2015 Ford Fusion Hybrid battery questions

[ColoradoBlackMoon]

My 2015 Ford Fusion Hybrid SE at 39K miles in 2022 still works great @ 48 MPG.  But how does it work?  How is the 12V battery charged?  What are all the ways that the 300V hybrid battery is charged?  Please correct/confirm my understanding (I am an owner, not an automotive engineer):  I see no belt driven alternator and have read that a DC-DC converter powered by the hybrid battery is the only way that the 12v battery is charged (my 12v battery is original, 7 YO, seems to be doing fine).  My assumption is that the 300v hybrid battery is charged primarily by regenerative braking but perhaps is also charged by a motor/generator when the ICE is running (please confirm/correct).  Does anyone know, if a way was found to draw power from the 300V hybrid battery, for example to power my house during an outage, would the ICE automatically turn on and recharge the hybrid battery when it became drained below its spec?

 

Has anyone experienced the 8/9 year old hybrid battery issue documented by allen84 https://www.fordfusionforum.com/index.php?app=forums&module=forums&controller=topic&id=19361#comment-109237 for the lithium-ion 2015 version battery of the Ford Fusion Hybrid? What happens when the 2015 FFH hybrid battery entirely fails?  Will I be calling AAA to tow my vehicle, or will I be able to drive in ICE-only mode?  I have the Forscan app and OBD II adapter to plug into my car.  What test or attribute will tell me that the hybrid battery is failing and must be replaced soon?   I’m looking to decide if I want to replace the 2015 FFH hybrid battery before it fails, or trade up to a different EV/PHEV that satisfies the following goal:

I have recently implemented a 9.3KW LG collector Namaste-installed (Boulder, Colorado) grid-tied solar system. As my 2015 FFH does not currently implement any capability to plug-in to the grid, can I purchase a bi-directional charger and, when my original hybrid battery fails, can I purchase a larger capacity lithium-ion battery that allows bi-directional charging?  My end goal is to have a bi-directionally charged automotive hybrid battery that can power the micro-inverters in my solar system when the sun is out/car-in-garage and power the drive motors of its EV/PHEV when out-of-garage.   The F-150 Lightning looks like a good future choice for me (as I already like my 2013 Ford F-150 4x4 Supercrew Turbo-boost) but I don’t currently own a F-150 Lightning and would rather wait a few years to buy one.

[Waldo]

The Fusion Hybrid will never ever be the right vehicle for your goal.  The battery capacity is very small compared to PHEVs/EVs and would probably charge your house for about 15 minutes before the gas engine would kick on and stay on until you run out of gas.  Far more efficient to just buy a gas generator.

 

You're contemplation about failure of the battery in your car is also irrelevant.  It's not going to "entirely fail", it's not going to have the same issue as the previous gen that you reference and spending the money to replace it with something else like the one in the PHEV Fusion will never cost less than just going out and buying a PHEV Fusion (or something else).

 

Lot's of Youtube videos out there on how hybrid vehicles work, the Fusion is basically the same as a Prius.  But the basic concept of a hybrid is to allow the gas engine to operate in it's most efficient range, not to be an electric car that has a range-extending gas engine.