Wont start is the battery dead in a hybrid - 2009 Chrysler Aspen Hybrid

Sorry I know nothing about them other than the warnings I read in the trade press about working on hybrids and the main advice is don't!
Basically, they are more wheeled self-propelled computer than traditional car and it can be dangerous to work on them without following the safety precautions to the letter and there is little that can be done without dedicated diagnostic equipment and lots of knowledge...

Good luck!

No! There is a seperate battery just for starting, check alternator is charging ok!

Have you checked the 12 volt battery under the hood? If it's low it won't activate the hybrid system and the engine won't turn over at all.

the aux battery is bad its uder the hood the generator does start the gas engine but you left the dome light on or something like that it will not turn on or switch to ready mode

Try to engage the parking break and then start. Not likely a battery issue with the onboard 300 volt battery.
If the car has been at an unusual angle while in park the parking break is required to start.

the battery for the vehicle likely dead, check the owners manual, you may need to remove the safety switch from the hi volt battery in order to boost it,.

the altornator might have got out

YOU SHOULD BE UNDER WARRANTY, CALL ROADSIDE SERVICE TO GET HELP. DON'T TRY JUMPING THE BATTERY YOU CAN CAUSE DAMAGE TO OTHER SYSTEMS IF DONE WRONG. THE ENGINE DOSEN'T HAVE A STARTER ON IT ANYWAY.

I have the same problem with my 2007 Escape Hybrid... First experienced it about 1 year ago. The vehicle produces periodic sounds like an electric motor running for several seconds. I believe this is from the motor driven safety relay that disconnects and reconnects the high voltage hybrid battery when the vehicle is not in use. I also can hear a high frequency scream that sounds like a switching inverter power supply. If the vehicle is unused for a day or two the 12V battery is discharged and a jump is needed to start the engine. Ford service could not diagnose the problem. The +12V battery tested OK, but since it was almost 3 years old it was replaced anyway. This helped for a while, but the problem returned after I recently left the vehicle unused for several days. I know the battery is good, it tests OK and is less than one year old! Somewhat reluctant to go back to the same Ford service agency because of their previous failure to fix it. Please advise if you have found a solution or have additional information. This is the only problem I have ever had with the hybrid Escape, but it is very annoying. I am forced to carry a jumper battery to make sure I don't get stranded.