Review: SunPower 2 Port 15 Watts Portable Solar Charger

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The Blitzwolf SunPower 2 Port 15 watts Portable Solar Charger is a small portable charger that uses the sun to charge your mobile devices and power banks. It is Blitzwolf’s smallest solar charger. But don’t let its size fool you. When off grid it will charge your devices.

Blitzwolf SunPower 2 Port 15 watts Portable Solar Charger – Features

Blitzwolf uses highly efficient solar panels that has a 23.5% efficiency. Older panels and other new panels on the market have a 15% or less efficiency.
If you have two devices you need to charge at the same time the dual USB ports will get the job done. The dual ports us Power3S Technology to identify your connected device and provide the fastest and safest charging current for both devices.
The double-sided reversible USB A male plug to micro USB cable not only allows you to connect it both ways around, but it also supports 5V/9V/12V fast charging at 2.4A max current.
When the clouds hide the sun, the solar charger will automatically start charging once the sun returns.
Don’t worry to much about the rain. The case is constructed with PVC rain proof material.
18 Month warranty

Blitzwolf SunPower 2 Port 15 watts Portable Solar Charger – Specs

Total Maximum Output ：5V/2A
Opened Size：290*530*4 mm
Weight：350g
Power：15W
Panel Type：SunPower
Closed Size：290*160*20 mm

Tips for a Successful Charge

This charger is a light solar charger. Its fast but its low powered. For the best results you need a clear to lightly clouded sky. If its overcast or you are in the shade you will not be able to charge your devices.

To get the fastest charge, point the solar panels directly at the sun and move the panels as the sun moves across the horizon. Laying it flat works but it seems to charge slower.

Charging through a car window or building window works but its slower and you need direct sunlight for best results.

The Carabineers work as designed but I found have wooden/plastic clothespins to clam the panels at the right angle. If you do not secure the panels they may blowr or flip over.

The sun can overheat your device. Make sure to use the pocket or hide the device from the sun.

For a quicker charge only charge one device at a time.

Make sure the sun is fully up. Early morning (just after sunrise) or near sunset isn’t ideal. You won’t be able to charge as fast as during mid day.

The best time to charge is mid morning to early afternoon. Outside of those hours you can still charge, it will be a little slower.

Blitzwolf SunPower 2 Port 15 watts Portable Solar Charger – Review

I received the the Blitzwolf SunPower 2 Port 15 Watts Portable Solar Charger just over a week ago and I have to say I am impressed with what it can do. Its not the most powerful charge but on a clear and sunny day it will charge most devices.

SunPower 2 Port 15 Watts Portable Solar Charger – The Solar Charger Product Design

As to the device itself. Its made well. The panel is attached securely to the pouch. The pouch is made of a tough pvc/canvas type material. It looks like it will protect the panels if it was tossed in a hiking backpack or in the trunk of a car.

What I don’t like about the pouch is the pocket. Its is poorly designed. The pocked is secured with hook and loop fastener. But it is a small piece about the size of a quarter. Because of this the carabineers and cables can fall out. I already lost one carabineer. To fix this all the all the manufacture needs to do is add a longer strip of hook and loop. I will be adding an extra strip before my next trip.

I also found the USB ports are oddly located. Its not on the edge of the pouch but almost centered. Because my LG G4 is on the large side the phone sites on top of the port. If the port was at the edge of the pouch the phone would lay flat and not touch the ports.

I also tried to put my Blitzwolf Power Bank 15600 in the pouch. I have the same issue. It sits across the ports. I’m afraid the ports and devices touching each other will damage each other.

My smaller devices fit nicely into the pouch and can easily be hidden from the sun when charging.

SunPower 2 Port 15 Watts Portable Solar Charger – Testing Results

For my tests I tried some real world tests and tried to charge my devices as if I was camping off grid or if we had a multi day power outage.

Test One – Day Hike or Camping. Charging by securely locking the Solar in your car and charging while away on a hike.

