Built to Last / The rankings
The best solar GPS watches: every current model, ranked by what the lens actually adds
Seven watches with a solar lens over a GPS chip. Garmin publishes the with-and-without figures for each; Suunto publishes its own. Here they are in one table, with the winner decided by the smartwatch row.
By Mike M.Updated Published Researched from the maker's manuals and spec sheets
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Our top pick
Garmin Instinct 3 Solar (50mm)
The only watch here rated unlimited in smartwatch mode; 260 GPS hours with solar.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin Instinct 3 Solar (50mm)
Quick picks
The rankings at a glance
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 | Garmin Instinct 3 Solar (50mm) The only watch here rated unlimited in smartwatch mode; 260 GPS hours with solar. | Best solar GPS watch overallSolar GPS | 9.8 /10 | |
| 2 |  Garmin fenix 8 Solar (51mm, Sapphire) 48 days with solar, 653 max-battery hours with solar, sapphire, titanium, dive rating. | Best solar GPS watch with mapsSolar GPS | 9.8 /10 | |
| 3 |  Garmin Enduro 3 320 GPS hours with solar, 90 days smartwatch, 63 g. No stated water rating. | Longest GPS hours with solarSolar GPS | 9.7 /10 | |
| 4 |  Garmin fenix 9 Pro (51mm) Solar on select fenix 9 Pro models rated up to 57 days, per Garmin's August 2026 release. | Newest solar optionSolar GPS | 9.7 /10 | |
| 5 |  Garmin Instinct 3 Solar (45mm) Unlimited with solar, 130 solar GPS hours. | Best solar GPS watch for small wristsSolar GPS | 9.6 /10 | |
| 6 |  Suunto Vertical Titanium Solar 60 days with solar, 90 multi-band hours with solar, sapphire, titanium. | Best non-Garmin solar GPS watchSolar GPS | 9.6 /10 | |
| 7 |  Garmin Instinct 2 Solar (45mm) Unlimited with solar, 145 solar GPS hours; older platform, no flashlight. | Best value solar GPS watchSolar GPS | 9.4 /10 |
#ad · Prices come live from Amazon, last checked November 12, 2026. Scores are ours, built from the makers' manuals, battery tables and spec pages. Product photos come from Amazon; anything still on a stock frame is labelled on its card. Tap a row for the full write-up.
The table
| Watch | Smartwatch | Smartwatch with solar | GPS | GPS with solar | Longest mode with solar |
|---|---|---|---|---|---|
| Instinct 3 Solar 50mm | 40 d | Unlimited | 60 h | 260 h | Unlimited (max-battery, expedition) |
| fenix 8 Solar 51mm | 30 d | 48 d | 95 h | 149 h | 653 h max-battery |
| Enduro 3 | 90 d | — | 120 h multi-band | 320 h GPS | 320 h |
| fenix 9 Pro 51mm | 31 d | 57 d | Not in release | Not in release | — |
| Instinct 3 Solar 45mm | 28 d | Unlimited | 40 h | 130 h | Unlimited |
| Suunto Vertical Titanium Solar | 30 d | 60 d | 65 h multi-band | 90 h | 500 h power-saving |
| Instinct 2X Solar 50mm | 40 d | Unlimited | 60 h | 145 h | Unlimited |
| Instinct 2 Solar 45mm | 28 d | Unlimited | 30 h | 48 h | Unlimited |
Every Garmin figure is from the model's owner's manual or press release; the Suunto figures are from its product page. Garmin publishes the Enduro 3 as headline numbers (320 GPS hours with solar, 90 days smartwatch) rather than a with-and-without table, so its solar smartwatch cell is blank.
What the lens adds, mode by mode
In smartwatch mode the lens takes the Instinct from 40 days to unlimited, the fenix 8 51mm from 30 days to 48, the Suunto from 30 to 60. In GPS-only mode it takes the Instinct 3 50mm from 60 hours to 260, the fenix 8 51mm from 95 to 149, the Suunto from 65 to 90. In Garmin's low-rate max-battery mode it takes the fenix 8 51mm from 186 hours to 653. The pattern: the lens helps most where the draw is lowest. A watch sitting in smartwatch mode on a sunny wrist can genuinely stop charging; a watch tracking at full rate gets a meaningful but finite extension.
