---
product_id: 666662251
title: "MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy"
brand: "marbero"
price: "$297.46"
currency: USD
in_stock: true
reviews_count: 5
url: https://www.desertcart.us/products/666662251-marbero-21w-portable-solar-panel-foldable-solar-panel-charger-ip65
store_origin: US
region: United States of America
---

# 1.32 lbs ultra-portable foldable design 21W max power output 23% solar conversion efficiency MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy

**Brand:** marbero
**Price:** $297.46
**Availability:** ✅ In Stock

## Summary

> ☀️ Charge your adventure, no matter the weather!

## Quick Answers

- **What is this?** MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy by marbero
- **How much does it cost?** $297.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/666662251-marbero-21w-portable-solar-panel-foldable-solar-panel-charger-ip65)

## Best For

- marbero enthusiasts

## Why This Product

- Trusted marbero brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power Up Anywhere:** Compact foldable design fits effortlessly in your backpack for on-the-go energy.
- • **Sun or Shade Ready:** Delivers reliable 12W–21W power even on cloudy days—never get caught powerless.
- • **Rugged & Weatherproof:** IP65 waterproof and durable Oxford cloth construction built for all outdoor conditions.
- • **Smart & Safe Charging:** Built-in intelligent chip optimizes charging speed while protecting your devices.
- • **Universal Compatibility:** Multiple USB and DC ports charge smartphones, tablets, and more with ease.

## Overview

The MARBERO 21W Portable Solar Panel is a lightweight, foldable charger with a high 23% solar conversion rate, delivering up to 21 watts of power. Designed for outdoor enthusiasts, it features smart charging technology, IP65 waterproof durability, and versatile USB/DC outputs, ensuring reliable device charging on camping trips, hikes, or emergencies.

## Description

Specifications:Model: SL21WWattage: 21WConversion Rate: 23%Folded Size: 6.3'' x 11.4'' 1.4''Unfolded Size: 26.8'' x 11.4'' 1.4''Weight: 1.32 lbsUSB A Outputs: 5V / 2.4ADC Output: 18V / 1.1AMaterial: Monocrystalline Silicon & Waterproof FabricOpen Circuit Voltage: 21.6V ± 5%Short Circuit Current: 1.26A ± 5%Operational Voltage: 18V ± 5%Operational Current: 1.17A ± 5% Operational Temperature: -10~70℃ / 14~158℉

Review: One of them came without the part to plug into my solar battery pack. I don’t know what to do with it.
Review: I took this solar charger with me on a 6 mile trail walk to do a test on this product ….. it failed the test …. But was not completely useless ….. it was charging when it was in full sunlight but when it was shady it would quick charging ….. when the sun was strong again …. I expected the item I was charging at the time would start charging again …. Unfortunately , it did not …. Unless I unplugged the device and plugged it in again . I tried it on a solar battery generator that excepts solar charging and also my iPhone . In both instances ….. it responded the same . I found it annoying that I had to reconnect it in every time a cloud came over and stopped charging . I would not purchase one again . I had a large group with me and recorded the demonstrations on a live feed to about 16,000 members …. Trying to explain the use of solar power . Not a recommended product . 5 other products were also demonstrated and did well . This was the only one that failed . Later , I did some modifications to it and was used to run a solar fan in a shed . But was permanently taken out of Field service . It looked well made …. and it fit perfectly into my personal travel backpack . I was really disappointed when it did not perform well . It would have been my new main traveler .

