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Edge 840 Solar Bike Computer

4.125 out of 5 stars
40 Reviews
Current price: $499.99 Original price: $549.99
9% off



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.


  • 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
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
Mount Type
out-front mount, standard mount
Edge 840 Solar, out-front mount, standard mount, tether, USB-C cable, documentation
2.3 x 3.4 x 0.8in
Face Size
2.6in (diagonal)
Claimed Weight
84.9g (3.0oz)
Manufacturer Warranty
cross-country, enduro, gravel, road cycling, trail

Overall Rating

4 based on 40 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 4 reviews
3 Stars - 6 reviews
4 Stars - 7 reviews
5 Stars - 22 reviews

What do you think about this product?


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4 out of 5 stars

May 17, 2024

Lots of improvements but a frustrating interface

Nice hardware upgrade, not sure solar on this model is really worth it, the change to the interface is a pretty big step with a fairly large learning curve which will frustrate some.


Originally reviewed on Garmin

5 out of 5 stars

May 9, 2024

Solar FTW!

Love the touch screen, USB-C charger, and bright display, but of all these awesome features, the Solar is just a game changer!

Derek T

Originally reviewed on Garmin

4 out of 5 stars

May 8, 2024

Seems great, terrible instructions

So far so good I guess. The 840 seems great, but I am struggling with how to use it. This is my first Garmin product so I have no experience with using them and there are essentially no instructions provided. Even most YT videos out there are assuming you have some experience with Garmin. For example, is there a simple shortcut back to the ride screen when the computer is showing something else? I don’t know? I haven’t found any indication that there is. Sometimes in the middle of a ride I’m left fumbling around with buttons or the touch screen trying to return to the ride screen just in hope of randomly ending back up there.


Originally reviewed on Garmin

3 out of 5 stars

April 23, 2024

Works well, but UI and Solar are awful

So, yeah, you get all the great metrics from power meters, cycling dynamics, hill climbs, and even messages. But the GUI is the worst I've ever seen (that's coming from a UI designer who's seen some pretty bad designs). The solar glass reduces the screen's visibility more than it does to improve battery life.


Originally reviewed on Garmin

5 out of 5 stars

April 2, 2024

Right Size and Battery Lasts!

I am using this to train for a century in the mountains. It’s perfect. Lightweight, functional, and extra cabbage for solar is worth it!

Colonel FlashCarbon

Originally reviewed on Garmin

5 out of 5 stars

March 16, 2024

Outstanding Device

It does an outstanding job that all bike computers do. I am still finding new aspects of the device. The alert to eat or drink is really useful on longer rides. The solar is not as efficient as some their other devices. Still is nice to have a little extra charge to get home.


Originally reviewed on Garmin

5 out of 5 stars

January 23, 2024

The best cycling computer

I've got Edge 840 Solar from my wife as a present. I've previously used other cycling computers and phone. The Edge 840 Solar is simply fantastic. I combines the best of both worlds with buttons (easy to use in winter gloves) and touchscreen (easy to navigate map). The number of features and screens - well, I have not learned all of them yet. However, even with out of box settings - it already setup perfectly and been useful from the day 1.


Originally reviewed on Garmin

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.


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.


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.


Originally reviewed on Garmin