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Garmin
Edge 840 Solar Bike Computer

4.0606060606060606 out of 5 stars
33 Reviews
$549.99
Color:Black

Size:

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Why We Like The Garmin Edge 840 Solar Bike Computer

The Garmin Edge 840 Solar Bike Computer brings all of the features we love about the Edge 840 with the unique addition of solar charging. When charging in direct sunlight, our battery will last up to 60 hours, adding up to 25 minutes per hour while in battery saver mode to allow longer rides. When used with a compatible heart rate monitor or power meter, we are provided with adaptive coaching, personalized workouts, and stamina insights to help us gauge how much is left in our tank. Whether riding on the road, gravel, or deep in the woods on our favorite dirt trail, the integrated multi-band GNSS technology ensures we stay on the path with superior location accuracy.


Details

  • The same Edge 840 we know and love with the addition of solar charging
  • Battery life lasts up to 60 hours when charging in direct sunlight
  • Responsive touch screen and button controls combine for simple use
  • Personalized insights when connected to a power meter or HR monitor
  • GNSS multi-band technology keeps us riding through dense trees
  • Syncs to the Garmin Connect app to share with Strava, TrainingPeaks, etc
  • Item #GRMF06J
Housing Material
silicone
Clock
yes
Wireless
yes
Backlight
yes
Water-Resistant
IPX7
Battery Type
Lithium ion cell contained in equipment
Battery Life
[demanding use] up to 32 hours, [battery saver mode] up to 60 hours
Low Battery Indicator
yes
Mount Type
out-front mount, standard mount
Includes
Edge 840 Solar, out-front mount, standard mount, tether, USB-C cable, documentation
Dimensions
2.3 x 3.4 x 0.8in
Face Size
2.6in (diagonal)
Claimed Weight
84.9g (3.0oz)
Manufacturer Warranty
limited
Activity
cross-country, enduro, gravel, road cycling, trail

Overall Rating

4 based on 33 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 4 reviews
3 Stars - 5 reviews
4 Stars - 5 reviews
5 Stars - 18 reviews

What do you think about this product?

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4 out of 5 stars

November 5, 2023

Not intuitive to set up. Need help

I used this for the first time and it kept shutting off throughout my first ride. The problem with that was it stopped engaging with my Garmin radar and was a bit dangerous.

JohnnyG

Originally reviewed on Garmin

5 out of 5 stars

November 3, 2023

Great improvements

I think the option to have both the buttons and touch screen is a great option…especially during a race or riding singletrack. The UI is a nice an improvement with the added colors and features.

TLID

Originally reviewed on Garmin

5 out of 5 stars

October 13, 2023

Center of my Garmin ecosystem

I have the 840 Solar, HRM Pro, Varia headlight and taillight radar and I’ve been really happy with the system. The touch screen functionality is worth the extra cost, and the spray is a really cool feature. I like seeing how much time I’ve gained with the solar charging. The battery life is so good that I’ll probably never be in a situation where I have to rely on the solar power alone, but it’s fun to track.

F40_Endurace

Originally reviewed on Garmin

3 out of 5 stars

October 10, 2023

840 is great, solar, not sure

Admittedly I'm a Garmin fanboi. I'm fully invested into their ecosystem and I love the integrated metrics their devices provide, so I thought it was a no brainer to upgrade my Edge 530 to an Edge 840 Solar. First, the good. The interface is great. It's very intuitive and things are as you would expect. Configuring data screens on your phone vs on the Edge itself is SOO much easier. Full time ClimbPro, without have a route loaded. This is good, but it seems to have the bug that DC Rainmaker and GPLlama and a whole host of other Youtubers has described. It will often start well in to a climb and just be off. I'll be at a steep section and ClimbPro will show me at a mild section, and vice versa. Then I'll crest the top and it will show there are still a couple hundred feet to go. I'm confident this will eventually get fixed, but until then it's kind of just a gimmick, it used to be great when it worked. Now for the Solar. I give Garmin a lot of credit for the innovations of adding solar, as far as I know, no one else is doing it and you can bet they are now looking at it. That said, it's not worth the premium. I live in Colorado, we have bright sun all day long here. I did a 2hr ride at dusk at 5pm, had the Edge flat like Garmin suggests, got zero solar time. Ok, so it was encroaching on evening you say? Well, I did a 2.5hr ride at 11am, in bright full sun, I got 14min back. A couple days later I did a 2hr 1pm ride in bright full sun and got 9min back. Not only that, but the solar screen on the 840 is dimmer in contrast, so you have to run a lot more brightness to see it, which sucks the battery big time. The battery widget now shows you estimated time remaining as you change brightness. Overall, is it a worthwhile upgrade over the 530, probably, but not the solar, go with the non-solar. I do love Garmin and I was kind of sad to write this review.

Scott22

Originally reviewed on Garmin

4 out of 5 stars

October 10, 2023

one problem

i really like the Garmin, especially the solar chargin. i had an old Garmin and the battery was really short lived. one problem we had which my bike shop had trouble solving was getting the power meter to pair with the device. it still is difficult but i have found that if i turn the device off and on several times it will learn how to pair.

tonyh

Originally reviewed on Garmin

4 out of 5 stars

September 30, 2023

Needs some tweaking

Most of the functions are the same as the 830 it replaced though the menus are a little different and require some relearning. I like the way it transferred most settings from one unit to the other during the upgrade. My biggest complaint is the Fitness Age calculation difference from the 830 to the 840. On the 830 my Fitness Age was 55 or 56 (I’m 71 years old). My VO2 was in the top 10-15% for my age. I’m in the top ten for my age on almost every Strava segment I ride. I’m a little overweight but not obese. On the 840 it lists my resting heart rate as 93 even though I’ve manually entered it as 62 (and measured last week at the doctor’s office as 59). Suddenly my Fitness Age is 100. In less than two weeks I’ve aged remarkably according to the 840 even though I’ve actually put in more time and effort. My second complaint is the maximum heart rate “calculation.” In the last seven years I’ve never gotten my heart rate over 154. One theoretical heart rate calculation says, at the age of 71, my max should be 149. The new 840 is giving me “new” max heart rates in the 160s even though the stats at the end of the ride don’t indicate anything over 134. Just a few tweaks to the system might be able to make the 840 more consistent and as reliable as the 830 was.

Contrebassiste

Originally reviewed on Garmin

1 out of 5 stars

September 28, 2023

No Auto-Off feature + solar feature is not good

Dear, This garmin doenst have a Auto-Off feature, as we have in Wahoo Roam v2. The solar feature doenst charge well the device. Iam not using this anymore

Originally reviewed on Garmin

5 out of 5 stars

September 27, 2023

Solar 840

I bought this about a month ago and it has lived up to the hype

Cycling in tex

Originally reviewed on Garmin

5 out of 5 stars

September 11, 2023

EVERYTHING YOU NEED AND MORE!

I'VE BEEN USING THE 1040 SOLAR NOW FOR CLOSE TO A YEAR... WHEN THE NEW AERO BIKE ARRIVED I REALIZED THE 1040 DIDN'T QUITE CLEAR THE STEM SO I DECIDED TO TAKE THE PLUNGE AND SNAG A 840 SOLAR. FOR THE PAST 3 1/2 WEEKS I'VE LOGGED 1200 MILES ON THE NEW BIKE AND LOVE THE COMPUTER!

Originally reviewed on Garmin

5 out of 5 stars

September 6, 2023

Great Update!

My son needed a new bike computer so used this as an excuse to buy the new 840. Terrif update over the 830. Solar works well and the new climb pro is solid.

C-Dub22

Originally reviewed on Garmin