Toyota Prius, Manual

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113
1-2. Charging
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PRIUS PHV_OM_OM47831E_(EE)
 Charging time may increase
In the following situations, charging time may become longer than normal:
 In very hot or very cold temperatures.
 The vehicle is consuming a lot of electricity, for example, when the head-
lights or emergency flashers switch is on.
 There is a power outage during charging.
 There is an interruption in the electrical supply.
 There is a drop in the voltage of your panel’s AC supply.
 The charge in the 12-volt battery is low, for example due to the vehicle
being left unused for a long period of time.
 Capacity reduction of the hybrid battery (traction battery)
The charge of the hybrid battery (traction battery) will decline gradually when
the hybrid battery (traction battery) is in use. The rate at which it declines will
differ in accordance with environmental conditions and the way in which the
vehicle is used. By observing the following precautions, battery charge
decline can be suppressed.
 Avoid parking the vehicle in areas with a high temperature under direct
sunlight when the hybrid battery (traction battery) is fully charged.
 Do not accelerate or decelerate frequently and suddenly when driving in
EV mode.
 Avoid frequent driving near the top speed for EV driving. (

P. 57)
 Leave a low level of charge in the hybrid battery (traction battery) when
leaving the vehicle undriven for a long period of time.
After confirming that EV mode has switched to HV mode, turn the
“POWER” switch off.
 Use the charging timer function as much as possible in order to fully
charge the hybrid battery (traction battery) immediately before starting
off.
Also, if the hybrid battery (traction battery) capacity reduces, the EV driving
range decreases. However, vehicle performance does not significantly
become worse.