A pair of Tyco Kilovac contactors will provide excellent reliability. Yes, they're rated at 500a, but the other features are the real selling points. Hermitically sealed, blow-out magnets to keep contacts clean, tin plated studs, and the power-saver feature that keeps the coil energized with 110mA ensures cool operation. Gigavac makes even better ones with integral safety covers. Allied Electronics for Tycos, Gigavac sells direct.
Be aware of "bro" deals on contactors. Pay once for the good stuff... If it keeps you out of just one failure-under-full-power, it's paid for itself. Open frame contactors with copper studs are designed for warehouse forklifts, not marine applications!
Cheap junk often leads to sad stories...
Be Well,
Be Well,
Arby
I am currently using two battery banks for a 48V system. I have the traditional "1, 2, both, off" selector switch.It's a tempting thought to install contactors (relays) so that I can have a small, low voltage 'control' panel where the switches are located. Part of me is trying to resist the urge. It adds more complexity, more opportunities for things to break or "go wrong".If I install contactors to switch the battery banks on and off, what is a good source? If my typical load is expected to be 25-40A, do I need to get at least a 80-100A contactor / relay, or is it safe to use a relay at close to full rating?John
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