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Renogy Portable E.Flex Monocrystalline 5W Plus Solar Panel with USB Port for Charging, Hiking and Biking

$199.95

(10 customer reviews)
Last updated on March 22, 2024 12:31 am Details
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  • 【Auto-Optimization Charging Continous charging once back in the sun.
  • 【Portable Included carabineers and suction cups for easy attachment. Ultra-Thin and Lightweight.
  • 【Versatile Different mounting options included. Compatible with any USB device.
  • 【Advantage High efficient monocrystalline solar cells, lightweight, water-resistant, overcharge protection.

Specification: Renogy Portable E.Flex Monocrystalline 5W Plus Solar Panel with USB Port for Charging, Hiking and Biking

Product Dimensions

9.6 x 6.3 x 0.16 inches

Item Weight

5.6 ounces

Manufacturer

Renogy

Country of Origin

Thailand

Item model number

Portable E.Flex

Is Discontinued By Manufacturer

No

Photos: Renogy Portable E.Flex Monocrystalline 5W Plus Solar Panel with USB Port for Charging, Hiking and Biking

10 reviews for Renogy Portable E.Flex Monocrystalline 5W Plus Solar Panel with USB Port for Charging, Hiking and Biking

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  1. Ana

    Review #1: I’ve just received the Renogy 10W (equals two connected 5W panels) solar USB charger. Put it on a precision scale and see that it is not the advertised 11oz weight, but 13.7 confirmed, and that’s without any of the attachments connected. Most won’t care, and I don’t much, except it’s for lightweight backpacking so… ounces tend to matter, a bit. The device seems rugged, though if one has it exposed to the elements you must be aware that the USB port is not protected from rain, dust, etc. Was surprised by the texture of the actual solar collection surface, it’s a ruggedized surface not likely to scratch or shatter… i.e. it’s not simply glass like larger solar panels, which is cool for outdoor activity purposes. I’ll update this review once it’s been through adequate field testing. One thing I do know, Renogy is a top level maker of solar panels… I have one of their larger 100W units that I take car camping w/ me. Is awesome.

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  2. BearPower

    Your browser does not support HTML5 video.

     Best solar panel to date that I’ve used over the years, works extremely well in direct sunlight charging a Samsung Note 8 in less than 2 hours! Performance is reduced when mounted on a back pack due to the movement involved and the poor positioning. Very light and portable thanks to the durable finish and clever design. Thoroughly recommended for hiking/camping/festivals. (Note, For transparency… I am due £10 cashback for posting this review. But trying to be impartial))

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  3. Donkey

    I’ve taken this charger on 3 camping trips and 2 backpacking trips so far. Normally I use this solar charger with a battery bank. With my phone the screen comes on every time a charger is connected or disconnected, which happens when I move from sun to shade or back again when hiking the trail. This makes my phone discharge even faster than if i just left the screen off. With a battery bank this is not a problem. When I get to camp I normally plug my phone directly to the panel, provided that the sun is still out and there is no tree cover. The 5w version (with a battery bank) is good for keeping one phone charged when on the trail and good sky at camp indefinitely, 2-3 phones if you have a stationary place to aim it at the sun all day. I’ve used it in light rain and on a kayak, the panel got wet but not the charge port. Did not break or lower performance. Charging power does get lower with light cloud cover and may stop in heavy dark cloud cover. The charger stopped working during the 2017 total solar eclipse.

    EDIT 07/11/2021: Since buying this I have taken it on MANY trips. but, during a long Bikepacking trip the panned unexpectedly stopped working. I don’t think it was during the rain, probably the crash. Upon getting home and a VERY close inspection I noticed VERY tiny cracks across many of the stripes. I was never really gentle with the panel but seems like flexing is something that it really doesn’t like. Not the panels fault, it’s made for light weight, not impact resistance. So that sucks. But even after several years of use it doesn’t look like there’s another panel that I would pick over it. I’m probably going to end up purchasing another… ?

    The only thing I would change on this panel is to flip the USB port so it points under the panel. That would make it easier to keep the connection ports dry when it gets wet out. I had a very heavy rain kill a battery pack even when the panel kept kicking.

    Not paid for this review but if Renogy is listening I won’t stop you from sending me free stuff.

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  4. jannerfish

    Unobtrusive on stuck on window with sucker grips (supplied) in room that isn’t used much in house. Have the Carabiners (also supplied) on still from a bike ride that kept my phone fully charged for navigating. Plan on using for upcoming camping trip. Well worth the money.

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  5. M. Ross

    I bought the 5W panel for a recent trip to the Himalaya. Initially I was a bit sceptical that the small panel would meet my needs, but over 4 weeks trekking in the mountains, when combined with a backup battery pack, I had no probems keeping two iPhone 5c phones charged and a Kindle.