Lens size decides the GPS row
The Instinct 3 Solar 50mm doubles the 45mm on solar GPS hours (260 vs 130) with the same non-solar cell difference of only 60 vs 40. The fenix 8 Solar 47mm's all-systems row barely moves with solar (48 to 49 hours) while the 51mm's goes from 68 to 92. Bigger lens, more current, and the effect is largest exactly where the GPS draw is highest. If solar GPS hours are the reason you are buying, buy the largest case you can wear.
The 50,000-lux assumption
The mistake buyers make
Buying the AMOLED version of a solar watch. Garmin's AMOLED Instinct 3 and fenix 8 models have no solar lens, and the Suunto Vertical 2 dropped it. If solar is why you are here, the model name has to say Solar; see Instinct 3 Solar vs AMOLED.
The decade pick
In detail
The picks, in full
Rank 1
Best solar GPS watch overall
Garmin Instinct 3 Solar (50mm)
The only watch here rated unlimited in smartwatch mode; 260 GPS hours with solar.
EvidenceResearched · every row sourced
What the 9.8 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- Garmin's own table shows the 50mm solar model doubling the 45mm in GPS-with-solar hours (260 vs 130).
- Physical buttons, a monochrome display readable in full sun, and a flashlight with a red mode.
- 10 ATM rating and a MIL-STD 810 claim on a watch that costs less than half a fenix.
Good to know
No maps: it navigates breadcrumb trails and waypoints, not topo maps.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin Instinct 3 Solar (50mm)
Rank 2
Best solar GPS watch with maps
Garmin fenix 8 Solar (51mm, Sapphire)
48 days with solar, 653 max-battery hours with solar, sapphire, titanium, dive rating.
EvidenceResearched · every row sourced
| Power class | Solar GPS. A rechargeable cell topped up by a solar lens. Weeks between charges; the cell still ages like any lithium battery. |
|---|---|
| Battery (smartwatch) | Up to 30 days typical use; up to 48 days with solar |
| Battery (GPS) | Up to 95 hours GPS-only; up to 149 hours with solar |
| Battery (max GPS) | Up to 186 hours max-battery GPS; up to 653 hours with solar |
| Battery (solar) | Expedition GPS mode up to 50 days; up to 118 days with solar |
| Glass | Scratch-resistant sapphire lens (sapphire versions) |
| Bezel & case | Titanium bezel (sapphire versions); leakproof metal buttons; sensor guard |
| Water rating | 40-meter dive-rated case |
| MIL-STD-810 | Tested to U.S. military standards for thermal, shock and water resistance |
| Maps & GPS | TopoActive maps preloaded on sapphire versions |
| Flashlight | Built-in LED flashlight with variable intensities, red light and strobe |
What the 9.8 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- Sapphire, titanium and leakproof metal buttons on a case Garmin dive-rates to 40 m.
- 653 hours of max-battery GPS with solar is the longest figure in Garmin's fenix 8 table.
- Preloaded topo maps, a speaker and mic, and a flashlight.
Good to know
A MIP display in a world of AMOLEDs; that is also why the battery lasts.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin fenix 8 Solar (51mm, Sapphire)
Rank 3
Longest GPS hours with solar
Garmin Enduro 3
320 GPS hours with solar, 90 days smartwatch, 63 g. No stated water rating.
EvidenceResearched · every row sourced
| Power class | Solar GPS. A rechargeable cell topped up by a solar lens. Weeks between charges; the cell still ages like any lithium battery. |
|---|---|
| Battery (smartwatch) | Up to 90 days in smartwatch mode |
| Battery (GPS) | Up to 320 hours in GPS mode with solar charging; up to 120 hours with multi-band SatIQ |
| Glass | Scratch-resistant sapphire lens |
| Bezel & case | 51mm titanium bezel; UltraFit nylon band |
| Maps & GPS | Preloaded TopoActive maps |
| Flashlight | Built-in LED flashlight with variable brightness, red light and strobe |
| Weight | 63 grams |
What the 9.7 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- 320 GPS hours with solar is the largest GPS figure Garmin publishes for any watch we list.
- Lighter than a 51mm fenix 8 thanks to the nylon strap and titanium bezel.
- Sapphire and preloaded maps.
Good to know
Garmin's Enduro 3 release does not state a water rating or MIL-STD line, so we do not claim them here.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin Enduro 3
Rank 4
Newest solar option
Garmin fenix 9 Pro (51mm)
Solar on select fenix 9 Pro models rated up to 57 days, per Garmin's August 2026 release.
