# GOLUMU GU-SP 30W Foldable Solar Panel Charger

Panel: The GOLUMU GU-SP is a 30W foldable solar charger with USB-A and USB-C outputs for charging devices directly in sunlight. It has no energy storage, so it cannot serve as a power bank when sunlight is unavailable.

- [Original product page](https://best-deals.pro/product/golumu-gu-sp-30w-foldable-solar-panel-charger)
- [View offer](https://best-deals.pro/visit/golumu-gu-sp-30w-foldable-solar-panel-charger)
- Market: US
- Language: en-US
- Currency: USD
- Brand: GOLUMU
- Model: GU-SP
- Price: 25.19 USD
- Previous price: 35.99 USD
- Discount: 30%
- Price checked: 2026-11-13T05:29:50.443Z

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Three folding panels and hanging holes are intended for positioning outdoors or attaching to a backpack.
- Two USB-A ports and one USB-C port are listed, with the seller recommending single-port use for peak efficiency.
- The panel supplies power directly from sunlight and has no built-in energy storage.
- The listing recommends direct, unobstructed sunlight and says partial shade reduces charging performance.

## Pros

- USB-A and USB-C outputs offer several ways to connect phones, tablets and power banks.
- Folded dimensions and listed weight support carrying it in a backpack.
- MPPT tracking and device-detection charging are claimed by the listing.

## Cons

- Without energy storage, it cannot keep charging a device after sunlight stops or store energy for later.
- Charging depends on sunlight, and the listing warns that shadows or partial shading reduce performance.

## Specifications

### Identity
- Brand: GOLUMU
- Model: GU-SP
- Maximum power: 30 watts
### Dimensions and installation
- Folded dimensions listed: 13.6"L x 7.5"W x 1"H
- Unfolded dimensions: 27.1 x 13.7 x 0.1 inch
- Panel design: 3 folding panel design
- Hanging features: 2 hanging hole feature
- Listed weight: 30 ounces \(850g\)
### Outputs and charging
- USB-A output: USB-A \(Max15W\)
- QC3.0 USB-A output: QC3.0 USB-A \(Max24W\)
- USB-C output: PD3.0 USB-C ports \(Max20W\)
- Maximum voltage: 12 volts
### Materials and protection
- Material listed: Fabric
- Solar cell and surface claims: monocrystalline cell and ETFE film
- Listed protection rating: ip67 dustproof waterproof
- Light transmission claim: up to 90%
- Energy conversion claim: up to 24%
### Charging technology
- Tracking efficiency claim: up to 99%
- Peak conversion efficiency claim: 98%

## Before you buy

- For best stated performance, orient the panel vertically toward direct sunlight and avoid obstructions. The listing advises shading the connected device in hot sun because overheating protection may stop charging.
- The listing has inconsistent panel claims: the title and several details identify a 30W charger, while feature text refers to a 45W panel. Output information also conflicts, with 12 volts listed as maximum voltage but an 18-volt output field that appears malformed. The material is listed as Fabric while the feature text describes ETFE film. Confirm the selected model's exact rating and construction. The seller also says the junction box is not completely waterproof and should be kept indoors during heavy rain, despite the IP67 claim.

## In the box

- Solar panel (Included)
- 2 Carabiners (Check selected pack): Mentioned in feature text, but not in the explicit included-components list.

## A good fit for

- Campers, hikers and backpackers who want a foldable panel for charging devices directly in clear sunlight.
- Buyers who can reposition a panel to follow direct sun and do not need stored power.

## Less suited to

- People who need reliable charging at night, in shade or when the panel is packed away.
- Buyers seeking a solar panel whose listed output rating and construction are unambiguous without checking the selected listing.

## Frequently asked questions

### Does the GOLUMU GU-SP store power for later?
No. The listing states that it converts solar energy directly and has no energy storage function.
### Can it charge multiple devices at once?
The feature text describes simultaneous charging through its USB ports, but recommends single-port use for peak efficiency. Actual charging depends on sunlight and connected devices.
### What should I know about its water protection?
The listing claims IP67 protection but also says the junction box is not completely waterproof and should be kept indoors during heavy rain.
### Is the panel's wattage consistent across the listing?
No. The title and details call it 30W, while feature text refers to a 45W panel. Confirm the rating for the selected listing.

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## Images

![GOLUMU GU-SP 30W Foldable Solar Panel Charger — 1](https://best-deals.pro/i/xNRxtfD_U-9-iyRdiWH1g1ONy9ACnAhDGeqnrFBSxm7-q3P8zcPmYRZxx4KGgdoUFKgZMRxvmv2XqE2Me0XG3f1hs7zdXpsdM6pwbgXwBfrKb5ucgykuvPso.jpg)

![GOLUMU GU-SP 30W Foldable Solar Panel Charger — 2](https://best-deals.pro/i/7IWKKYlaMY5G9Df6CI0SA0NEIVcFfmPuPcCzxh9QrD5n06goq6H7Zr8vHW9dOfqTp5UTflGNN259ec2vaNIUkDlxMZseHLtYaMasihUhfptmF9914mlBowLr.jpg)

![GOLUMU GU-SP 30W Foldable Solar Panel Charger — 3](https://best-deals.pro/i/GTL1jrpeS6chHrpfhZQTK3Q653tpRbHLvCkYzabOpf-85UHYdoczOwhlorpjbqkMv2V2Js24Ep6OkSJKV0NQ19o3UxsH2UXHrYgJJ_QIfQ56u9AKLyIrD9xJ.jpg)

![GOLUMU GU-SP 30W Foldable Solar Panel Charger — 4](https://best-deals.pro/i/VwzkzFwhby2VpBl98fcIL-BxVk6Qyer-D2fOjiFSb_dBtf5nD5wuggqzmG_PRM-Y1qZQ3EG48aAYLkisZZeT8yJQX_EbxIkdQNvUOV2m3t5iRkoyTGgA2PQo.jpg)

![GOLUMU GU-SP 30W Foldable Solar Panel Charger — 5](https://best-deals.pro/i/ZLOzzuup-BrFZarMMMSeisI5YJ3a-ejGNT8lr2ZqozTzigJZR0_OCQzhx6hflXgjUqDBZQblGXgNPcGl7ucHgNLDHAnLavIs8eo1Sd6D00FSF3UwUlqwBW6D.jpg)

![GOLUMU GU-SP 30W Foldable Solar Panel Charger — 6](https://best-deals.pro/i/geYBEM9WMrnvlbaqKDI7Um9AljN5Zng4_hW_waa7yHHaYgQfrBeF7PR8nyo3sPHZraPmC9yUWZ-jQ7aQHg0JS876Po4FWlyYABRt5kdvJ7B7mc9hwoWU1Rvo.jpg)

![GOLUMU GU-SP 30W Foldable Solar Panel Charger — 7](https://best-deals.pro/i/-soHU-XtIpXGL7A4HW04YB7cP43st1EdigNLtVUf2H-lBG4hKqug8YdnPQhrz8o_JeNAF61yk9tf0jxnLqhx78I0CZwDbUHngCeWrF115ovofPWrModV59sm.jpg)