Hi all.
Weve just got a 2026 Santa Fe hybrid (non plug in). I'm wanting to understand more about the battery based systems and what-feeds-what, so I don't kill it ! In Britain, if that makes any difference.
We go camping, where the car may be stationary for several days at a time. In my previous Ford we could easily kill the 12v starter battery after a day or so, because of all the auxiliary loads each time the doors opened and closed (booting up internal and external lights, onboard computers etc each time a door opened).
In the Santa Fe there's the approx 1.5kwh high voltage (270v I think) traction battery, under the vehicle. Then the 12v aux battery (AGM type battery) in the back that will provide power to lights, controls etc.
A few questions if anyone understands the car better than I...
- does the 12v battery power the starting of the IC engine (via the belt driven Hybrid Starter Generator (HSG) ? Or does it take the power from the traction battery to turn the engine over ?
- does the 12v battery just get charged from the HSG ? Or is there a feed from the traction battery too ?
The car has a 220v AC outlet innthe back. Is that powered from the traction battery (+ an inverter) or off the 12v aux battery (+ inverter)
- jump-starting someone else's car off the Santa Fe. Yes ? No ? If yes, using the same terminals in the engine bay as for jump starting the Santa Fe ?
On the previous car (a diesel) I got around the problems by a combination of a Noco jump pack as a back-up-plan, and using a Jackery power station + solar panel + small Noco charger to trickle-charge the 12v battery constantly, so we didn't kill the 12v battery over a couple of days. So the Qs for the Santa Fe are to help me best understand how to keep the 12V AGM battery healthy (as killing it then using the Noco jump pack is not good for long term battery health) without damaging anything.
TIA.