DOKIO 400W (4×100W) Flexible Solar Panels 18V Monocrystalline for 12V Battery Charging, Semi-Flexible ETFE Lightweight with MC4, Expandable for RV Marine Camper Van Trailer Off-Grid Systems

Price: $159.99 - $126.42
(as of Feb 10, 2026 20:53:51 UTC – Details)

Product description

1 For Boat

2 For RV

1 Fast Delivery

2 low-carbon green

How can attach this to a plastic flat roof ？

Mounting Recommendation: Modules must be mounted using seal with sealant adhesive on the backside of the panel, grommets are only to be used for non-mobile applications.

Where can the solar panels be installed?

The plastic back sheet can be curved to a maximum 30 degree arc and mounted on RV, boat, cabin, tent, car, trucks, trailers or any other irregular surface.

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Customer Reviews

4.1 out of 5 stars 3,522

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3.8 out of 5 stars 159

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Price

$148.55$148.55

$65.55$65.55

$23.74$23.74

$224.79$224.79

$55.83$55.83

Maximum Power

300w

160w

Brackets

400w

100W

Dimension:

19.3*37.4*1.1in (49*95*2.8cm)

19.3*20.9*1.1in (49*53*2.8cm)

42*28.5*7cm （16.5*11.2*2.75in）

67*44*1.2inch (172*113*3cm)

38.2*22*0.98in (97*56*2.5cm)

Weight:

15.21lb(6.9kg)

7.28lb(3.3kg)

1.98lb(0.9kg)

16.5lb(7.5kg)

11.7lb(5.3kg)

Cable length 9.8ft (3m):

✓

✓

/

✓

✓

Cell Type:

Monocrystalline

Monocrystalline

/

Monocrystalline

Monocrystalline

DC 18V Output:

✓

✓

/

MC4

MC4

USB Port:

2x

2x

/

MC4

MC4

Controller 14.4V Output:

✓

✓

/

MC4

MC4

Power Current:

16.67Ah

8.89Ah

/

13.09Ah

5.56Ah

【Four Panels, Scalable Power】400W set builds larger 12V/24V systems. Connect in series or parallel depending on your controller and batteries.
【Flexible Design】Semi-flexible panels bend up to 30°, fitting curved or irregular surfaces on vans, boats, and campers.
【Safety-Focused Installation & Cooling】 Leave ventilation space so heat can escape. Do not mount directly on combustible materials (e.g., wood, asphalt shingles, fabric, foam). Avoid trapping heat or running cables beneath the panel.
【Lightweight Build】Thinner and lighter than rigid glass modules, easy to handle, mount, or remove for mobile power needs.
【Safe Use & Connection】Use with PWM/MPPT controller, avoid exceeding rating, and allow ventilation space to reduce heat and maintain output.
【ETFE Coating】ETFE top layer offers higher light transmission and weather resistance than PET. Keep surface clean for efficiency.
【Protected Packaging】Foam corners and reinforced cartons reduce shipping damage. If any issue occurs, contact us—we resolve quickly, often without returns.