About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out any material, long-term or laboratory tests. The tests are carried out by 1-2 independent consumers over a period of 7-14 days. The exact test conditions can be viewed in the test plan of the respective test report – click here to go directly to the test plan.

Manufacturers provide the tested products free of charge. We charge a one-off test fee for carrying out the tests. In addition, manufacturers pay an annual licence fee for the use of the Prüfengel seal. We also receive a commission for linking to manufacturers’ websites. These remunerations have no influence on our test results or ratings.

We guarantee transparency and a fair evaluation. For a detailed insight into our comprehensive evaluation process, please click here.

Sunnybag
LEAF MINI

Product description of the manufacturer

The Sunnybag LEAF MINI is an ultra-light, portable solar panel that is particularly suitable for outdoor activities such as hiking, camping and cycling. With five watts of power and 100% certified SUNPOWER solar cells, it promises high energy efficiency and a compact design. Thanks to its waterproof and scratch-resistant ETFE surface and sturdy fastening eyelets, it is said to be ideal for attaching to rucksacks or tents. The panel is ideal for environmentally conscious adventurers who do not want to do without electricity when they are on the move. Thanks to its compact size, it can be stowed almost anywhere and still provides a power source for smaller devices. It is a practical addition to your equipment, especially for long hikes or bike tours.

  • Ultralight design with only 158 grams
  • High-quality, certified solar cells with 22.4 % efficiency
  • Waterproof and robust against knocks and scratches
  • Simple fastening options thanks to eyelets
  • Maximum performance can only be achieved under optimum conditions

The first impression

Packaging and contents

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

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Product protection

Carton is sturdy, product sufficiently protected

100

Points

Sustainability Packaging

No unnecessary packaging waste, no plastic film

100

Points

Package contents & scope

Complete

100

Points

Instructions for use

Product is self-explanatory, instructions for use on the back of the box including QR code

100

Points

TOTAL

100

Points

Weighting: 20%
*Themaximum score is 100 points

The Sunnybag LEAF MINI solar panel arrives neatly and compactly packed, without unnecessary packaging material. Superfluous plastic film was avoided.
The solar panel showed no signs of damage or soiling when it was unpacked. The packaging looks well thought out and environmentally friendly, which is a positive aspect, especially for environmentally conscious consumers. The absence of plastic shows that the manufacturer is not only focusing on sustainability in energy generation, but also in the packaging.
The scope of delivery included the solar module and a certificate for testing the solar cells, which creates additional confidence in the quality. The instructions for use can be found on the back of the packaging and can also be accessed as video instructions via a QR code, which is a modern and convenient solution, especially for tech-savvy users.

The first time in your hand

Product processing and appearance

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

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Visual appearance

Attractive design, harmonious and unobtrusive

100

Points

Processing

Good and flawless workmanship, no sharp edges

100

Points

Stability

Sturdy and durable, suitable for outdoor activities

100

Points

Sustainability of the product

100 % certified SUNPOWER solar cells, plastic-free packaging, extended warranty (five years)

100

Points

TOTAL

100

Points

Weighting: 20%
*Themaximum score is 100 points

The design of the solar panel looks appealing and functional to us, so that the solar panel fits seamlessly into outdoor equipment.
The workmanship is flawless, with no sharp edges or production defects. A particularly positive aspect is that the material looks high-quality and stable. It was clearly designed for outdoor use so that it can also withstand harsher conditions.
The material appears robust, which is essential for outdoor use. The sturdy metal eyelets, which enable secure fastening even if the panel is exposed to constant movement, are particularly positive.
In terms of sustainability, the product scores points with its certified solar cells and plastic-free packaging. The manufacturer also offers an extended warranty of five years upon registration, which indicates high product quality and durability.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

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Functionality

Only suitable for charging power banks, direct charging not possible even under optimal conditions

60

Points

Water resistance

Waterproof, suitable for outdoor use even in light rain

100

Points

Cable connections

Firmly mounted, stable, rubber cover desirable

90

Points

Mechanical load capacity

Sturdy, scratch and impact-resistant material

100

Points

Handling and mobility

Relatively light, easy to mount thanks to sturdy metal eyelets

100

Points

TOTAL

90

Points

Weighting: 45%
*Themaximum score is 100 points

In the practical test, the Sunnybag LEAF MINI was particularly impressive when charging power banks. However, charging a smartphone directly was more difficult, as the current strength was often insufficient to ensure a continuous power supply in changing light conditions. Especially in shady areas or under cloudy skies, there were frequent interruptions, which made it difficult to charge a cell phone. Charging a power bank worked, but took a comparatively long time. Nevertheless, the panel’s auto-restart function offers a practical solution for unstable conditions.
The product was also impressive in terms of weather resistance. The panel proved to be waterproof and resistant, so that it works without any problems even in light rain or high humidity.
The material used is also extremely scratch and impact resistant, which ensures a long service life.
The connections are firmly and stably mounted, although the rubber cover for the USB port is missing on this model. A corresponding addition would be useful.
Thanks to its low weight and sturdy metal eyelets, the panel can be easily attached to rucksacks or tents without being a noticeable additional burden. Despite the robust design, however, the problem remains that even the slightest shadow or fluctuating light conditions can have a significant impact on charging performance. Anyone using the panel on the move or in changing weather conditions should therefore be patient. An additional power bank is therefore highly recommended for efficient use.

Test plan

You can find a detailed insight into the evaluation criteria of the practical part of the test and the distribution of points here. If you are also interested in the evaluation of our other test criteria, please read our document on the evaluation process.

Price/performance ratio

and ratings from consumers

Finally, we examine how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

Finally, we examine how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

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Price / performance ratio

Very good performance in the upper price segment

70

Points

Rating cut

Due to a recent court ruling, customer reviews are currently no longer included in the calculation of the overall score

TOTAL

70

Points

Weighting: 15%
*Themaximum score is 100 points

Prices of up to €40.00 are charged on the Internet for equivalent products. Very inexpensive products are available from as little as €19.99 . The Sunnybag solar module is therefore currently in the upper price segment with a price of €39.90. For the quality and performance received, the price-performance ratio is very good.

Overall result

1. packaging & contents

20%

100

Points

2. product processing & appearance

20%

100

Points

3. in the practical test

45%

90

Points

4. price/performance & consumer ratings

15%

70

Points

TOTAL

91

Points

*Themaximum score is 100 points

LEAF MINI
 of the brand 
Sunnybag
achieved
91
Points in our test and therefore passed. The test was carried out in the test period
03/25
and is stored in our database under the licence number
250131002
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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