Lifepo4 and lead-acid - common ground?

Submitted: Wednesday, Feb 07, 2024 at 11:48
ThreadID: 146915 Views:3390 Replies:5 FollowUps:6
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Hi campers. I've upgraded the house battery in my camper van to a 200Ah Lifepo4, but I'm retaining the dual lead-acid batteries for the van accessories and starter. I have one question left to answer about the setup before I finalise the connections and flip the switches.

Can I connect lithium and lead-acid to a common ground (chassis/body)?

I feel like I've spent forever scouring threads for a straight answer to this one, but every thread I find on the topic usually devolves into a discussion/argument about earth cable size (or something along those lines) by the second or third reply, and nobody ever seems to answer the question. Based on that, please assume that my setup is the most spectacularly put together world class wiring job, connecting the finest components ever conceived by man. The connection points I'll be using have been personally approved by every one of the Gods, and my van's body is forged from a single piece of the purest copper. Every part of the system puts out or uses exactly the same Volts and Amps, and the Gods (they've been really helpful) blessed the whole setup with zero resistance, anywhere...

I just need to know, can I have lead-acid batteries and a lifepo4 battery connected to a common ground?

Thanks in advance.
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