I am designing a project that will require about two dozen smallish electromagnets (larger than in a relay but much smaller than used to activate car door locks). They will be powered by a battery bank in an RV, so 12 vdc and the equivalent of about 4-8 car batteries in parallel. I have not chosen the electromagnets yet, so part of what I am deciding is what voltage rating to look for.
I used to be an electronics technician in the USMC, but all my work was in low-voltage signal shaping, where power use played almost no part in the way the circuits worked. I assume the serial vs parallel math is different when powering electromagnets is involved.
Here's the question: Would I be better off arranging these electromagnets in series or parallel? Would the actual current coming out of the batteries change much at all when the electromagnets are doing the same amount of total work either way?
By the way: These will only be in operation for about a second, every day or so. They are to release catches that hold things closed.
Naturally, parallel will be better for later troubleshooting. Should I just get 24 12vdc electromagnets, arrange them in parallel, calculate the total current, size my wire accordingly, and consider it done? Are there any other concerns I need to consider?