Survival&OutdoorBuddyWater test: it just beads off
Shock-, scratch- and waterproof ETFE surface: he pours water from his canteen over it – it simply beads off.
Sunnybag SUNBOOSTER 28 Refurbished
Phil Collins, Sebastian Vettel, Marc Márquez
own a SUNNYBAG – just like over 270,000 other customers
- Every panel tested individually – test certificate included
- Waterproof, scratch- and shock-resistant (ETFE surface)
- Light & compact – ideal for backpack, bike and camping
- 5-year warranty with free registration
Only 3 left in stock – with you in 2–3 business days
Quantity:
- Free shipping from €50EU-wide · otherwise from €4.90
- 30-day free trialReturn without giving a reason
- 5-year warrantywith free registration
- Secure paymentPayPal, credit card, Apple & Google Pay
As seen on
Refurbished means: this product has already been used or tried out and may show slight signs of use. We have inspected it and it works perfectly. Of course, refurbished products come with the same full statutory warranty and guarantee as our new products.
The Sunnybag SUNBOOSTER 28 is a highly efficient portable solar system with a total output of 28 watts. It is perfect for anyone who loves independence and wants to have power anywhere in the world. Whether hiking, climbing, touring, cycling, camping or at festivals – this solar charger is a reliable companion that keeps your devices powered on the go.
- 28 watts of power – 4 solar cells of 7 watts each
- Light and compact – only 850 grams
- Dimensions 64 x 31 x 0.2 cm
- 2 USB outputs (up to 2 amps at 5 volts)
- 100% certified SUNPOWER solar cells with 22.4% efficiency
- The ETFE-coated surface is waterproof, scratch-resistant and shock-resistant.
- Foldable panel – offers a large surface for maximum energy yield, yet folds up to save space.
- Power Indication Color – an LED shows you how much energy is currently being generated.
- Auto-Restart – function supports charging of iOS devices
Tested
What YouTubers say after testing it
YouTubers poured water over the SUNBOOSTER 28, measured it and charged several devices at once. Click a picture to play the clip right here.
SASCHACertificate: 28.1 W measured
The panel ships with its own test certificate: instead of the promised 28 W, his unit measured 28.1 W.
DerZugvogel64 × 31 cm, folded 16 × 31 cm
Unfolded 64 × 31 cm, folded 16 × 31 cm, 850 g – a big power bank, he says, is certainly no lighter.
Survival&OutdoorBuddyCharges power bank + 2 GoPros
Test setup: the folding panel charges a power bank and two GoPro batteries at once – “insane what it can do”.
Clips from hands-on tests by the YouTube channels shown.
Over 270,000 customers trust SUNNYBAG
What our customers say
4,4/ 5
Based on 499 reviews for our products
- 5 66%
- 4 20%
- 3 6%
- 2 8%
- 1 0%
Photos from our customers
Bewertungen aus unserem Bewertungssystem (Judge.me) sowie importierte Amazon-Bewertungen.
Quality control
In contrast to conventional solar panels, the SUNPOWER cells installed at SUNNYBAG have a significantly higher efficiency - namely 22.4%. To guarantee this, we test each panel for performance before shipping. The test certificate is enclosed with every SUNNYBAG and shows not only the achieved performance but also the day and time of the test. This way you can be sure that your SUNNYBAG delivers what it promises and that your devices are reliably supplied with renewable energy.
Optionally with POWERBANK
Our powerbanks are specially designed for charging with solar energy. They are the perfect temporary storage for the clean solar energy. The optimized power management (OPF technology) allows simultaneous charging and discharging. The powerbank stores the fluctuating solar energy efficiently and delivers it evenly to your smartphone. This is the most efficient way to use your SUNNYBAG.
Who is SUNNYBAG?
We are a young and dynamic company from Austria that develops and distributes portable solar chargers. These charge your electronic devices on the go environmentally friendly with solar energy. Thus, each SUNNYBAG inspires to use renewable energy in everyday life.
Sustainably packed and delivered
We pack our solar panels and powerbanks plastic-free in recyclable boxes. We ship your packages Co2-neutral with the Austrian Post.
Extended warranty
The longer a solar panel is used, the more renewable energy it generates. Therefore, we offer 5 years full warranty if you register your SUNNYBAG.
Häufige Fragen
Lagerware verschicken wir umgehend mit der Österreichischen Post bzw. DHL. In Österreich und Deutschland ist dein Paket in der Regel innerhalb von 2–3 Werktagen bei dir.
Österreich 4,90 €, Deutschland 7,90 € – ab 50 € Bestellwert versenden wir EU-weit kostenlos. Die Konditionen für weitere Länder findest du in unseren Versandinformationen.
Ja. Du hast 30 Tage Zeit, dein SUNNYBAG in Ruhe zu testen. Passt es nicht, schick es einfach an uns zurück und du erhältst den vollen Kaufpreis erstattet – nur die Rücksendekosten trägst du selbst. Details findest du in der Widerrufsbelehrung.
Zusätzlich zur gesetzlichen Gewährleistung erhältst du 5 Jahre Garantie, wenn du dein SUNNYBAG nach dem Kauf kostenlos registrierst. Hier geht es zur Registrierung.
Wir prüfen jedes Paneel vor dem Versand einzeln. Das Test-Zertifikat mit gemessener Leistung, Datum und Uhrzeit des Tests liegt deinem SUNNYBAG bei.
PayPal, Kreditkarte (Visa, Mastercard, American Express), Apple Pay, Google Pay, Shop Pay, eps und Maestro. Alle Zahlungen werden verschlüsselt abgewickelt.
