2020 TOYOTA PRIUS PLUG-IN HYBRID battery

1732-2. Charging
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
WARNING
●After connecting the charging cable, confirm that it is not wound around
anything.
● If the power indicator light does not illuminate after plugging the charging
cable into the socket-outlet, unplug it immediately.
■ If the error warning indicator on the CCID (Charging Circuit Interrupt-
ing Device) illuminates or flashes during charging
There may be an electrical leakage in t he power source path, or there may
be a malfunction in the charging cable or CCID (Charging Circuit Interrupt-
ing Device). Refer to P. 130 and follow the correction procedure. If the error
warning indicator does not turn off even after performing the correction pro-
cedure, immediately stop charging, remove the charging cable and contact
any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer. Continuing to charge the vehicle in that condition may lead to
unforeseen accidents or serious injury.
■ After charging
Remove the plug if it will not be used for a long time.
Dirt and dust may accumulate plug or socket, which could cause a malfunc-
tion or fire, possibly leading to death or serious injury.
■ Onboard traction battery charger
The onboard traction battery charger is located under the rear seats. Make
sure to observe the following precautions regarding the onboard traction
battery charger. Failure to observe these precautions may result in death or
serious injury such as burns and electric shocks.
● The onboard traction battery charger is hot during charging. Do not touch
the onboard traction battery charger, as doing so may result in burns.
● Do not disassemble, repair or modify the onboard traction battery charger.
When the onboard traction battery charger needs to be repaired, consult
any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
■ Charging inlet
Do not disassemble, repair or modify the charging inlet. It may lead to
unforeseen accidents or serious injury. When the charging inlet needs to be
repaired, consult any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.

1762-2. Charging
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Using the charging schedule function
When registering the charge schedule, the following settings can be
changed.
■Select the charging mode
One of the two following charging modes can be selected.
*1: Charging schedule function is performed in accordance with the clock in
the instrument cluster. Before registering the charge schedule, check the
clock settings to the proper time.
*2: There might be a slight error in the timing when charging starts due to the
state of the hybrid battery (traction battery).
■
Repeated setting
The periodic charging schedule can be set by selecting your
desired day of the week.
■Air conditioning-linked setting (“Climate Prep”) (if equipped)
When the charging mode is set to “Departure”, the vehicle air condi-
tioning system (P. 572) can be set to automatically operate
*
according to the set time.
By adjusting the cabin temperature in advance, passengers can enjoy a
pleasant interior immediately after entering the vehicle.
*: Operation starts approximately 10 minutes before the set departure time.
Charging can be carried out at the desired time by registering
the charge schedule. Also, it is possible to set the charging
schedule to one’s preferences, such as having charging com-
plete by a certain departure time or be carried out at the same
time on certain days.
Settings of the charging schedule function
Charging modeOperation description
“Start”Starts charging at the set time*1 and finishes
charging when fully charged.
*2
“Departure”
Starts charging to finish at the set time.
When this setting is selected, the air conditioning-
linked function can be used. (if equipped)

1782-2. Charging
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■When the charging cable remains connected to the vehicle
Even if multiple consecutive charge schedules are registered, the next
charge will not be carried out according to the charging schedule until the
charging cable is removed and reconnected after charging completes. Also,
when the hybrid battery (traction battery) is fully charged, charging according
to the charging schedule will not be carried out.
■“Climate Prep” (if equipped)
●When the air conditioning-linked setting is turned on, the air conditioning
operates until the set departure time. Therefore, the air conditioning will con-
sume electricity and charging may not complete by the set departure time.
●If the hybrid battery (traction battery) is fully charged, charging will not be
carried out, even if the charge schedule is set. However, if “Climate Prep” is
turned on, the air conditioning will operate only once when it nears the time
set in “Departure”. If this occurs, the air conditioning will consume electricity
and the remaining charge of the hybrid battery (traction battery) when
departing may be decreased.
●When the doors are unlocked, the air conditioning system does not operate.
■When charging schedules are ignored
When the following operations are performed while the charging schedule is
on standby, charging schedule is temporarily canceled and charging is
started.
●When the Remote Air Conditioning System (P. 585) is operated
●When turning “Charge Now” on (P. 184)
●When an operation that temporarily cancels charging using the charging
schedule is performed (P. 168)
■Effects of outside temperature
When the charging mode is set to “Departure”, charging schedule may be
ignored due to the outside temperature and charging may start.
■“Traction Battery Cooler” (if equipped) (P. 155)
When charging is carried out using the charging schedule, the hybrid battery
(traction battery) cooling function may operate according to the temperature
of the hybrid battery (traction battery).
●When the charging mode is set to “Start”, cooling starts at the set charging
start time.
●When the charging mode is set to “Departure”, cooling starts approximately
30 minutes before the charging start time. However, if there is no time to fin-
ish charging by the charging schedule, the hybrid battery (traction battery)
cooling time may be shortened and “Traction Battery Cooler” may not oper-
ate.

