The consensus is that leaving a hybrid with nickel-metal-hydride batteries such as yours stored for three months should be okay, but four-five months might be pressing it a bit. With the car shut off, there is no parasitic drain on the main battery so it will retain a charge for a long time.
Do hybrid cars need to be driven regularly?
A hybrid vehicle cannot run without the hybrid battery, so vehicle owners must invest in new hybrid batteries periodically, which can make vehicle maintenance expensive.
How long can car sit without being driven?
How long can you leave a Prius without starting it?
If your Prius is equipt with the smart key system (sks) and it is left on it’s possible to drain the small 12v battery after 2-3 weeks.. though others have reported no issues after as long as a month of leaving it unused. If you will be leaving the Prius for more than 2 weeks there are a few things you can/should do.
What is the downside of a hybrid car?
Disadvantages of Hybrid Cars – 02 – Hybrid Cars Are Heavier
Gasoline / electric drivetrains usually tip the scales heavier than their gas-only counterparts, due to the fact that an electric motor, battery pack, regenerative braking system, and associated cooling systems are all part and parcel of the hybrid design.