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The Edge 840 Solar is Garmin's mid-tier GPS cycling computer with a 2.6-inch color touchscreen plus physical buttons, and a Power Glass solar lens that tops up the battery on long days outside. It runs the same training and navigation platform as the Edge 1040, including structured workouts, ClimbPro, multi-band GNSS and crash detection, in a smaller body. Riders pick it over the 1040 for the compact size and buttons, and over the 540 for touch input and solar charging. Owners praise the battery life and screen, and some find the menus deep and the solar gain modest unless you ride in direct sun.
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Reviewers rate the Edge 840 Solar as one of the best all-round bike computers, praising battery life, navigation accuracy and the button-plus-touch control. Criticism centers on the modest real-world solar gain and a busy interface.
The Garmin Edge 840 Solar is a GPS cycling computer with a compact 2.6-inch sunlight-visible display. You can control it with the touchscreen or the push buttons.
Its Power Glass solar charging lens produces extra battery runtime from sunlight. In direct sunlight it adds up to 25 minutes of battery life per hour. Total ride time reaches up to 32 hours in demanding mode and up to 60 hours in battery saver mode.
Multi-band GNSS supports navigation on remote routes. Training features include Real-Time Stamina, Power Guide and Daily Suggested Workouts.
