Inverter building using Wiseguys Power board and the Nano drive board

Author	Message
KeepIS Guru Joined: 13/10/2014 Location: Australia Posts: 1688	Posted: 11:49pm 21 Apr 2024         -dex- said   I have the exact same ATS switch. What is your grid power supply system? Does the N wire also get disconnected/switched? Does integration involve applying 230 voltage to the AR and AN ATS connectors from the nano "mains relay" control output? Hi dex, the system is 230V. I also switch the N and EARTH line, but it depends on weather it's switching between full Mains isolation and Solar only, or running the secondary solar/battery power emergency circuit, with separate Mains plus Solar In-feed active. There are two switches, one is manual and is similar, I had it fitted at the Property Fuse box power entry. It's wired as a typical Mains / Generator power changeover switch / isolation. That's designed to allow all existing Earth leakage detection to operate from the Inverter. A normal stand alone ATS has low voltage detection - restart settings etc, and requires a battery voltage connection, and is not (in my case) a true lockout changeover design, even though it uses dual relays. I don't trust it, and others have claimed these can randomly destroy an inverter under certian load conditions.               This new unit will be enabled via a 48v 240vac switching relay controlled by the controller mains good port. I have added some test code to also invoke a change over if Inverter AC drops below a preset level for whatever reason (set in settings), this is what I'm currently testing, the controller will normally switch the Mains AC Relay output off when it's commanded to stop, but it might be more complex than that under some load conditions. This setting may not be needed, but that's what the extra testing is for. In any case the option can be disabled in setup, the great thing about the Nano - so much flexibility. Edit: Fixed mistake in text. Edited 2024-04-22 11:32 by KeepIS