300W Foldable Solar Panel - Monocrystalline 18V Portable Kit for Camping, Boat and Car
300W Foldable Solar Panel - Monocrystalline 18V Portable Kit for Camping, Boat and Car
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300 W of portable power that folds into a carry case
Four monocrystalline panels joined into a single foldable unit, sized to recharge a power station, a 12 V leisure battery or a car battery away from the grid. Unfolded it delivers up to 300 W at 18 V; folded it stores flat behind a seat. It suits camping, overlanding, boats, field work and emergency backup where a roof-mounted array is not an option.
Technical specifications
| Maximum power (Pmax) | 300 W |
|---|---|
| Maximum power voltage (Vmpp) | 18 V |
| Maximum power current (Impp) | 16.68 A |
| Open-circuit voltage (Voc) | 22.5 V |
| Short-circuit current (Isc) | 16.92 A |
| Cells | 4 x 36 monocrystalline |
| Panel size | 1000 x 500 x 30 mm folded |
| Waterproof | Yes, panel surface |
| Certification | CE, TUV, ISO |
| In the box | Panel, 3 m cable, charge controller, user manual |
What 300 W realistically charges
In strong sun a 300 W foldable panel returns around 1.2-1.5 kWh per day; in overcast conditions or in winter, expect a third of that. Practical results:
- A 500-1000 Wh power station recharged in a single good day
- A 100 Ah lead-acid leisure battery brought from 50% to full in about half a day
- Laptops, drones, camera batteries and starlink-class terminals run continuously in daylight
Getting the most from a portable panel
Angle matters more than anything else. With the kickstand set toward the sun the panel produces roughly 25% more than lying flat, and repositioning it twice during the day adds more energy than buying a larger panel. Keep the junction box dry, keep the surface clean and avoid partial shade across the cells, which cuts output disproportionately.
Buying from 54 Energy
- Sold and supported by 54 Energy
- 1-year warranty on every unit
- Worldwide delivery in 5 to 15 business days
- Secure payment via Stripe: credit card, debit card and Apple Pay
- Transparent pricing, no quotation process
Frequently asked questions
Can it charge a portable power station directly?
Yes, if the station accepts 18-22 V DC input within the current limit. Check the station input specification and use the matching DC connector.
Is a controller included?
Yes. A charge controller and a 3 m cable ship with the panel for direct 12 V battery charging.
Can it charge a car battery?
Yes, with the supplied controller and alligator clips. Never connect the panel to a battery without a controller.
Is it waterproof?
The panel surface withstands rain. The junction box and controller should be kept dry and out of standing water.
How heavy is it?
The folded unit stays portable for one person to carry and set up, and packs flat for storage in a vehicle.
Can I connect two panels?
Yes, in parallel with a branch connector for more current, provided your controller handles the combined current.
What is the delivery time?
5 to 15 business days worldwide.
