![]() | Home > General (L405) > Hybrid Battery Status |
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| 4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 454
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With regards to the battery failing, will the car still run - yes; but not for long as the HV battery charges the 12v battery as there is no alternator. L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division. |
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| Ffos-y-ffin Member Since: 21 Dec 2024 Location: Aberaeron Posts: 12 |
Actually there is a great big alternator that doubles as a motor for stop/starting and giving a small amount of extra oomph when accelerating from idle speed. How else would any battery be charged if not for the alternator? |
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| 4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 454
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As far as I am aware (and stand to be corrected), it's not a normal alternator but a generator coupled to a DC-DC convertor to charge the HV battery and if the HV battery fails then the 12v battery will discharge and you'll be stranded. L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division. |
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| Ffos-y-ffin Member Since: 21 Dec 2024 Location: Aberaeron Posts: 12 |
Its an alternator but not as you know it captain. All alternators rectify to charge DC batteries. The difference with these is that they are also motors and do charge at 48V |
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| simonmj Member Since: 23 Oct 2025 Location: Burgendy Posts: 2
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so fundamentally if the hybrid battery fails, then the car wont start (unless you jump it) The LR warranty seems to be only 6 years for hybrid battery. which is probably why these are dropping in price.
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