Those who spend serious time outdoors know most smartwatches fade long before the day is over. Battery anxiety, shaky GPS, and fragile builds tend to surface exactly when weather turns and power outlets disappear.
Tired of long routes and rough conditions exposing where gear falls short?
Within Garmin’s lineup, the Fenix name has long stood for serious multisport and expedition use. The Fenix 8 Solar continues that lineage as the latest generation, refining ideas Garmin has developed over years rather than chasing reinvention. It is not the company’s first solar-powered watch, but it represents the most complete version of that approach and sits at the top of Garmin’s outdoor range.
It represents the most complete version of that approach and sits at the top of Garmin’s outdoor range.
Garmin’s Fenix 8 Solar is aimed squarely at that frustration, positioning itself as a watch for people who would rather trust hardware than hope software behaves. At £949.99 for the 51mm Solar model, it is undeniably expensive, so the real question is whether it actually earns that price.
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Built for the outdoors
From the outside, the Fenix 8 Solar looks purposeful rather than flashy. The titanium case feels dense and reassuring, and the sapphire crystal covering the display shrugs off scratches that would destroy typical smartwatch glass. Garmin sticks with a 1.4-inch transflective MIP screen, prioritizing visibility and efficiency over punchy colors.
In bright sun, maps and data fields stay readable without cranking brightness, which matters far more at mile twenty than vibrant animations ever will. A built-in LED flashlight, including a red safety mode, sounds minor until you find yourself setting up camp or navigating a trail before sunrise.
Battery life is where this watch separates itself. In smartwatch mode, Garmin rates it for up to 48 days, thanks to a 618mAh battery paired with solar-assisted charging. Even if you push hard with multi-band GPS tracking, long days barely dent it.
Garmin rates battery life for up to 48 days, thanks to a 618mAh battery paired with solar-assisted charging.
Realistically, you are looking at weeks between charges or 56 to 78 hours of continuous activity tracking, depending on settings. Solar charging does not replace plugging it in, but it noticeably stretches runtime, especially on extended trips where outlets are nonexistent.
A reliable navigation
Navigation is another area where the Fenix 8 Solar feels purpose-built. Multi-band GNSS, SatIQ, and broad satellite support deliver reliable tracking that holds steady through switchbacks, tree cover, and mountain terrain.
Topographic maps are preloaded, GPX routes sync easily, and integration with platforms like AllTrails simplifies planning. Map redraws still lag at times, reminding you this is not a phone strapped to your wrist, but reliability beats speed when you are depending on it to get home.
Garmin also expanded what the watch can do off the trail. For the first time in the Fenix line, you get a microphone and speaker, enabling voice commands, phone calls when paired, and access to Siri or Google Assistant.
A depth gauge and dive features broaden its appeal beyond hiking and endurance sports, while training tools like Garmin Coach, Endurance Score, Training Load Focus, Body Battery, ECG, and recovery tracking make it equally useful for structured training blocks.
Not without compromises
Not everything will please longtime Garmin users. Button feedback feels shallower than older Fenix models, which is noticeable with gloves or cold fingers. Early firmware had stability issues, although updates have smoothed most of them out.
You can also choose an AMOLED version, effectively absorbing what used to be the Epix lineup, while the cheaper Fenix E trims £223 by removing hardware features like the flashlight, speaker, and dive tools.
Ultimately, this is not a watch you buy casually. If your activities rarely stretch beyond a day or two, cheaper options make more sense. But if you want something that keeps going when charging is not an option and conditions are unpredictable, the Fenix 8 Solar delivers exactly what it promises.