EvidenceResearched · every row sourced
| Power class | Solar GPS. A rechargeable cell topped up by a solar lens. Weeks between charges; the cell still ages like any lithium battery. |
|---|---|
| Battery (smartwatch) | Up to 31 days in smartwatch mode; solar models up to 57 days |
| Glass | Sapphire lens |
| Bezel & case | Titanium watch case (first fenix with a titanium case) |
| Water rating | Dive-rated up to 40 meters |
| Display | AMOLED up to 3,000 nits; 51mm has a 1.5-inch AMOLED |
| Maps & GPS | 64 GB memory; maps 30% faster to pan; perspective view mapping |
| Sensors | inReach connectivity on all Pro sizes; satellite weather; LiveTrack via LTE |
| Flashlight | Integrated LED flashlight with green light mode |
What the 9.7 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- A titanium case, not just a titanium bezel; sapphire on top.
- Solar on select Pro models pushes the AMOLED fenix past 50 days for the first time.
- Twice the map storage of the fenix 8, with inReach built in.
Good to know
Weeks old at the time of writing; there is no long-term ownership record yet.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin fenix 9 Pro (51mm)
Rank 5
Best solar GPS watch for small wrists
Garmin Instinct 3 Solar (45mm)
Unlimited with solar, 130 solar GPS hours.
EvidenceResearched · every row sourced
| Power class | Solar GPS. A rechargeable cell topped up by a solar lens. Weeks between charges; the cell still ages like any lithium battery. |
|---|---|
| Battery (smartwatch) | Up to 28 days typical use; unlimited with solar (3 hr/day at 50,000 lux) |
| Battery (GPS) | Up to 40 hours GPS-only; up to 130 hours with solar |
| Battery (max GPS) | Up to 100 hours max-battery GPS; unlimited with solar |
| Power | Rechargeable, built-in lithium-ion battery with solar charging display |
| Bezel & case | Metal-reinforced bezel; fiber-reinforced polymer case |
| Water rating | 10 ATM |
| MIL-STD-810 | Built to MIL-STD 810 for thermal and shock resistance |
| Flashlight | Built-in flashlight with variable intensities, a red light and strobe mode |
What the 9.6 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- Every durability claim of the 50mm (10 ATM, MIL-STD 810, metal-reinforced bezel) in a size that fits under a cuff.
- Still 'unlimited' in smartwatch mode under Garmin's solar assumption.
- Flashlight on every Instinct 3 size, which the Instinct 2 45mm never had.
Good to know
Half the GPS-with-solar hours of the 50mm (130 vs 260) because the lens is smaller.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin Instinct 3 Solar (45mm)
Rank 6
Best non-Garmin solar GPS watch
Suunto Vertical Titanium Solar
60 days with solar, 90 multi-band hours with solar, sapphire, titanium.
EvidenceResearched · every row sourced
| Power class | Solar GPS. A rechargeable cell topped up by a solar lens. Weeks between charges; the cell still ages like any lithium battery. |
|---|---|
| Battery (smartwatch) | Up to 30 days daily use (60 days with solar); standby up to 60 days (1 year with solar) |
| Battery (GPS) | Up to 65 h multi-band (90 h with solar); up to 90 h single-band (140 h with solar) |
| Battery (max GPS) | Up to 500 h in power-saving GNSS modes |
| Glass | Sapphire crystal |
| Bezel & case | Titanium Grade 5 bezel; glass fiber reinforced polyamide case |
| Water rating | 100 m |
| Display | 1.4-inch matrix (MIP) |
| Maps & GPS | Free offline outdoor maps, 32 GB map storage; dual-band GNSS, L1 + L5 |
| Weight | 74 g / 2.61 oz |
| Operating temp | -20°C to +55°C (-5°F to +130°F) |
What the 9.6 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- Solar, sapphire and titanium at 74 g, lighter than a fenix 8 51mm.
- 500 hours in power-saving GPS is the highest Suunto figure and beats the fenix 8 Solar 47mm's max-battery figure without solar.
Good to know
Previous generation: no flashlight, dimmer MIP screen, older optical heart rate.
#ad · Suunto list price as of November 6, 2026 · Disclosure for the link to Suunto Vertical Titanium Solar
Rank 7
Best value solar GPS watch
Garmin Instinct 2 Solar (45mm)
Unlimited with solar, 145 solar GPS hours; older platform, no flashlight.
