What this panel is: the DS flexible series is a frameless monocrystalline PERC module measuring 1660 × 990 × 1.4 mm and weighing 4.0 kg (2.4 kg/m²). It delivers 290–330 W at up to 19.8 % module efficiency, tolerates a static bending radius of 0.2 m, and is rated for −40 °C to +85 °C with an IP68 junction box and MC4-compatible connectors.

Why buyers specify this panel

Four numbers that decide whether a flexible module works in the field - not marketing claims.

4.0kg
Payload, not just freight

A 330 W glass module of the same footprint weighs 17–19 kg. At 4.0 kg this one gives you back roughly 14 kg per panel - the difference between adding a second array and reinforcing the roof. No frame also means no rail system and no through-deck fasteners.

0.2m radius
Conforms to real surfaces

Rated for a static bend radius of ≥ 0.2 m - a typical RV roof crown or yacht coachroof. It is designed for a permanent curve, not repeated flexing: a single over-bend causes micro-cracks in the cells and permanent power loss.

19.8%
Glass-panel efficiency without glass

60 six-inch mono PERC cells in a 6 × 10 layout, laminated on an MWT back-contact PCB that removes front busbars. 330 W over 1.64 m² works out to 201 W/m² - the number that matters when deck area, not budget, is the constraint.

−0.36%/°C
Heat is where flexible panels lose

Power coefficient is −0.36 %/°C. At a realistic 65 °C cell temperature on a flush-mounted roof, a 330 W panel still delivers about 283 W. Anti-PID treated laminate, IP68 junction box, 1000 V DC system rating.

Full technical specifications

Electrical data at STC and NOCT, mechanical data and operating limits. All values apply to every wattage in the series unless stated otherwise.

Electrical data at STC

Parameter	290 W	300 W	310 W	320 W	330 W
Rated maximum power (Pmax)	290 W	300 W	310 W	320 W	330 W
Open-circuit voltage (Voc)	38.4 V	38.8 V	39.2 V	39.6 V	40.0 V
Maximum power voltage (Vmp)	31.2 V	31.6 V	32.0 V	32.4 V	32.8 V
Short-circuit current (Isc)	9.50 A	9.66 A	9.82 A	9.98 A	10.14 A
Maximum power current (Imp)	9.30 A	9.50 A	9.69 A	9.88 A	10.08 A
Module efficiency	17.6 %	18.3 %	18.9 %	19.5 %	19.8 %
Power tolerance	0 / +5 W

STC: irradiance 1000 W/m², cell temperature 25 °C, AM 1.5 G.

Electrical data at NOCT

Parameter	290 W	300 W	310 W	320 W	330 W
Rated maximum power (Pmax)	216 W	224 W	232 W	240 W	248 W
Open-circuit voltage (Voc)	35.5 V	35.7 V	35.9 V	36.1 V	36.3 V
Maximum power voltage (Vmp)	28.5 V	28.9 V	29.3 V	29.7 V	30.3 V
Short-circuit current (Isc)	7.65 A	7.85 A	8.04 A	8.22 A	8.41 A
Maximum power current (Imp)	7.58 A	7.76 A	7.93 A	8.09 A	8.27 A

NOCT: irradiance 800 W/m², ambient temperature 20 °C, wind speed 1 m/s.

Mechanical data

Dimensions (L × W × H)	1660 × 990 × 1.4 mm
Weight	4.0 kg · 2.4 kg/m²
Cell configuration	60 cells (6 × 10) · monocrystalline PERC · 6 inch
Encapsulant	EVA
Front sheet	ETFE or PET - confirm specification
Backsheet options	White · transparent · black
Frame	None (frameless laminate)
Junction box	IP68
Cable	4 mm² · length made to order
Connector	MC4 compatible

Operating conditions and temperature coefficients

Maximum system voltage	1000 V DC (IEC)
Maximum series fuse rating	15 A
Operating temperature range	−40 °C to +85 °C
Static bending radius	≥ 0.20 m
Temperature coefficient of Pmax (γ)	−0.36 %/°C
Temperature coefficient of Voc (β)	−0.28 %/°C
Temperature coefficient of Isc (α)	+0.06 %/°C

Values are typical production values. A signed datasheet with the serial-number flash-test report accompanies every shipment.

Dimensions, bending and mounting

The three specification mistakes that cause field failures on flexible arrays.

