What to do with main dealer washing their hands

poppy10_2

WellKnownSid said:

Note you can jump start a hybrid or electric vehicle from any car (don't know about Tesla), but you cannot jump start an ICE car from a hybrid or EV, unless you want to shell out for a new 12v battery, DC/DC converter, etc.

Why  ?   .

WellKnownSid

poppy10_2 said:

WellKnownSid said:

Note you can jump start a hybrid or electric vehicle from any car (don't know about Tesla), but you cannot jump start an ICE car from a hybrid or EV, unless you want to shell out for a new 12v battery, DC/DC converter, etc.

Why  ?   .

ICEs need hundreds of amps to turn over the starter motor.  It's hugely inefficient - but it's cheap, tried and tested technology.

Hybrids and EVs don't have starter motors and hence the 12V system and battery just isn't designed for that.  If you're unlucky you could toast a lot of expensive equipment trying to pull 600 amps from an EV or Hybrid.

Ayr_Rage

poppy10_2 said:

WellKnownSid said:

Note you can jump start a hybrid or electric vehicle from any car (don't know about Tesla), but you cannot jump start an ICE car from a hybrid or EV, unless you want to shell out for a new 12v battery, DC/DC converter, etc.

Why  ?   .

Because the 12v system only provides power for the electronics and not the combustion engine starting system.

Toyota hybrids are started from the main HV traction battery, not the 12v system.

It is not designed to provide sufficient power to start a normal engine via jump leads.

victor2

I've started a Prius with a flat 12V battery from a battery charger. It provided enough to run the electronics necessary to put it into Ready mode. 

prettyandfluffy

badmemory said:

I was going to get a hybrid next time.  Whoops not going to be happening now as I can go days without using it.

I'm on my second hybrid* car.  Sometimes it isn't driven for several days or even a couple of weeks, I've never had a problem with the battery.  As well as shorter journeys my car does get used for longer trips sometimes which probably helps keep the battery fully charged.

*Honda Jazz hybrid, the first I bought used at about 35K miles; the current one I bought new.

subjecttocontract

When you guys are talking about 'hybrids' are you actually meaning PHEV's or are you including MHEV's as well ?

WellKnownSid

subjecttocontract said:

When you guys are talking about 'hybrids' are you actually meaning PHEV's or are you including MHEV's as well ?

HEVs, PHEVs and Electric Vehicles.  They all feature a traction battery (small, medium or large) and a small 12V system to power all the conventional 12V hardware - and, of course, enable the traction battery.

Mild hybrids (MHEVs) are essentially a conventional car with a 48V battery and motor / generator bolted.

photome

WellKnownSid said:

photome said:

WellKnownSid said:

For future reference, you don’t need to drive the car to top up the 12v battery, just sit in it and have it turned on (ready green) for 30 minutes. The DC/DC converter will charge the 12v battery from the HV battery and the HV battery will start the engine if that needs topping up.

My son is an apprentice for a main dealer and starting / collecting customers’ cars (often who are ill or elderly) with dead batteries due to car underuse is an every day event.

If the battery is flat the car won’t go in to ready mode 

at least my Corolla wouldn’t a few weeks ago. AA sorted it for me tho

As I say, for future reference and to avoid the 12v battery going flat in the first place - the advice was to drive the car around more, but there is no requirement to actually drive the car around to charge it up, all the owner has to do is sit in the car in Ready mode for 30 mins.

The 12v battery only has to power up a few computers and the HV contactor - but if it can't manage that then you need a jump.

Note you can jump start a hybrid or electric vehicle from any car (don't know about Tesla), but you cannot jump start an ICE car from a hybrid or EV, unless you want to shell out for a new 12v battery, DC/DC converter, etc.

Yes I agree, I thought you meant you could sit in the car in ready mode to charge the battery from flat. 

Once it is flat you need a jump start 

and yes I now know to avoid it going flat you need to have it in ready mode if you are sitting listening to radio etc

nologo

8000 miles a year is the  required distance to keep a hybrid battery happy, a standby time (vehicle not used) of 14 days is about the most I would l suggest,  I jump start about 10 a week.  I am a toyota tech, Just buy a cheap charger until you can use the car again, then take the car to the dealer, & have them charge & test the battery.(this should take all day) the warranty will not be applicable if the mileage is low.

photome

nologo said:

8000 miles a year is the  required distance to keep a hybrid battery happy, a standby time (vehicle not used) of 14 days is about the most I would l suggest,  I jump start about 10 a week.  I am a toyota tech, Just buy a cheap charger until you can use the car again, then take the car to the dealer, & have them charge & test the battery.(this should take all day) the warranty will not be applicable if the mileage is low.

Are you saying you can’t leave a Toyota hybrid in ( for example) an airport car park for longer than 14 days ?