    The panel does have its limitations – it needs clear skies (so of limited use in typical UK weather) and to be pointing more or less directly towards the sun (so walking with it on the back of a rucksack results in a low charge rate). When set up fully into sun the panel charged my phone battery at 40% per hour, including when stuck with the supplied suckers to an into sun window.

    Drawbacks when charging the iPhone were regular “This device may not be supported” messages. Also every time a cloud passed the sun or the shadow from a tree obstructed the sun, then the panel stops/starts charging giving a “ding” & vibrate from the phone and switching the screen on for 5 seconds – these annoyances were reduced by dimming the screen, switching to silent mode & toggling off “vibrate on silent”, but of course that meant incoming calls could not be heard (if you have a phone signal in the mountains that is!). Hence only 4 stars.

    I would definitely recommend the 5W panel for those wanting a light weight and long term charging solution, but it needs to be used in the right climate in combination with a back-up battery pack to cater for cloudy days.

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  6. Oliver

    To test this solar panel I’ve been using the 5w panel to charge charging an external battery pack from which I am charging my cellphone.

    The solar cell sits in a south facing window all day charging the battery pack and I charge my phone from the battery in the evenings.
    Its been overcast and raining for 5 days now and the battery pack is very low, but every day I get enough sun to fully charge my phone.

    I’m using my phone as I normally do to read the news, check email, listen to music, etc. (normal is different for everyone, I know), so I’m confident that if there was an extended blackout (like in PR right now!) this panel would keep my phone well charged.

    In one sunny day this can charge my 3000mAH external battery from 0 to 100% by about 1400.

    One drawback:
    The port on the back of the panel is not water proof. If you are using this outside in a dusty, wet, or salty environment this will surely be a problem. If this unit had an integral ~1m USB cable then that non-waterproof connection could be tucked inside a backpack, inside your window, or otherwise taken out of the elements.

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  7. Joel

    It’s good design and for its size and 10W power rating able to charge a iPhone in bright Sun quicker than advertised but a warning of classical Apple style that’s not a recognized item. So perhaps use with a recommendation of a power pack battery first as an intermediary to stop any issues.
    It is not anything other than a first class product very efficient and has been designed to not drain the other way and stops charging until sufficient light is available. It then comes back on fully charging at good rates.
    After problem with another brand of trickle charger I think this is another game changer and a worthy buy.

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  8. Ataraxian Monkey

    I’m currently hiking long distance trails in middle-eastern deserts so i’ve been using it everyday. For the record, i’ve used solar chargers while hiking for the past 10 years and recently bought this one because my favorite one was wearing out from all the scratches.
    Here’s the mystery: the panel performed flawlessly during testing before the trip and then for 2 weeks in the Jordan desert with my battery pack and others, i was extremely happy with it. And for the past 2 weeks it’s been the exact opposite: it no longer produces any power. I’m always under clear skies here in the desert, and i’ve tried to change all variables: the cable, the battery, the exposure, the temperatures… it just won’t work. It thinking maybe something broke inside the usb connector but i know it wasn’t due to any mishandling or water 🙁
    I’m noticing only a couple of other reviews who had similar mysterious failures. I’m so desperate for it to work again, it’s a critical to my gps navigation.

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  9. Miss C M Tuke

    Considering how cheap this piece of kit is I was pleasantly surprised by the efficacy of it’s charging capabilities. I have just completed a 10 day hike in Corsica and each day when we got to camp I plugged my Garmin watch into this panel, and each day it was completely charged within about 30 mins. It was also capable of charging a smart phone by about 10-15% in an hour. Admittedly it was sunny and “perfect” conditions for solar charging, and I don’t know how it would work on a grey day in England. It was also lightweight and seemed relatively robust. I would definitely recommend for travelling / hiking in sunny climates. Exceptional value for money.

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  10. edfardos

    I was skeptical at first, but on a crisp, clear November morning in Northern California, it charged my Galaxy S4 Mini from 38% to 100% in two hours! I put some tinfoil on the ground in front of the unit, to catch some reflection too. I weighed this device at 6oz, for you backpackers out there. It’s worth it. The other 20+ watt panels are 16+ ounces.

    Update: I subsequently purchased the “10 watt” version of this, which is essentially two panels hinged together.

    5watt: 0.80A max
    10watt: 1.28A max

    Unfortunately the double-panel (10watt) version isn’t twice the charge rate, but it is twice the weight. I confirmed the destination would accept more than the max, so the panel is the limiting factor.

    This is in Northern California. Adding tinfoil as a mirror below the panel buys you an additional 0.10A – worth it!

    I’m being picky as I’ll use these for backpacking. The bang-to-weight ratio is critical and every gram counts. I’ll likely take the 5watt/single panel with me.

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    Renogy Portable E.Flex Monocrystalline 5W Plus Solar Panel with USB Port for Charging, Hiking and Biking
    Renogy Portable E.Flex Monocrystalline 5W Plus Solar Panel with USB Port for Charging, Hiking and Biking
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