2020 TOYOTA PRIUS PLUG-IN HYBRID auxiliary battery

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

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.

2012-2. Charging
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
If “Charging Stopped High Energy Use See Owner’s Manual” is shown
Power is being consumed by
electrical components of
vehicle
Check the following items, and then carry
out charging again.
• If the headlights and audio are turned on,
turn them off.
• Turn the power switch off.
If charging cannot be carried out, even after
performing the above, the auxiliary battery
may not be sufficiently charged. Operate
the hybrid system for approximately 15 min-
utes or more to charge the auxiliary battery.
If “Charging System Malfunction See Owner’s Manual” is shown
Malfunction occurred in
charging systemHave the vehicle inspected by any autho-
rized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
Likely causeCorrection procedure

799Alphabetical index
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Antenna
Smart entry & start system.... 293
Anti-lock brake system
(ABS) ...................................... 559
Function ................................ 559
Warning light ......................... 715
Approach warning ................... 461
Armrest ..................................... 613
Assist grips .............................. 614
Audio input
*
Audio system*
Automatic air conditioning
system .................................... 572
Air conditioning filter.............. 681
Automatic air conditioning
system ................................ 572
Blower customization ............ 576
Eco score (A/C score) ........... 254
Front seat concentrated
airflow mode (S-FLOW)...... 575
Humidity sensor .................... 584
Remote Air Conditioning
System................................ 585
Automatic headlight leveling
system .................................... 389
Automatic light control
system .................................... 388
AUX port
*
Auxiliary boxes ........................ 598
Back door ................................. 288
Back-up light ............................ 695
Replacing light bulbs ............. 696
Wattage................................. 779Battery (12-volt battery) .......... 644
Battery checking ................... 644
Exchanging ........................... 758
If the 12-volt battery is
discharged .......................... 755
Preparing and checking
before winter....................... 566
Replacing .............................. 758
Warning light ......................... 714
Battery (traction battery)......... 108
Air intake vent ....................... 109
Charging ............................... 121
Location ................................ 108
Specification ......................... 773
Status indicator ..................... 123
Blind Spot Monitor (BSM) ....... 473
Blind Spot Monitor function ... 489
Rear Crossing Traffic Alert
function ............................... 493
Bluetooth
®*
Bottle holders .......................... 597
Brake
Fluid ...................................... 778
Parking brake........................ 386
Regenerative braking............ 103
Warning light ......................... 714
Brake assist ............................. 559
Brake Override System ........... 360
Break-in tips ............................. 361
Brightness control
Instrument cluster light
control................................. 206
BSM (Blind Spot Monitor) ....... 473
Blind Spot Monitor function ... 489
Rear Crossing Traffic Alert
function ............................... 493
B
*: Refer to “Navigation system Owner’s manual”.

806Alphabetical index
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Jack ........................................... 670
Positioning a floor jack .......... 636
Vehicle-equipped jack ........... 670
Jack handle .............................. 670
Jam protection function .......... 353
Keyless entry ........................... 283
Smart entry & start system.... 293
Wireless remote control ........ 283
Keys .......................................... 278
Battery-saving function ......... 295
Electronic key........................ 278
Engine switch ........................ 373
If the electronic key does not
operate properly ................. 751
If you lose your keys ..... 279, 282
Key number plate .................. 278
Keyless entry ........................ 283
Mechanical key ..................... 279
Power switch ......................... 373
Replacing the battery ............ 688
Smart entry & start system.... 293
Warning buzzer ..................... 294
Wireless remote control ........ 278
Knee airbags .............................. 39
Language (multi-information
display) ................................... 260Lever
Auxiliary catch lever .............. 634
Hood lock release lever ........ 634
Shift lever .............................. 379
Tilt and telescopic steering
lock release lever ............... 346
Turn signal lever ................... 385
Wiper lever............................ 398
License plate lights ................. 387
Light switch ........................... 387
Replacing light bulbs............. 700
Light
AHS (Adaptive High-beam
System) .............................. 391
Door courtesy lights .............. 591
Emergency flasher switch ..... 704
Fog light switch ..................... 397
Follow me home system ....... 388
Headlight switch.................... 387
Illuminated entry system ....... 593
Interior lights ................. 592, 593
Interior light list...................... 591
Luggage compartment
light..................................... 289
Personal lights ...................... 592
Replacing light bulbs............. 695
Shift lever light ...................... 591
Turn signal lever ................... 385
Vanity lights .......................... 605
Wattage ................................ 779
Light bulbs
Replacing .............................. 695
Wattage ................................ 779
LTA (Lane Tracing Assist) ...... 429
Luggage cover ......................... 603
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