## Features

- PORTABLE, FOLDABLE & EASY TO CARRY: The MARBERO portable solar panel is compact and lightweight, with a folded size of 11.4" x 6.3" x 1.3" and weighing just 1.32 lbs—smaller than an iPad Pro. It easily fits into any camping backpack or hiking daypack, or can be carried by hand, making it perfect for outdoor activities like camping, traveling, or any occasion when you need it. Designed with 4 attachment holes, this foldable solar charger can be conveniently hung anywhere using the included carabiners.
- HIGHER SOLAR CONVERSION: The 21W portable foldable solar panel is equipped with high-efficiency solar arrays, offering a conversion rate of up to 23%, turning sunlight into electrical energy for faster charging. The MARBERO 21W portable solar panel features a built-in smart chip that intelligently detects your device, maximizing charging speed while protecting it from overcharging and overloading. This ensures a more relaxed and worry-free outdoor experience without the concern of running out of power. The smart charging technology also provides optimal, 100% safe charging in direct sunlight.
- POWER IN SUN OR SHADE: This 21W portable solar panel maintains high efficiency even on cloudy days. Under full sunlight and at an optimal tilt angle (35 to 65 degrees), it generates 18W–21W of power. On cloudy or overcast days, the foldable solar panel still provides 12W–16W, ensuring reliable power for your devices in any weather.
- DURABLE & VERSATILE: The MARBERO portable foldable solar panel is crafted from high-quality, durable Oxford cloth and features IP65 waterproofing, dust resistance, and high-temperature durability. This portable solar charger is perfect for a wide range of outdoor activities, including camping, hiking, picnics, RV adventures, road trips, travel to remote areas, car trips, boating, power outages, and off-grid living. It’s an essential piece of emergency backup gear.
- WIDE COMPATIBILITY: The USB A and DC ports are built into the power box of the MARBERO 21-watt portable foldable solar panel charger, making it perfect for charging your smartphones, tablets, laptops, power bank, speaker, portable power stations, and more. This portable solar panel, designed for camping and outdoor use, offers a reliable solar panel charging solution wherever you go, whether you're using it as a camping solar panel or for general on-the-go power needs. Our portable solar charger can't store electricity and can't charge laptops and power station.
- 12 MONTHS WARRANTY: MARBERO solar panel will offer 12 months warranty and 7*24 customer service after your purchase. If you have any problem with the product, please feel free to contact us via desertcart message.
- PACKAGE INCLUDES: 1*MARBERO Foldable Solar Panel 21W, 1*DC 5521 Cable, 3*Interchangeable DC Adapters, 1*User Manual, 2*Carabiners. NOTE: Any clouds, the angle toward sunlight, operating temperature and sunlight intensity will affect the real output, we don't suggest you use this foldable solar panel inside of a window or windscreen.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CFF315PD |
| Amperage Capacity | 1.26 Amps |
| Brand | MARBERO |
| Connector Type | DC 55*21 to DC 55*21 |
| Customer Reviews | 4.2 4.2 out of 5 stars (145) |
| Efficiency | 24% |
| Folded Knife Size | 11*6 INCHES |
| Included Components | 2 Carabiners, 3 Interchangeable DC Adapters, Bag, DC 5521 Cable, User Manual |
| Item Dimensions L x W x H | 27.9L x 15.2W x 3.3H centimetres |
| Item Type Name | Oxford Nylon |
| Item Weight | 1.3 Pounds |
| Manufacturer | MARBERO |
| Material | Oxford cloth |
| Maximum Power | 21 Watts |
| Maximum Voltage | 18 Volts (DC) |
| Model Number | ET-21W |
| Part Number | ET-21W |
| Special Features | Efficient power generation in both sunny and cloudy conditions, high conversion rate, portable design, and smart charging technology |
| Upper Temperature Rating | 70 Degrees Celsius |

## Product Details

- **Brand:** MARBERO
- **Efficiency:** 24%
- **Item weight:** 1.3 Pounds
- **Material:** Oxford cloth
- **Product dimensions:** 27.9L x 15.2W x 3.3H centimetres

## Images

![MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy - Image 1](https://m.media-amazon.com/images/I/81VfqlB5DhL.jpg)
![MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy - Image 2](https://m.media-amazon.com/images/I/71HnNalsu7L.jpg)
![MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy - Image 3](https://m.media-amazon.com/images/I/81xrlK+2D-L.jpg)
![MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy - Image 4](https://m.media-amazon.com/images/I/81YFY6B+iUL.jpg)
![MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy - Image 5](https://m.media-amazon.com/images/I/91UEin-W9HL.jpg)

## Customer Reviews

### ⭐⭐⭐ Review
*by K***M on 6 January 2026*

One of them came without the part to plug into my solar battery pack. I don’t know what to do with it.

### ⭐⭐⭐ Review
*by J***R on 13 August 2024*

I took this solar charger with me on a 6 mile trail walk to do a test on this product ….. it failed the test …. But was not completely useless ….. it was charging when it was in full sunlight but when it was shady it would quick charging ….. when the sun was strong again …. I expected the item I was charging at the time would start charging again …. Unfortunately , it did not …. Unless I unplugged the device and plugged it in again . I tried it on a solar battery generator that excepts solar charging and also my iPhone . In both instances ….. it responded the same . I found it annoying that I had to reconnect it in every time a cloud came over and stopped charging . I would not purchase one again . I had a large group with me and recorded the demonstrations on a live feed to about 16,000 members …. Trying to explain the use of solar power . Not a recommended product . 5 other products were also demonstrated and did well . This was the only one that failed . Later , I did some modifications to it and was used to run a solar fan in a shed . But was permanently taken out of Field service . It looked well made …. and it fit perfectly into my personal travel backpack . I was really disappointed when it did not perform well . It would have been my new main traveler .

### ⭐⭐⭐⭐⭐ Review
*by J***C on 21 August 2025*

Extremely satisfied with my purchase. I hiked over 30 miles through the Sawtooth Mountains with this thing strapped to the back of my back using the supplied carabiners. Not a single issue. I thought it might be a single use purchase for the price point but its back home and ready to go on my next adventure too. Extremely lightweight and it did great charging phones, banks, SOS devices, and vapes for the entire team.

## Frequently Bought Together

- MARBERO 21W Portable Solar Panel Foldable Solar Panel Charger IP65 Waterproof Solar Panels 23% High Efficiency Fast Charger USB Ports & DC 18V Output for Camping Outdoor Travel Emergency Cloudy
- LifeStraw Personal Water Filter for Hiking, Camping, Travel, and Emergency Preparedness

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-09*