Bend across the short edge, once, at design stage

At 1.4 mm the laminate will follow a 0.2 m radius, which covers most RV roof crowns and yacht coachroofs. Two rules matter: bend along the long axis so the 990 mm dimension wraps the curve, and set the arc during installation - flexible panels are not designed to be flexed repeatedly. A single bend tighter than 0.2 m cracks cells permanently, and the loss is usually invisible until you flash-test the module.

Leave an air gap - it is worth 5–8 % of output

Flush-bonded panels run 20–25 °C hotter than ventilated ones. With a −0.36 %/°C coefficient, that alone costs 7–9 % of annual yield. Raise the panel on 10–15 mm corflute or EPDM strips, or bond only along the perimeter and let the centre breathe.

Bond, don't bolt - unless the substrate needs fasteners

On fibreglass, aluminium and painted steel, marine-grade VHB tape or Sikaflex 291i along a prepared, solvent-wiped surface is sufficient and avoids every leak path. On fabric canopies and thin composite panels, use the grommet positions instead. Confirm grommet/hole pattern and pull-off test data

Electrical integration: 12 V, 24 V and string limits

The most common pre-sales question on a 330 W panel is which controller it needs. Here is the arithmetic.

Match the controller to Vmp, not to Pmax

Vmp is 32.8 V on the 330 W version. On a 24 V battery bank a PWM controller can work, but an MPPT typically recovers 25–30 % more energy because it lets the array run at 32.8 V instead of clamping it to battery voltage. On a 12 V bank PWM throws away roughly 60 % of the array - MPPT is not optional there. A 330 W panel needs a 30 A MPPT at 12 V (≈25 A) and a 15 A MPPT at 24 V (≈12 A).

Two in series on a 100 V controller. Not three.

Voc rises 0.28 %/°C as temperature falls. At −10 °C a 330 W panel reaches 43.9 V; two in series is 87.8 V, comfortably inside a 100 V MPPT limit. Three in series reaches 132 V and destroys the controller on the first cold morning. Series-connect at most two per string, fuse each string at 15 A, then parallel the strings.

Derating you should plan for

Budget 75–80 % of nameplate for real-world annual yield in a temperate climate: 248 W at NOCT, minus soiling and cable losses, plus the air-gap gain. A 330 W panel realistically returns about 1.1–1.3 kWh/day in summer at 40° latitude on a tilted surface.

Where this panel is used

RV, campervan and motorhome roofs

No drilling means no water ingress warranty claims on the vehicle. 4.0 kg per panel keeps you inside payload limits, and the 0.2 m bend follows the roof crown without a mounting frame. For a typical 12 V camper, two 330 W panels in parallel with a 40 A MPPT covers a 200 Ah lithium bank with margin.

semicoYachts, sailboats and workboats

Weight aloft and windage both matter, and a 4 kg panel mounted on a bimini or coachroof changes neither. Two marine-specific points: the connector, not the laminate, is the usual failure point - use IP67-rated MC4 mating pairs with dielectric grease - and salt mist is a separate test from IP rating. Specify IEC 61701 salt-mist certification if the array sees spray. State IEC 61701 test level if held

Off-grid, telecom and monitoring sites

Where structures are lightweight or access is difficult, 201 W/m² on a bonded surface avoids ballast and penetrations. Two panels in series suits a 24 V or 48 V MPPT input.

Light commercial and agricultural roofs

On trapezoidal metal or ageing membrane roofs with limited load capacity, adhesive mounting avoids both the rail system and the structural survey. Confirm the roof can take the wind uplift load before specifying.

Flexible vs rigid glass panel

A flexible module is not a cheaper glass module. It solves a different problem - and it loses on two metrics you should know about before you commit.

Metric	This flexible panel	Glass-framed module
Weight per m²	2.4 kg/m²	10–12 kg/m²
Thickness	1.4 mm	30–35 mm + frame
Mounting	Adhesive, no penetrations	Rails, clamps, roof penetrations
Curved surfaces	Yes, ≥ 0.2 m radius	No
Wind / snow load rating	Bonded area dependent	2400 / 5400 Pa certified
Module efficiency	17.6–19.8 %	21–23 %
Expected service life	10–15 years (fluoropolymer front sheet)	25–30 years
Cost per watt	Higher	Lower

Choose flexible when weight, curvature, or the inability to penetrate the substrate is the binding constraint. Choose glass when you have flat area, structural capacity and a 25-year horizon.