1872-2. Charging
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■When “Next Charging Event” is changed while charging
● When the charging mode is “Departure”, the current charging is interrupted
or continued depending on the remaining time until the charging is com-
pleted.
● When the charging mode is “Start”, the current charging is interrupted, the
next charging will start at the set time.
■ When the power switch is turned off
It is possible to check the next charge
schedule (“Next Charging Event”) by oper-
ating or of the meter control
switches while the power switch is turned
off and the “Ending” screen*1 ( P. 208) is
displayed.*2
*1: The “Ending” screen may not be dis-
played during charging.
*2: When the power switch is turned off, the “Next Charging Event” confir-
mation screen may be displayed.
WARNING
■ Cautions while performing the setting operation
When performing the setting operation while the hybrid system is operated,
ensure that the vehicle is parked in a place with adequate ventilation. In a
closed area such as a garage, exhaust gases including harmful carbon
monoxide (CO) may collect and enter the vehicle. This may lead to death or
a serious health hazard.
NOTICE
■ While performing the setting operation
When performing the setting operation while the hybrid system is stopped,
be careful that the 12-volt battery will not be discharged.

1882-2. Charging
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Solar charging system
This system generates solar power with the solar panel equipped to
the roof of the vehicle (solar roof).
●The hybrid battery (traction battery) is charged
* while parking.
After the solar power is stored in the solar battery, it is transferred
all at once to the hybrid battery (traction battery) to reduce the sys-
tem electrical consumption and charge the battery efficiently.
●The electrical consumption of the hybrid battery (traction battery) is
reduced during driving.
The electrical consumption of the hybrid battery (traction battery) is
suppressed increasing EV driving distance and fuel economy by
supplementing power consumption for the auxiliary systems using
solar power.
*: The maximum charge amount of the solar charging system is approxi-
mately 90% of the fully charged capacity for the charging from an external
power source.
: If equipped
A system that provides power to the hybrid battery (traction bat-
tery) and auxiliary systems by performing solar charging via the
large solar panel (solar roof) equipped on the vehicle roof.
Even when a parking lot does not have charging equipment and in
the event of a disaster, it is possible to charge
* the hybrid battery
(traction battery) without any special operations as long as sunlight
is available.
*: The charging amount via the solar charging system differs depending on
conditions, such as season and weather. Also, there is a limit on the
amount of charging possible per day. It requires at least approximately 10
days to charge to the maximum possible charging amount via the solar
charging system.
Solar charging system operation

1892-2. Charging
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
12-volt battery
Solar roof
Solar battery (inside console box)
Solar ECU
Hybrid battery (traction battery)
Information related to the solar
charging system can be checked
with (Drive information) on
the multi-information display.
(P. 235, 248)
Displaying information related to the solar charging system
1
2
3
4
5

1902-2. Charging
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Solar charging system
●In the following cases, charging the hybrid battery (traction battery) via the
solar charging system is not performed. Solar power generation stops when
the solar battery becomes fully charged.
• Charging via an external power source
• The power switch is not off
• The “Traction Battery Heater” is operating (P. 154)
• The Remote Air Conditioning System is operating
• When the amount of remaining charge in the hybrid battery (traction bat-
tery) is approximately 90% or more of the fully charged capacity for the
charging from an external power source
●In the following cases, the solar charging system stops solar power genera-
tion and power supply to the hybrid battery (traction battery) and auxiliary
systems.
• The temperature preservation function of the solar charging system oper-
ates
• There is a malfunction in the solar charging system
• When the 12-volt battery terminals are disconnected
●The amount of power generated by the solar roof differs according to the
season, climate, weather conditions, vehicle angle and surrounding condi-
tions.
●If even part of the solar roof is in the shade, there may be an extreme drop
in power generation.
●Please adhere to the following in order to allow full performance of the solar
roof.
• Clean the roof on a routine basis (Especially fallen leaves and bird drop-
pings can lead to a substantial decrease in power generation)
• Remove snow from the roof as soon as possible
• Do not attach any seals or stickers to the roof
It is recommended not to install a roof carrier etc. unless it is necessary
●When the hybrid battery (traction battery) is fully charged, charging the bat-
tery via the solar charging system is not performed. When it is not neces-
sary to perform charging from an external power source, charge the vehicle
as much as possible using the solar charging system during the day and
use the external power source only at night. As a result, the solar charging
system can be used effectively.
●When the vehicle is left in the hot weather, the temperature preservation
function of the solar charging system becomes easy to operate due to high
temperature of the vehicle interior. The solar charging system can be used
effectively by using a sunshade or parking the vehicle facing north, etc.

1912-2. Charging
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
■Solar battery
When the solar roof is not exposed to sunlight or the vehicle is not driven for a
long period of time, the solar battery may be discharged, negatively affecting
the system.
If storing the vehicle inside of a garage away from the sun or if the vehicle will
not be used for a long period of time, use one of the following methods to
charge the solar battery at least once every 2 to 3 months.
● Start the hybrid system and keep the READY indicator turned on for approx-
imately 60 minutes or more
● Park the vehicle outside of the garage so that the solar roof is in direct sun-
light for approximately 2 hours or more
(In this case, it is not necessary to start the hybrid system)
NOTICE
■ To protect the solar charging system from damage
● Make sure to observe the following precautions.
• Do not modify the solar roof
• Do not condense sunlight onto the solar roof
• Do not place anything on top of the solar roof
• Do not subject the solar roof to strong impacts or apply force with sharp
objects from the inside roof of the vehicle.
● If the solar roof is damaged, do not touch the damaged area and immedi-
ately request repairs from any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
■ If luggage is loaded on the roof
 P. 371