Hello,
Forgive me for terrible drawing. It is simplified but has essentials to show the problem. I’m contemplating AC side of ESS installation in free standing house. I’m trying to solve few problems but here I’d like to focus on Fireman’s switch where close to the door there is a box allowing fire brigade to shut down electricity in the house. I came up with an idea to put regular disconnect that will cut off grid power. Then another identical disconnect that will be wired to safety switch in inverters and MPPTs. My understanding is that I need to connect only master inverter and rest will follow as well as all RS MPPTs in parallel on second circuit. Will that hold water ?
Bonus question is regarding RCD in my configuration - is type B really needed ? Theory is that there can be malfunction where DC will leak but the price is … First of all - is it needed: a) always, b) to be nice to grid, c) like on the drawing only when you have bypass disconnect, d) meh
