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Is there a more user-friendly name for this? When I search our local equivalent of amazon / ebay nothing comes up for "crowbar circuit"

So I've had DC buck converters fail before and suddenly a fan is spinning a million RPM. So I have fuses (and breakers) in place to protect against too many amps / short circuits, is there something like this to protect against too many volts? I searched around some and all I find are devices...

Ah, I never intended to run a long line from the 24v; the 48v will run to the room where the 24v battery is; the battery will be near the laptop and other items it will power. Yeah voltage drop I get; I've spent a good amount of time doing calculations on cables and such to avoid this loss in...

Ah I understand now, thanks. If the MPPT will raise the voltage (to save on the voltage drop) then it probably needs to be on a separate line than other items drawing on my 48v battery right? I was planning to tap into an existing line. Right now, I'm leaning towards going with the "just...

Thanks guys! Yes this was my concern; regarding the 29v that was just a ballpark figure for sure I could lower it to whatever makes sense. I'll look into the MPPT controller solution; will the MPPT algorithm would gain anything over a cheaper PWM controller on a "constant" source like a 48v...

I'm running a 48v hybrid system to power my house (LiFePO4 500AH) I have an additional 24v LFP battery I'd like to use for a subsystem in 1 room. I'm no EE or electrician but I set up my home system myself (I can follow directions and do basic electronics things). Can I charge my 24v battery...