EvidenceResearched · every row sourced
| Power class | Solar GPS. A rechargeable cell topped up by a solar lens. Weeks between charges; the cell still ages like any lithium battery. |
|---|---|
| Battery (smartwatch) | Up to 28 days; unlimited with solar (all-day wear, 3 hr/day at 50,000 lux) |
| Battery (GPS) | Up to 30 hours; 48 hours with solar |
| Battery (max GPS) | Up to 70 hours; 370 hours with solar |
| Battery (solar) | Expedition GPS mode up to 32 days; battery saver watch mode up to 65 days; both unlimited with solar |
| Water rating | Water-rated up to 10 ATM (Instinct 2 family, per the 2X Solar release) |
| MIL-STD-810 | Built to U.S. military standards (MIL-STD-810) for thermal shock, water resistance and shock (Instinct 2 family, per the 2X Solar release) |
What the 9.4 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- Garmin's table matches the current Instinct 3 Solar 45mm in smartwatch mode (28 days, unlimited with solar) and battery saver mode (65 days).
- Sold alongside the Instinct 3, so the price gap is real.
Good to know
No flashlight on the 45mm Instinct 2; the Instinct 3 added one to every size.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin Instinct 2 Solar (45mm)
The bottom line
Our recommendation
Buy this one
Garmin Instinct 3 Solar (50mm)
The only watch here rated unlimited in smartwatch mode; 260 GPS hours with solar.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin Instinct 3 Solar (50mm)
The runner-up
Garmin fenix 8 Solar (51mm, Sapphire)
48 days with solar, 653 max-battery hours with solar, sapphire, titanium, dive rating.
#ad · Price as of November 12, 2026 · Disclosure for the link to Garmin fenix 8 Solar (51mm, Sapphire)
How we scored this
What we checked to build this ranking
Every pick here is researched against the documents that decide whether a watch lasts: the maker's own battery table read mode by mode, what the lens and case are actually made of, the water rating, whether a MIL-STD-810 line is on the record and in whose words, and how long the maker keeps updating the line. Each one is then scored on a public rubric weighted for a decade of ownership, and every figure links to where it came from.
That is why the order on this page is worth following: it is built from specs you can open yourself, and commissions never set a score or decide a pick. The rubric and its weights are published.
Corrections & updates
- Corrected the Instinct 2 Solar 45mm row. It had been carrying the Instinct 2X column of Garmin's Instinct 2 Series battery table (40 days, 60 GPS hours, 145 with solar). The 45mm column reads 28 days and 30 GPS hours (48 with solar); the 2X figures now appear on their own row.
Questions
Frequently asked
Which GPS watch has solar charging?
Garmin's Instinct 3 Solar, Instinct 2 and 2X Solar, fenix 8 Solar (47 and 51mm), fenix 7 Pro Solar, Enduro 3 and tactix 8 Solar, plus select fenix 9 Pro models; Suunto's Vertical Titanium Solar. The AMOLED Garmins and the Suunto Vertical 2 do not.
Is solar charging on a GPS watch worth it?
Garmin's own tables say yes if you are outdoors: the Instinct 3 Solar 50mm goes from 40 days to unlimited and 60 to 260 GPS hours with three hours a day at 50,000 lux. Indoors, the gain is small.
What is the longest battery solar GPS watch?
In GPS mode, the Garmin Enduro 3 at 320 hours with solar. In smartwatch mode, the Instinct 3 Solar, rated unlimited with solar.
Keep reading
Related on Bezel & Bearing
- Best solar watches under $500The no-charger kind.
- Best solar watchesWith the Casios and the Citizen.
- Longest battery life GPS watchesSolar and non-solar together.
- Instinct 3 battery lifeThe full table.
- fenix 8 battery lifeThe full table.
- How long solar watches lastThe cell underneath.
- Vertical Solar vs Instinct 3 SolarThe two solar GPS watches most buyers compare, decided.
Receipts
Sources
- Garmin — Instinct 3 Solar Series Owner's Manual, Battery Life Information (checked 2026-09-20)
- Garmin — fenix 8 Series Owner's Manual, Battery Information (checked 2026-09-20)
- Garmin newsroom — Enduro 3 press release (checked 2026-09-20)
- Garmin newsroom — fenix 9 and fenix 9 Pro press release (checked 2026-09-20)
- Garmin — Instinct 2 Series Owner's Manual, Battery Life Information (checked 2026-09-20)
- Suunto — Vertical Titanium Solar Black product page and tech specs (checked 2026-09-20)
Battery, glass, case and water figures come from the maker's own owner's manuals, spec pages and press releases, linked on every product so you can open the page they came from. Prices are set by Amazon and change often, so each buy button takes you to the current one. Read the full method.