Originally Posted by justinredt91
Working on designing electrical system for a future skoolie build. Want a battery bank system charged by solar. Shore power hook up. And gen set. Very crude thought design right now. What would be a suitable 3 way switch for the application ?
So solar panels to mppt system. to battery bank. To inverter. To 3 way transfer switch to breaker box
Gen set to 3 way to break box
Shore power to 3 way. To breaker box
Does this sound about right?
Like Steve, I don't completely follow. It helps (me) to be clear about AC or DC side of things.
For automatic operation of the AC side of things, you need a transfer switch to flip between shore/generator and inverter. This can be done manually if you prefer that approach.
The DC side of things is much easier. As always, lots of options but let's assume you will have a solar charge controller and AC/shore power charger. These components are semi-intelligent and charge based on battery state. A variety of things can happen when both have power to provide to the battery but all are acceptable and it boils down to one component providing that power and the others detecting that there is nothing to do (read this https://shop.pkys.com/multiple-charge-sources
). Bottom line is that you can have these components all connected and operating without concern. That changes a bit if you have a 'preference' for which one is providing power. For example, some would prefer to charge from solar rather than shore power (maybe on a metered connection). I think that's different than what you asked so will leave it alone.
My coach is kinda complicated but my wiring diagram is here