If I were to install a 110v outlet through an inverter, hooked to the battery, how quickly am I gonna drain the 12v battery while the car is parked and the inverter is powering some heavy use items? The car would most likely not display is was turned to ‘on’ because I wouldn’t be sitting in the driver seat with my foot hitting the brake to power on the gear selector- yet does the car automagically charge the 12v even when it’s sitting by itself in park/ non driving mode?
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How does the 12v battery charge?
- Thread starter selfbp
- Start date
It does, depending on the power saving mode and what's going on otherwise.
I don't know all the details, but it seems like with power saving turned on it may check in on the 12V and charge it if needed on a periodic basis.
If I was in a situation where I needed to run an inverter off of the car for an extended period, I'd probably use the preconditioning or "keep climate on" settings with the fan at minimum and the temperature as close to ambient as I could get, which would make sure the car stayed awake and charging the 12V.
I think I remember seeing the 12V being 35Ah a while back?- it won't take long to drain it with higher power items.
I'm not sure how powerful the dc-dc converter is, either, or what cooling it has. Extended use of the inverter at high power levels might overheat the dc dc converter or simply draw faster than it can fill, draining the 12V despite the car's best efforts.
I don't know all the details, but it seems like with power saving turned on it may check in on the 12V and charge it if needed on a periodic basis.
If I was in a situation where I needed to run an inverter off of the car for an extended period, I'd probably use the preconditioning or "keep climate on" settings with the fan at minimum and the temperature as close to ambient as I could get, which would make sure the car stayed awake and charging the 12V.
I think I remember seeing the 12V being 35Ah a while back?- it won't take long to drain it with higher power items.
I'm not sure how powerful the dc-dc converter is, either, or what cooling it has. Extended use of the inverter at high power levels might overheat the dc dc converter or simply draw faster than it can fill, draining the 12V despite the car's best efforts.
@selfbp
Quite a long current discussion of this going on. Search is your friend.
Is it safe to connect a large inverter to the 12V battery?
Quite a long current discussion of this going on. Search is your friend.
Is it safe to connect a large inverter to the 12V battery?
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I wanted to charge a little remote control airplane battery at the field with a charger your normally use a car battery to charge the battery. I understand you can have access to the 12v via the tow hook cover but dies this 12v battery get charged automatically? Will I end up draining the battery if I were use this system to charge up these batteries throughout the year?
I've had a 12V fridge in the car running with the car parked and unplugged for a couple days on a few occasions with no problems. I think the algorithms managing the SoC of the 12V battery are smart enough to adjust to extra loads on the 12V. You should be fine.
Thank you! Just curious, when does this 12V get charged? (Car running/on the charger?)
Whenever the car feels like it. The computers are always somewhat awake, and the car presumably uses the SoC of the 12V battery to decide when to recharge it, but I've never seen any data on that. I don't think it's a fixed interval.
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