The Deep Blue DayNight Diver PC Solar is that rare dive watch that solves two problems at once: it never needs a battery change thanks to solar charging, and it never needs a light source to read the time thanks to 17 tritium gas tubes that glow 24/7 for the next 10–15 years. All of this comes wrapped in an ultra-lightweight 45 mm polycarbonate case, protected by sapphire crystal and rated to 200 meters — at an almost unbelievable street price of $179.98.
The polycarbonate case is the secret sauce. It drops the weight to roughly half that of a steel diver while still delivering legitimate 200 m water resistance and a rock-solid feel. At 51 mm lug-to-lug, the watch wears much smaller than the 45 mm diameter suggests — even average wrists will find it comfortable all day.
My Take-
Here’s my take on the Deep Blue Daynight Solar, after living with it for months on my wrist.This one sees more wrist time than almost anything else I own – yes, even more than my NITEs or my Marathons. Deep Blue absolutely crushed it with this model.
It’s ridiculously light for something that looks and feels so substantial, and the legibility is on another level. Day or night, it’s the clearest tritium watch I’ve ever worn, bar none. The secret is the hands – big, bold, perfectly shaped, and filled with just the right amount of tubes. At 3 a.m. when I’m half-blind and reaching for my glasses because of my astigmatism and far-sightedness, this is the one watch I can actually read instantly. Throw in the multi-colored markers and that gorgeous layered dial, and it’s not just functional – it’s legitimately beautiful. Easily one of my top three favorite watches, period.
Out of the box it has that immediate “tool watch done right” vibe. The polycarbonate case looks purposeful, almost tactical, but the finishing is surprisingly clean and refined. It has real presence without ever feeling heavy or clunky on the wrist. I threw mine on a NATO strap right away (functional over fancy, as it should be), and it wears like it was made for it.
Something I find really cool is the arrangement of the solar cell. It’s not a flat beneath the dial as you would expect, but is cylindrical in shape, and surrounds the dial . It sits between the dial and the raised section where the tritium markers are set. Very innovative!
The sapphire crystal is crazy clear with solid AR coating, and with serious water resistance, this thing is built to be worn hard – even though, like all my watches, it still gets babied a little. At night? It lights up like a torch. The depth of the dial, the proportions, the way everything just works together – it’s stunning. Hands-down one of the best tritium divers I’ve ever owned. And the bonus of course, is it’s solar power!
Most brands charge $500–$1,000+ for a package even close to this.
Read my review of this watch on our sister-site tritiumlume.com, focusing more on the Tritium aspect of this solar-powered diver.
DeepBlue has authorized me to offer this coupon code-
‘tritiumlume‘ to save 10% on your next purchase!
The Deep Blue DayNight Diver PC Solar Quartz is the ultimate “set it and forget it” dive watch: solar power means no battery ever, tritium means perfect legibility forever, and the featherlight case means you’ll actually want to wear it every day.
If you’ve ever wanted a true no-maintenance tool watch that glows like a torch in the dark and runs on sunlight alone, this is it.
Grab it while the $179.98 deal is live → https://www.deepbluewatches.com/dadipctrauwa.html
Solar Movement
Under the dial sits the proven Epson VS22 solar quartz movement:
- Full charge in ~4 hours of sunlight or ~20 hours indoors
- 8-month power reserve once topped off
- Low-power warning (2-second jumps)
- ±15 sec/month accuracy
Charge it once in bright summer light, and you’re covered for most of a year — even if the watch lives in a drawer.
Now add some Tritium: The Best of Both Worlds
Here’s where this watch becomes addictive. While the solar movement keeps it running forever, the 17 tritium gas tubes—with a total T100 capacity—keep it readable forever, with zero need to “charge” the lume.
- Two stacked yellow tritium tubes at 12 o’clock create an unmistakable reference point
- Blue tritium tubes mark the remaining hours
- Yellow tritium fills the hour, minute, and second hands
- Yellow Tritium pip on the bezel for dive timing
The result is a soft, constant green-blue glow that’s visible the instant you look at the watch, day or night, no flashlight required. In complete darkness, the dial lights up like a cockpit instrument — bright enough to read easily, yet gentle enough not to disturb night vision.
Very few solar watches offer genuine constant-on illumination. Deep Blue somehow delivers both solar power and real tritium at under $200.
Specifications Table
Feature | Details |
|---|---|
Model | DayNight Diver PC Solar Quartz (DADIPCTRAUWA) |
Case Material | High-grade lightweight polycarbonate |
Case Size | 45 mm × 14 mm thick × 51 mm lug-to-lug × 22 mm lugs |
Movement | Epson VS22 solar quartz (8-month power reserve when fully charged) |
Crystal | Flat sapphire with inner AR coating |
Bezel | Unidirectional 60-click, black/white insert with yellow tritium pip |
Lume | 17 × tritium gas tubes (constant glow, no charging required; T100 total capacity) |
Dial Details | Two stacked yellow tritium tubes at 12, single blue tubes for the hours, and yellow tritium on hands |
Water Resistance | 200 meters (660 ft) |
Crown | Screw-down |
Strap | Blue ventilated rubber with quick-release pins |
Weight | ~85 g on strap (extremely light) |
Price | $179.98 USD (current promotion) |
The factory blue rubber strap is soft, ventilated, and equipped with quick-release spring bars. Total weight on wrist is barely noticeable — you’ll regularly forget you’re wearing a 45 mm dive watch.
At around $180, you get:
- Lifetime solar quartz movement
- 17 tritium gas tubes (constant glow, T100 capacity)
- Sapphire crystal
- 200 m WR
- Ultra-light polycarbonate case
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