For my first test, I tried to charge a power bank while I was at work. I put the solar panel on the dash board and hid the power bank from the sun. But it was a cloudy day and by the time I got off work my car was in the shade. It only charged from 0% to 25% in about 6 hours. In direct sunlight I believe this will charge your phone. It will be slower than in direct sunlight. But if you are concerned about your devices being stolen while away for long periods time its a safer option.

My second test, I drove around town on a sunny day with the solar panel connected to a power bank. The panel only charged when the device was in direct sunlight. The charger did restart every time the panel was in direct sunlight. I would not recommend trying this. It doesn’t charge fast enough to get it charged if in town. But if you are driving into the sun for long periods of time it may charge your device. You could also park your vehicle in direct sunlight where the panels can see the sun. This will also charge while you are away form the car.

Test Two – Spending the Day at the Lake or Campsite. Charging by putting the panel on a table in direct sunlight for the day.

When it was time for some direct sunlight testing our weather started to change. We went from a sunny day to a partly cloudy day. For this test I used my Anker PowrCore 5000 and placed the solar panels laying flat on a old ice chest in direct sunlight. The device started to charge but after an hour it never gained anymore charge. I tried using this charger several times and couldn’t get anywhere with it.

So I started to test again with my Blitzwolf PowerBank and the charger started charging the power bank. After about an hour the cloud cover came in. I would check on it every 15 minutes or so ( I was outside working) and I could see when it was it charging. When the sun was completely behind the clouds for long periods of time the blinking lights on the power bank stopped blinking. Once the sun came back out it started charging again.

Over the next few days we had 100% cloud coverage and rain. The charger didn’t charge. But that was expected.

After the sun came out, the solar panels charged my devices quickly. It charged my Blitzwolf Power Bank from about 25% to 100% in about 4 hours. I found that I could speed of the charging if I pointed the panels directly at the sun at changed positions.

Once the power bank was completely charged I hooked up my LG G4 and charged it from 4% to 95% in about an hour and a half. During this test, I found that moving the panels to keep it in direct sunlight verses laying flat increases the efficiency of the charge.

Test Three – Spending the Day at the Lake or Campsite Charging Two Devices at Once. Charging by putting the panel on a table in direct sunlight for the day.

For this test I grabbed two small APC power banks and put the panel in direct sunlight for a few hours. After a few hours of charging, the devices had not charged. I believe it was to late in the day for it charge them.

I retested again but because of my work schedule I was only able to start the test about 2 hours before sunset. I was able to get one power bank to charge to about 50% and the other stayed at about 25%.

I started testing about 12 PM and left the power banks charging until about 6 PM. I got at a 0% to 95% charge on both power banks. When charging two devices large or small at the same time expect it to take a while. For large capacity devices it could take several days to fully charge. If you want to charge multiple devices I would get a higher wattage solar charger. For me, I will just charge one at time. I found that I could charge 2 devices one after the other in the time it takes the charger to charge two devices connected and charging at the same time.

Final Thoughts

Overall I like the Blitzwolf SunPower 2 Port 15 watts Portable Solar Charger. It works as designed. The issues with the pouch are not a deal breaker. I plan to take this charger with me on all my camping trips.

If you need a backup charger or need a light weight off grid charger I recommend picking up one of these. If you need a stronger charge and a faster charge. Then I would suggest looking at Blitzwolf’s higher wattage solar chargers. They may even charge better on partially cloudy days.

If you are needing more power try out the Blitzwolf 20W/3A Solar Charger. It has more power and should charge your devices faster. There is also a SunPwer 2 Ports 28 Watt Charger but it is currently unavailable. To see all of Blitzwolf’s Solar Chargers current and future ones, click here. I haven’t had the chance to test these yet but I hope to try them soon. I will update this article if I do.

Currently you can purchase the Blitzwolf SunPower 2 Port 15 watts Portable Solar Charger from Amazon for $36.99. If its isn’t available check Blitztwolf.com for other purchase options.