BrockN
Well-known member
- First Name
- Brock
- Joined
- Jan 1, 2025
- Threads
- 6
- Messages
- 354
- Reaction score
- 521
- Location
- Kamloops BC Canada
- Vehicles
- '24 FS Cybertruck, '23 MY, '15 MS
- Occupation
- Engineer
There are plenty of 48 volt nominal input buck converters on the market. That looks like it would be a reasonable one.Would this be the fix for the 48V?
I was given this link by Hookalakupia.
https://tsportline.com/collections/...-auxiliary-48v-to-12v-power-conversion-system
For most '12 Volt' car devices, you actually want around 13.8 Volts, because that's the voltage you typically see when an ICE vehicle is running. Most converters either actually output 13.8 Volts, or have an adjustment to set the output voltage that high. They'll also handle a range of input voltages, which is good, because the 48 Volt feed apparently floats around a fair bit... up into the mid-50 Volt range IIRC. I'm pedantic enough that I'd get them to provide the actual specs of their device before ordering it.
Each Cybertruck 48 V circuit is rated to a maximum of 400 Watts. So 350 Watts as advertised on that linked device would likely be fine. I'd want it to current limit before the Cybertruck feed did... but you likely aren't going to be powering anything too power-hungry... But...
... after saying all that, don't forget that the lightbar that was originally linked actually runs on 48 Volts! So you'd probably use the wireless switch to trigger a relay on the 48 Volt circuit to the lightbar. That means you'd only need enough power from the buck converter to run the wireless switching device and that relay. Very minor power in the scheme of things. This 48 Volt architecture thing can be a PITA...
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