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
Reviews
Q&A
What do you think about this product?
Overall Rating
4 based on 79 ratings
Review Summary
Customer Images
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Selecting an option will reload the available reviews on the pageApril 20, 2025
Just learning
This was a gift and I am just getting started learning the features. So far it has been pretty easy to load a route and save the ride. I need to make the font a little larger or at least define the contrast better. Let me know if that is possible
Originally reviewed on Garmin
April 11, 2025
840 Solar
So far it’s amazing, I just need to get used to all of the features
Originally reviewed on Garmin
April 6, 2025
Great tool to improve training and performance
Compatible with all you bike sensors and gadgets, great tool to maximize, track and improve your rides. Touch screen is a great advantage to toggle between screens during rides. Recommended
Originally reviewed on Garmin
April 6, 2025
Decent bike computer but screen too dim
Overall this is a good device with lots of features, but the screen is very dim and difficult to read in either the dark or direct sunlight. The solar charging doesn’t offer much benefit either and the battery drains pretty fast.
Originally reviewed on Garmin
April 1, 2025
I’m keeping it, almost perfect
*photo is of the the larger 1040 (or whatever #it is garmin, it was unnecessary for me and i prefer the 840). Plan ahead for time to sit down with necessary charging, WiFi, and account login information to setup the device. Once setup - it’s awesome. It lasted 6 days (lots of desert sun exposure) on the solar charging, had at least 6-10 different routes loaded, sharing information/updates/notifications, checking the screens/switching between screens for various metrics during long bike rides…idk how much more I could have been using unnecessary screen time with it, but it never died (#teamamerica). Also it does passively charge in the sun when it’s not in use! I’m keeping mine. Even though I wish it had more options/range for articulating how it sits on my drop bars. It’s not enough to negate the other advantages of it.
Originally reviewed on ExpertVoice.com
March 13, 2025
As a replacement for my old 540...
It's probably a no-brainer as to why this was a HUGE improvement! Everything works great, and the additional data has been very useful!
Originally reviewed on ExpertVoice.com
March 7, 2025
Poor readability
Too much white space, poor font makes for inefficient use of screen space. I find this to be much less readable than my Wahoo Roam 2. I've tried optimizing the screen content but can't fit as much useful data on the screen and still have it in a readable format. It's also missing nice touches like coloring gradient, etc.
Originally reviewed on Garmin
February 25, 2025
Cannot connect to Garmin Connect
I bought this several months ago and cannot get Garmin Connect to recognize my device. I have tried everything…deleting and reinstalling Garmin Connect, installing it on a different computer, buying a different cable. Nothing works.
Originally reviewed on Garmin
February 11, 2025
Buggy and unreliable but great when it works.
I have had the 840 Solar for about a year now. I feel like I need it for navigating long rides and it is very good to have when it works, but it goes dark, freezes or simply fails to track distance, HR, speed or the other metrics too often to be used as a training tool. Amateurs may find the 840 worth it overall, but serious riders, club riders and fitness enthusiasts need to consider more professional options.
Originally reviewed on Garmin
January 26, 2025
Returned and exchanged for the Edge 1050
Display is difficult to read in the sun. To fix that you have to adjust the backlight settings, which completely chewed through my battery in a 5 hr ride. Also, the Garmin was in the sun during the ride but did not gain any charge.
Originally reviewed on Garmin
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