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 74 ratings
Review Summary
Customer Images
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Selecting an option will reload the available reviews on the pageMarch 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
January 16, 2025
Great upgrade cycling computer
I have owned several Garmin Edge bike computers. I started with the Edge 500 and I was blown away by how much data I could get from a ride on my mountain bike. Since then I have used the Edge 510 and 530 before receiving the Edge 840 as a Christmas present this year. Each release has been a great step forward, but the Edge 840 is significantly easier to use with the touch screen and the refined user interface. I enjoy the hazard and turn warnings and I love being able to use the ClimbPro feature without following a course. This is a great bike computer.
Originally reviewed on Garmin
December 15, 2024
Love it
I bought 3 weeks ago and do not disappoint. All features are great, and the touchless screen is fantastic. Great deal.
Originally reviewed on Garmin
November 25, 2024
Works great with the Garmin Varia
I got this to connect with my Garmin Varia radar. It was also an upgrade from the Edge 130 which would always run out of batteries. The Edge 840 Solar definitely has much more battery life, though there was a week that I forgot to turn it off and somehow it didn't automatically turn off and was out of batteries the morning I wanted to go for a ride. Maybe there's a setting on it that I had it turned off to auto shut down, but otherwise it's a great computer
Originally reviewed on Garmin
November 17, 2024
Perfect for me
I replaced my old 530. This is a definite upgrade. Touch screen is awesome. Solar charging is…ok I guess. I haven’t ridden long enough to see a real charge yet plus it is cloudy all day here in Michigan this time of year.
Originally reviewed on Garmin
November 6, 2024
Takes getting used too.
The new interface takes some getting used to but is pretty nice. Seems like updates disconnect some sensors which then need to be reconnected but otherwise it does everything.
Originally reviewed on Garmin
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