Guide · movements

Automatic vs solar vs quartz: which should you choose?

Quartz is the most accurate and the cheapest to run: a battery every 2 to 5 years, drift of about 15 seconds a month (high-accuracy quartz manages about 10 seconds a year). Solar is quartz without the battery change; the rechargeable cell is rated for well over a decade. An automatic is a mechanical movement wound by your wrist: least accurate (up to ±30 s/day), needs a service every 5 to 10 years, and is bought for the mechanism rather than the timekeeping. Our point table scores a modern automatic at 30, solar at 24 and basic quartz at 14, because that is roughly what the market charges for each.

By Alex D. · updated November 3, 2026 · first published November 2, 2026 · prices as of November 3, 2026, 18:15 UTC

Side by side

Quartz (battery)Solar quartzAutomatic (mechanical)
Typical accuracy±15 s / month; HAQ ±10 s / year±15 s / month; radio-sync models exact−35 to +45 s / day spec; ±15 typical
Running costBattery every 2–5 years, $10–$30 fittedNone for 10+ years; cell replacement after thatService every 5–10 years, $150–$500
Off the wristKeeps runningKeeps running for months in the darkStops after 40–80 hours
Shock toleranceHighHighModerate; magnetism also affects it
Seconds handTicks once a secondTicks once a secondSweeps (6–8 beats per second)
Why people buy itPrice, accuracy, no fussNo routine battery changeCraft, sweep, display caseback, tradition
Spec points (our table)14 (HAQ: 22)24 (digital: 20)30 (24 without hacking/hand-winding)

Automatic vs solar: which should you choose?

This is the pair people actually weigh, because both avoid the battery drawer. Choose solar if the watch must simply work: it is accurate to the minute per year, shrugs off knocks, keeps running for months in a drawer and costs nothing to run for over a decade. Choose automatic if you want the mechanism: a sweeping seconds hand, a movement you can watch through the caseback, hand-winding on a Sunday morning, and the knowledge that it can be serviced for decades. Solar wins every practical column; automatic wins the only one that makes people pick up the watch.

SolarAutomatic
PowerLight; cell rated 10+ yearsWrist motion or hand-winding; stops in 40–80 h
AccuracyAbout a minute a yearAbout a minute a week
MaintenanceCell swap after a decade or more, $30–$80Service every 5–10 years, $150–$500
DurabilityFew moving parts; shock and magnet tolerantBalance wheel dislikes hard knocks and magnets
CollectabilityLow; the module is a commodityHigh; movements are discussed, modified, serviced
Price for the same case and crystalLowerTypically 1.5–3× more
Best examples hereCitizen Promaster Dive BN0151-09L, Seiko Prospex Solar Diver SNE597Seiko 5 Sports SRPD55, Orient Kamasu RA-AA0001B

Where each one wins on Amazon today

Quartz is where the hardware-per-dollar extremes live: Casio Duro MDV106-1A ($67.88) gives you 200 m, a screw-down crown and a rotating bezel; Casio MTP-1302D-7A2 ($55.02) is a 9 mm dress watch on a bracelet. Swiss quartz, Tissot PRX 40 Quartz Blue T137.410.11.041.00 at $450.00, buys sapphire, Swiss assembly and design, not better timekeeping.

Solar is Citizen's and Seiko's territory. Citizen Promaster Dive BN0151-09L ($337.50) is an ISO-certified 200 m diver with a five-year warranty and nothing to replace; Citizen Garrison BM8475-00F ($186.95) is the field version. The 2 solar divers we track have a median price of $528. Ranking →

Automatic starts around $88.00 for the best-value diver today (Invicta Pro Diver 8926OB) and around $161.08 for the best-value dress watch (Timex Marlin Hand-Wound 34 TW2W44500). Expect to pay 2 to 4 times the equivalent quartz for the same case and crystal, and to accept worse timekeeping for it. First automatic guide → · Best value automatics →

High-accuracy quartz and radio sync

Bulova's 262 kHz Precisionist (Bulova Lunar Pilot 45 mm 96B251, Bulova Precisionist 96B158) runs at eight times the frequency of ordinary quartz and is specified by Bulova at about 10 seconds a year, with a smoothly sweeping seconds hand. Casio's Multi-Band 6 G-Shocks (Casio G-Shock GW-M5610U-1) sync to a radio time signal nightly and are effectively exact. We give HAQ 22 points, above basic quartz and below a modern automatic, because buyers pay for it but not at mechanical prices.

FAQ

Which lasts longer, a solar or an automatic watch?
Serviced, an automatic lasts indefinitely; movements from the 1960s still run. A solar watch's rechargeable cell is rated for well over ten years and can be replaced, but the module itself is a commodity that is eventually replaced rather than repaired. For a watch to hand down, automatic; for a watch to forget about, solar.
Is a solar watch more expensive than an automatic?
Usually less. For the same case, crystal and water resistance an automatic typically costs 1.5 to 3 times more; the Citizen Promaster solar diver and the Orient Kamasu automatic diver sit a step apart in price with comparable hardware.
Do solar watch batteries need replacing?
Eventually, yes: the rechargeable cell degrades after a decade or more and a watchmaker swaps it for $30 to $80. "No battery, ever" is marketing; "no routine battery change" is the truth.
Do solar watches work indoors?
Yes. Office lighting charges them slowly but enough for daily wear; a few hours of daylight a week keeps a full reserve. A solar watch left in a drawer for a year may stop and need a day in a window to restart.
Is an automatic worth the service cost?
Financially, rarely: two services on an entry-level Seiko cost roughly what the watch did. People service watches they are attached to and replace the ones they are not. Buy the automatic for the mechanism and treat the service as the price of the hobby.
Why do G-Shocks score like basic quartz?
Because their module is ordinary quartz; the value in a G-Shock is the case (200 m, shock resistance), which the table scores through water resistance. Solar G-Shocks score 20 for the movement; radio sync is not scored because only Casio offers it in this price range and it would reorder the group by brand rather than by hardware.
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