Laminate construction and materials

The front sheet determines service life more than any other component. It is the first thing a technical buyer asks about.

precautions for product use

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What the laminate is made of

60 × mono PERC cells, 6 inch, 6 × 10 layout
MWT back-contact PCB carrier - no front busbars
EVA encapsulant, vacuum-laminated
Front sheet: ETFE / PET - confirm
Backsheet: white, transparent or black

IP68 junction box, bypass diodes integrated
4 mm² cable, length to order
MC4-compatible connectors
Anti-PID treatment on cells and laminate
No frame, no glass - 1.4 mm total

Quality control and certification

Standards held, not logos displayed. Buyers and customs both check these.

IEC 61215 - design qualification and type approval cert no.
IEC 61730 - module safety qualification cert no.
IEC 61701 - salt mist corrosion test level
ISO 9001:2015 - quality management
ISO 14001:2015 - environmental management
ISO 45001:2018 - occupational health & safety
CE / UKCA declaration of conformity
TÜV NORD certification scope

What we test before packing

Every module is flash-tested and power-binned to 0/+5 W, then electroluminescence-inspected for micro-cracks after lamination - the failure mode flexible panels are most exposed to. A serial-numbered test report travels with the shipment.

Warranty

Two separate warranties. Ask for both documents - they cover different failures.

Cover	Term	Covers
Product warranty	5 years	Delamination, junction box, connectors, manufacturing defects
Performance warranty	10 years	Power output ≥ 80 % of nameplate confirm curve

Claims handled against the serial-numbered flash-test report and installation photographs. Insert your actual terms and claim process

OEM / ODM and customisation

What can be changed, and what it costs you in lead time.

Wattage within the 290–330 W window
Panel dimensions to drawing
Backsheet colour: white / transparent / black
Logo laminated into the front sheet
Logo and spec label printing

Cable length and connector type
Junction box position
Retail carton and pallet branding
Pre-drilled grommet positions
Sample orders before tooling sample policy

FAQ

Q: How much does a 330 W flexible solar panel weigh?

A: 4.0 kg, or 2.4 kg/m² on a 1.643 m² aperture. A glass-framed 330 W module of similar footprint weighs 17–19 kg, so the saving is roughly 14 kg per panel - the usual reason flexible panels are chosen for yachts, campervans and aircraft.

Q: How far can this panel bend?

A: A static bend radius of 0.2 m or greater, measured across the long axis. That covers most RV roof crowns and yacht coachroofs. It is a permanent-curve module, not a repeatedly-flexed one: a single over-bend creates permanent cell micro-cracks with no recovery.

Q: Do flexible panels need an air gap underneath?

A: They work flush-mounted, but ventilation is worth 5–8 % of yield. A 10–15 mm air gap keeps cell temperature 20–25 °C lower, and at −0.36 %/°C that translates directly into output. Bond along the perimeter and leave the centre free, or use corflute strips.

Q: How long does this panel last, and what is covered?

A: Service life is set by the front sheet. A fluoropolymer (ETFE) front sheet gives 10–15 years of outdoor service; a PET front sheet typically yellows and delaminates within 1–3 years in high-UV climates. Warranty terms differ between product and performance cover - request both documents.

Q: Can I walk on a flexible solar panel?

A: No. There is no glass and no frame; foot traffic concentrates load on single cells and causes micro-cracks. Design access routes around the array. If the roof must be walked for maintenance, leave walkway strips or specify a glass module.

Q: Will a 330 W panel charge a 12 V or 24 V battery?

A: Yes, with the right controller. Vmp is 32.8 V, so a 24 V bank works with PWM but gains 25–30 % on MPPT. A 12 V bank requires MPPT - PWM would waste about 60 % of the array. Size at 30 A for 12 V and 15 A for 24 V.

Q: How many panels can I put in series?

A: Two, on a 100 V MPPT controller. Voc is 40.0 V at STC and rises 0.28 %/°C in the cold - 43.9 V at −10 °C, so two in series reaches 87.8 V. Three in series reaches 132 V and exceeds the controller's input limit.

Q: Is it suitable for marine and salt-water use?

A: Yes, if the specification matches. Salt spray is a different failure mode from water ingress, so an IP68 junction box alone is not enough - ask for IEC 61701 salt-mist certification. Use IP67-rated MC4 mating pairs with dielectric grease: on boats, the connector fails before the laminate.

Q: How is it mounted without drilling?

A: Marine-grade VHB tape or Sikaflex 291i on a clean, solvent-wiped substrate. On fibreglass, aluminium and painted steel this holds for the life of the panel and creates no leak path. Grommet positions are available where the substrate requires mechanical fasteners.

Q: What are the MOQ, lead time and customisation options?

