will i damage my car electrical system with a 24v solar panel (reddthat.com)

submitted 4 months ago by batvin123@reddthat.com to c/askelectronics@discuss.tchncs.de

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I have a 3d printer in my car powered by a bluetti eb3a. The bluetti is charged by the 12v outlet in my car while driving. I have a 24v solar panel i want to mount to the roof of the car. My bluetti has only one dc 7909 input. So got a a Y splitter to combine power from the car and panel. But when plug it into the car outlet that turns off when i turn off the car, the solar panel turns on the stereo. Thats not the case with the outlets that are always on. I am worried that i will danage the car electrical system from a 24v solar panel flowing electricity back into the car?

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[-] cmnybo@discuss.tchncs.de 6 points 4 months ago

The solar panel needs to be used with a charge controller. Connecting it directly to a battery will overcharge and damage the battery. Charge controllers typically don't like the battery being disconnected while the solar panel is still connected, so don't connect it to a switched outlet.

this post was submitted on 17 Jun 2024

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