  • Buyers replacing a Kalahari 300W or Kalahari 400W
  • Panel in the sun, camp in the shade strategy
Car with deployed 400W camping solar panel

How to Use It

Set up your FlexoSun 400W panel in a sunny spot and connect it via a FlexoLink extension cable to an MPPT charge controller or power station rated for the panel’s 34.3V output. Its TOPCon monocrystalline cells deliver ≥25.8% cell efficiency, with a durable Teflon surface coating and IP67 protection.

The glass-free panel is built on an aluminium frame, weighs 10kg and folds to 900 × 590 × 90mm. A padded carry bag is included, and the panel is backed by a 5-year warranty.

FlexoSun 400W Hi-Volt Design

The FlexoSun 400W is a Hi-Volt foldable portable solar panel with a rated output of 400W at 34.3Vmp. Its TOPCon monocrystalline cells have ≥25.8% cell efficiency, and the Teflon surface coating and IP67 protection are built for practical outdoor use.

Connect the panel via a FlexoLink extension cable to an MPPT charge controller or power station rated for the panel voltage. Check the receiving device’s specifications for compatibility; the 34.3V output alone does not establish its maximum input-voltage suitability.

The glass-free construction uses an aluminium frame. At 10kg, the panel folds to 900 × 590 × 90mm, and a padded carry bag is included. FlexoSun 400W is backed by a 5-year warranty.

Connecting Your FlexoSun 400W Panel

The FlexoSun 400W delivers a rated output of 400W at 34.3V. To connect it, use a FlexoLink extension cable with an MPPT charge controller or power station rated for the panel voltage.

Before connecting, check the receiving device’s specifications to confirm compatibility, including its maximum input-voltage rating. The panel’s 34.3V output by itself does not confirm that a device is suitable.

For a portable setup, the glass-free panel has an aluminium frame and folds to 900 × 590 × 90mm. It weighs 10kg, includes a padded carry bag and has a 5-year warranty.

Compatible Systems and Accessories

Sun Out. Power On.

One cable connects this panel to your entire camp setup.

FlexoLink cables available in 10m, 15m, 20m, 25m lengths. Cable thickness available as 4mm2 standard and 6mm2 low voltage drop.

Shop FlexoLink cables →See power stations →

Frequently Asked Questions

Does it need a separate charge controller?

No, when using a Flexopower power station. Its integrated MPPT handles charge management automatically. Connect the panel directly via a FlexoLink cable.

Yes, if you dont have one yet and need to charge your deep cycle battery. 

How compact is it when folded?

The Karoo230W folds to 340 × 570 × 50mm — roughly the size of a phone book. It fits behind a seat, in a drawer system or in most vehicle storage spaces.

What is shingled solar cell technology?

Shingled cells are connected in parallel groups rather than in series, making the panel significantly more resilient to partial shading. A shadow on one section does not kill the output of the entire panel. Minimised cell spacing also reduces the overall panel footprint.

What encapsulation does Flexopower use?

Teflon ETFE — specifically Neoflon from Daikin, Japan. The best available encapsulation for portable solar panels in terms of UV resistance, heat tolerance and long-term durability.

Is each panel traceable?

Yes. Every Karoo230W has a unique serial number that tracks it through the entire manufacturing and quality control process.

 

What is the warranty?

2 years on manufacturing.

How many days off-grid will it support?

The Karoo230W is rated for 5 or more days in camp depending on your power consumption and the Flexopower power station it is paired with.

Kalahari400 portable solar panel 400W
Speak to someone who knows the product.

The right setup is out there. Let us help you find it.

Not sure which system is right for you? Click the button and talk to us directly. Just a straight conversation with someone who knows the products.

Build my Set Up