A: MOQ, lead time and packing quantities are listed in the section above. Custom options include wattage within the series, panel dimensions, backsheet colour, laminated logo, cable length, connector type and retail packaging. Send a drawing or target dimensions for a quotation.

Products Description

300W 310W 320W 330W Flexible Solar Panel

Ultra-Flexible Design

This flexible solar panel adopts durable polymer material, supports curved surface installation, and is ultra-thin and rollable for wide scenarios.

300W 310W 320W 330W Flexible Solar Panel

High-Efficiency Output

With monocrystalline cells up to 19.8% efficiency, it delivers stable 300W–330W power and strong heat resistance for high yield.

Easy & Reliable Use

Lightweight structure cuts installation cost greatly; IP68 junction box ensures safe, long-lasting operation in harsh environments.

Cell	Mono
No. of cells	60 (6×10)
Rated Maximum Power(Pmax)	330W
Maximum Efficiency	19.8%
Junction Box	IP68
Maximum System Voltage	1000V DC
Operating Temperature	-40℃～+85℃

Product description

This series of solar panels is featured with flexible and high power up to 320W and 300W .

Our flexible Solar Panels are made by high-efficiency solar cells onto a thin layer of extremely durable polymer material. This allows them to be thinner and lighter than our rigid solar panels while also giving them the ability to be mounted on surfaces that aren't completely flat. The flexible solar panels can be used for your RV, boat,van, yacht, sailboat, houseboat, trawler or commercial boat wtih quick install.

Key features

Flexible

Flexible polymer materials and MWT PCB packaging technology.

High efficiency

The highest efficiency of the series is up to 19.5%.

Ultra thin

The PV Module thickness is only 1.4mm.

Light weight

Weight is reduced by more than 70%.

Easy Installation

Installation cost is reduced by about 50%.

Attractive design

Specially designed grid feature, nice-looking.

Heat-Resistant

Temperature efficiency is low to -0.36%/°C. More power output in hot environment.

Anti-PID

With specific treatment, PV module passed strict PID test, no PID risk.

Key features

Dimension of PV module

Dimension

Electrical data at STC

Rated Maximum Power(Pmax) [W]	290	300	310	320	330
Open Circuit Voltage(Voc) [V]	38.4	38.8	39.2	39.6	40.0
Maximum Power Voltage(Vmp) [V]	31.2	31.6	32.0	32.4	32.8
Short Circuit Current(Isc) [A]	9.50	9.66	9.82	9.98	10.14
Maximum Power Current(Imp) [A]	9.30	9.50	9.69	9.88	10.08
Module Efficiency [%]	17.6	18.3	18.9	19.5	19.8
Power Tolerance	0~+5W
Temperature Coefficient of Isc(α_Isc)	0.06%/℃
Temperature Coefficient of Voc(β_Voc)	-0.28%/℃
Temperature Coefficient of Pmax(γ_Pmp)	-0.36%/℃
STC	Irradiance 1000W/m², cell temperature 25℃, AM1.5G

Electrical data at NOCT

Rated Maximum Power(Pmax) [W]	216	224	232	240	248
Open Circuit Voltage(Voc) [V]	35.5	35.7	35.9	36.1	36.3
Maximum Power Voltage(Vmp) [V]	28.5	28.9	29.3	29.7	30.3
Short Circuit Current(Isc) [A]	7.65	7.85	8.04	8.22	8.41
Maximum Power Current(Imp) [A]	7.58	7.76	7.93	8.09	8.27
STC	Irradiance 800W/m², ambient temperature 20℃, wind speed 1m/s

Current-voltage curves

IV curves

Mechanical data

Dimension (LxWxH)	1660mmx990mmx1.4mm
Weight	4.0 Kg
Back material	Backplane (white, transparent, black)
Cell (quantity / material / type / dimensions)	60 (10x6) / Monocrystalline PERC / 6inch
Encapsulant (material)	EVA
Frame	None
Junction box (protection degree)	IP68
Cable (length / cross section area)	Customized by customer / 4mm2
Connector	MC4 compatible

Certification

✓ ISO 9001: 2005 Quality Management System

✓ ISO 14001: 2014 Environment Management System

✓ QHSAS 18001: 2007 Occupation Health Safety Management System

✓ TUV NORD Certification

Operating conditions

Max. system voltage	DC 1000V (IEC)
Max. series fuse rating	15A
Operating temperature range	-40℃～+85℃
Bending radius	≥ 0.20m

Certificate

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