Update on the relay-as-a-power-switch plan: Found a better relay.
I cooked a few of the SSR DD100 relays. They have enough “on resistance” that they need to dissipate a lot of heat when you’re really running the thrusters hard. With only the battery in the bottle and the relay snug against it, that’s not a great situation.
I’ve switched out the boxed relays for a lower resistance switch from thornwave labs and had no problems since.
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