We don't talk a lot about electrical stuff here, but we probably should. A couple of months ago there was an on-airport engine-out crash landing of an LS V8 powered P51 replica in CA, and a subsequent discussion on the HBA forum with the non-builder, non-flying owner asking what could have gone wrong. He could offer almost no info about the way the plane was set up, but Eliot Seguin was doing what was supposed to be a simple flying off of the insurance company-dictated 5 hours flight time when the failure happened, and he just  posted a long Youtube video on the flight and accident sequence.
https://www.youtube.com/watch?v=4PHTVTw_Y2A
I found the video very hard to watch due to the visual edit cuts every second or two, but the after-action analysis is worth the hour you'll spend watching.

Guys, the builder of that a/c seemed to find every possible way to make the electrical system failure-prone. Seguin describes the elaborate steps they took prior to him flying the a/c to inspect the airframe, but they apparently totally ignored the electrical system. Because of that, the choices the builder made almost certainly caused the original gear issue, and then caused the total electrical failure that took out everything in the a/c, including the engine. There is no justification for wiring an a/c the way this one was wired.

With most of us running automotive style engine control, electricity is obviously quite critical to engine operation. We really should do Failure Mode Effects Analysis on the whole plane, including the electrical system, but with electrically dependent engines, it's critical. Draw your schematic. Look at *every single wire*. Pretend that it got broken, and ask what happens, and then ask what plan you have in place to work around it. Then short it to ground, and ask the same questions. (You can get very different effects.) Move to the next wire, and do it again. Rinse; repeat. Then fail each component and ask the questions.

Don't let any one electrical issue cause the engine to stop, or cause more than momentary distraction from normal flight. Most of us know about the Aeroelectric Connection email list, but if you don't, please sign up for the list and get the book (relatively inexpensive in print; free for download). If you're not absolutely confident in your electrical design decisions (or maybe even if you are), get peer review. The AEC list is best, but at least ask here if you don't want to sign up over there. There are a *lot* of wrong ways to wire an a/c.

I hate it that the FAA's accident database will now show yet another crash 'caused' by an alternative engine, when in fact it was caused by uninformed/bad electrical design decisions made by the builder.

OK, rant mode off...

Charlie