
PRC 100 Solar
User Guide

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What it is
Equipped with Lightmaster solar
technology, the Tissot PRC 100 Solar
captures both natural and artifcial light
and converts it into energy via discreet
honeycomb-shaped solar cells
embedded in the sapphire crystal
of the watch.
How it works
This energy powers the quartz
movement, and any surplus is stored in
a rechargeable accumulator, ensuring
long-lasting autonomy.
Autonomy
With regular exposure to light, the
watch will run continuously for years
without interruption.
What is Tissot
PRC 100 Solar?
TISSOT PRC 100 SOLAR
Invisible solar cells
Honeycomb structure
LIGHTMASTER SOLAR TECHNOLOGY

What is End of Energy Mode (EOE)?
TISSOT PRC 100 SOLAR
EOE mode informs the wearer
when it’s time to recharge.
Should the watch receive insufcient light,
the accumulator’s energy level gradually
decreases until the watch eventually stops.
EOE Mode cti¾ation
A few hours before stopping, the second
hand will begin moving in 4-second intervals,
indicating the need to expose the watch to
light (see exposure time below).
Normal Function
During EOE Mode
During EOE mode, the
watch continues to display
the correct time and date.
Return to Normal Operation
After returning to gormal mode teep
the watch exposed to light. ihis will
prevent returning to EOE mode or
stopping after a few hours.

In most cases, wearing the watch
regularly is enough to keep it running.
Howeverg certain situations may cause
the accumulator to discharge.
The watch is unused and
stored in a dark place for an
extended period.
The amount of light received is
insufcient te.g.g during winter
months when daylight is limited
and the watch is covered by
clothing such as shirts or jackets).
Note:
This reduces power consumption
and extends the time before
recharging is needed.
To restart the watch, set the
correct time and date, then
push the crown ba c k to its
operating position.
If you wonGt use the watch for a
long time, pull out the crown to
stop the mechanism.
When and How to
Charge the Watch?
TISSOT PRC 100 SOLAR
GRADUAL DISCHARGE MAY BE CAUSED BY: GRADUAL DISCHARGE MAY BE CAUSED BY:

5,000 lux
50,000 lux
Light Level (lux)
700 lux
2,000 lux
Typical Light Source
Strong indoor lighting
Moderate to direct daylight
Indirect daylight or very
bright artifcial light
Full sunlight
Real-World Example
Well-lit ofce, classroom
during the day
Outdoors on a cloudy
or shaded day
Near a window on a cloudy
day, photo studio lighting
Outdoors at midday in full sun
Light Intensity Levels Explained
TISSOT PRC 100 SOLAR
Note:
Up to 50,000 lux, the charging time is inversely proportional to the light intensity (e.g., exposure to 10,000 lux
requires about half the time compared to 5,000 lux to achieve the same charge level).

Charging Time Guidelines at 5,000 lux
TISSOT PRC 100 SOLAR
Note
PRC 100 Solar
39mm
Watch in EOE
mode or stopped
Condition
Model
Exposure time
80 minutes to return to
normal mode and run
for 24 hours in
darkness
With sufcient light, the watch can
exit the EOE mode in just a few
minutes. It is recommended to keep
exposing it afterward to achieve a
higher charge level to prevent the
watch from stopping again (e.g.
overnight)
Once fully charged, the watch can
run for 14 months in darkness (20
months with the crown pulled out)
If achieved by the end of summer,
this will allow the watch to run
through fall and winter without issue
10 minutes to run 24
hours in darkness
1 hour per day during 6
days max. to achieve
full accumulator charge
1 hour per day during
30 days max. to run 6
months in darkness
Watch operatin¨
in Normal mode
PRC 100 Solar
3
4
mm
Watch in EOE
mode or stopped
10 minutes to return to
normal mode and run
for 24 hours in
darkness
With sufcient light, the watch can
exit the EOE mode in just a few
minutes. It is recommended to keep
exposing it afterward to achieve a
higher charge level to prevent the
watch from stopping again (e.g.
overnight)
Once fully charged, the watch can
run for 14 months in darkness (20
months with the crown pulled out)
If achieved by the end of summer,
this will allow the watch to run
through fall and winter without issue
13 minutes to run 24
hours in darkness
1 hour per day during
9
0
days max. to achieve
full accumulator charge
1 hour per day during
40 days max. to run 6
months in darkness
Watch operatin¨
in Normal mode

2+1Y
2 years +1 year of additional
guarantee specially for
Lightmaster Solar Technology
Mll watches fttee with LIGSTMSSTR
Solar technology will automatically
beneft from yenrr tyrr o rrrranty
starting with the PRC 100 Solar.
Each watch will be delivered with a
printed card confrming the additional
1-year warranty on top of the standard
2-year international warranty.
Note:
This is applicable for standard
countries. If local laws require a
minimum duration longer than 2
years, the extension does not apply.
How Does
the Warranty
Work?
For more information check these links
Users manual
for analogue quartz watches
Tutorial video
Watch the video
