Reviews Viking Solar Panel SP28W
Reviews Viking Solar Panel SP28W
Interested in reviews of Viking Solar Panel SP28W? It got 4.7 out of 5 stars from our customers. Find specific customer reviews of Viking Solar Panel SP28W below. We will appreciate if you also share your experiences with Viking Solar Panel SP28W after purchasing.
User Reviews
Petr, Praha 10 - Štěrboholy
Rated 06/10/2023, variant Viking Solar Panel SP28W
Verified purchase - review from a price comparison website
Quite light and fits well in a small suitcase
without instructions: -( and no description of the USB charging ports.
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Anonymous customer
Rated 29/06/2023, variant Viking Solar Panel SP28W
Verified purchase
We had to return the first one, but the second one works without any problems
Charges fast enough
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Petr, Praha 6 - Dejvice
Rated 07/02/2023, variant Viking Solar Panel SP28W
Verified purchase
Purchased in the summer of 2022, I wanted to write a review when I have more experience. She has been on a few trips with me and I have given her a lot of work at the cottage or under the tent (I have several of them). I was going to wait to review it until I tried multiple seasons and I have to admit that it was a pleasant surprise. After the purchase I was kind of expecting what I would get, in the summer in the long term the power barely reaches 50% even in the most ideal conditions due to the high temperatures, in addition to the autorestart (the protocol turns off charging every 25 seconds, which then subsequently in the winter proved to be an advantage, but the question is how much it can bother the batteries that are being charged) was really annoying, because in the summer when the sky is clear and the charging settles down to, say, 12W it turns off and then on, and actually unnecessarily and there is no change in power, in winter when more often there is shading due to clouds the power drops and then when the clouds recede the system of most powerbanks does not allow higher charging power to protect the batteries (they think it's an overvoltage for example), so the autorestart can return the power to the maximum possible value, thanks to this you can get about 10% more Wh, which is already quite noticeable. What I really regret is that it doesn't have supports/legs so that I don't have to search for a complicated support when travelling, because the difference between 15° from the sun can make up to 70% difference in performance and that's a huge difference, so I'll have to invent the legs myself, because in practice it's quite difficult to invent and search for something when travelling. So it is much bigger and heavier than the competition (about 30%), but again it seems to me that a little more power is there, plus it can work with both 9 and 12 Volts, which is really worth a lot, because at higher voltages you do not have such a large cross section of the wire, so there is a relative difference 5V and 3A or 9V and 1,5A, in practice to understand this means that you have a wire (charging cable) where you have broken internal wires, which in practice you won't notice much, it just charges slower and because you are charging at a higher voltage more power will go through the damaged/broken wire. I charge mostly Xiaomi/samsung/baseus powerbanks, test with additional load and measure with multimeter or USBmeter. In winter (air temperature -6°C without clouds and wind) it proved to be able to deliver long term even the 18W (maximum charging power of the powerbank) charging power to the fast port and the waste heat during charging beautifully warms up both the regulator and the powerbank itself and therefore absolutely ideal time for charging.
I would definitely recommend it for a longer trip, it's just a bit bigger and heavier and a shame about the legs. I'll see how it will do in spring and I'll complete the review then.
Processing
Price
In winter/autumn autorestart a great thing
3xport USB-A which you can use effectively in one out of 10 cases
It has Czech representation and service where there are guys who have it as a hobby like me and you can chat with them
The brand has a wider range
Works with 5V 9V 12V
It has multiple charging protocols for charging, can work with both PD and QC
Less efficient panels
Weight
Dimensions
Useless in summer autorestart
No supports/legs
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Ondřej, Praha
Rated 19/07/2022, variant Viking Solar Panel SP28W
Verified purchase
a couple of observations after returning from the 9-day Portuguese festival in July: when used in hot weather (temperatures between 35-40), it is good to separate the charged device from the solar charger and cool the charged device (battery) with a cable, or ideally cool both devices at the same time. The charger is not as prone to a drop in performance when playing, as a phone or a power bank. When the phone/power bank is actively cooled, charging times are significantly shorter. I have found it very useful to put a charged phone or power bank into damp (not completely wet) shoes into water. I then placed the solar charger on these wet shoes, in which the phone/powerbank was charged and both were aligned. The wet shoes and the phone were charging in the shade, moreover, it was raised and thus had no contact with the hot ground. The wet shoe then cooled the charged phone perfectly, and in the prime Portuguese summer sun I had the phone fully charged within 50 minutes. The solar charger allowed me to charge my phone perfectly and conveniently, and thus became one of the most valuable pieces of equipment for me. One of the best buys here on Alza!
MacBook Pro M1 / iPad Pro M1 12'9 and iPhone XR can be charged simultaneously
Can charge and work simultaneously on MacBook Pro M1 13' and can recharge the device to 100%
iPhone XR Max charges from 30% to 80% in about 50 minutes and is capable of charging to 100%
Portable and durable, nylon case. Traveling in a barrel on water is not a problem. Traveling in a backpack or backpack is not a problem.
Thanks to the loops and supplied carabiners, it can be pulled over the backpack.
In my opinion, mandatory equipment for every house and apartment. In the event of a blackout, it can be a key device
The eyelets for catching are reinforced with metal inserts - very strong
The carabiners (2 pcs) are solid. They will definitely support the weight of the device
Partial unavailability in stores (7/2022)
The carabiners were in a pack of 2 not 3 as shown on the reverse
Unknown lifespan. We' ll see in 5 years.
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